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- Author:
- Tsheboeng, Gaolathe; Murray-Hudson, Mike; Kashe, Keotshepile
- Source:
- Southern forests 2016 v.78 no.2 pp. 97-104
- ISSN:
- 2070-2639
- Subject:
- Croton; Garcinia; Hyphaene; Syzygium; Vachellia; body water; cluster analysis; community structure; floodplains; forests; indicator species; monitoring; plant communities; riparian areas; species diversity; surface water; woodlands; Botswana
- Abstract:
- ... In the Okavango Delta information on the riparian woodland vegetation community composition and distribution is generally lacking. Past studies in the Delta were mainly focused on the quantitative classification of seasonal floodplain herbaceous vegetation communities. The aim of this study was to determine riparian woodland vegetation communities in the Okavango Delta. Vegetation sampling was con ...
- DOI:
- 10.2989/20702620.2015.1108619
-
http://dx.doi.org/10.2989/20702620.2015.1108619
- Author:
- Uller, Heitor Felippe; Oliveira, Laio Zimermann; Klitzke, Aline Renata; Eleotério, Jackson Roberto; Fantini, Alfredo Celso; Vibrans, Alexander Christian
- Source:
- Southern forests 2019 v.81 no.3 pp. 261-271
- ISSN:
- 2070-2639
- Subject:
- aboveground biomass; branches; carbon; carbon dioxide; forest types; leaves; models; neutralization; rain forests; specific gravity; tree and stand measurements; trees; tropical forests; uncertainty; wood; Brazil
- Abstract:
- ... Forests are the largest biological reservoir of biomass and carbon on the planet. This fact turns them into the main tool to neutralise the CO₂ emitted by human activities. Despite such importance, the uncertainties associated with biomass estimates in forests, especially in (sub)tropical forests, are enormous. Facing this scenario, the objectives of this study were (1) to quantify through destruc ...
- DOI:
- 10.2989/00306525.2019.1581498
-
http://dx.doi.org/10.2989/00306525.2019.1581498
- Author:
- Chan, Julian Moreno; Day, Philip; Feely, John; Thompson, Rob; Little, Keith M; Norris, Craig H
- Source:
- Southern forests 2015 v.77 no.1 pp. 19-30
- ISSN:
- 2070-2639
- Subject:
- Acacia mearnsii; adhesives; bark; beverages; charcoal; consumers (people); exports; farmers; flocculants; forests; fuelwood; hardwood; harvesting; income; kraft pulping; land ownership; leather industry; markets; mechanization; pests; planting; prices; pulp; research and development; silviculture; tannins; trees; vegetables; wages and remuneration; wood chips; wood density; Brazil; China; India; South Africa
- Abstract:
- ... Acacia mearnsii De Wild (black wattle) is an important plantation species for tannin production and woodchip exports in South Africa and Brazil. This study provides an updated overview of the black wattle industries in both countries, including planted areas and land ownership, silviculture and management, bark extract production, woodchip exports, as well as key research and development issues. T ...
- DOI:
- 10.2989/20702620.2015.1006907
-
http://dx.doi.org/10.2989/20702620.2015.1006907
- Author:
- Nambiar, EK Sadanandan; Harwood, Christopher E; Kien, Nguyen Duc
- Source:
- Southern forests 2015 v.77 no.1 pp. 1-10
- ISSN:
- 2070-2639
- Subject:
- Acacia; climate; disease resistance; exports; forests; genotype; growers; income; monitoring; plantations; rural economics; soil; stand management; tree breeding; tree diseases; wood; Vietnam
- Abstract:
- ... Vietnam has established 1.1 million ha of acacia plantations for wood production, managed on 5- to 10-year rotation cycles. Nearly 50% of the resource is managed by small growers holding 1–5 ha woodlots. Acacia plantations have emerged as an important resource for supporting the rural economy and national export revenue. Given the range of climate, terrain, soils, management inputs and skills, pla ...
- DOI:
- 10.2989/20702620.2014.999301
-
http://dx.doi.org/10.2989/20702620.2014.999301
- Author:
- Ramantswana, Muedanyi; McEwan, Andrew; Steenkamp, Jaap
- Source:
- Southern forests 2013 v.75 no.4 pp. 239-246
- ISSN:
- 2070-2639
- Subject:
- Eucalyptus grandis; forestry equipment; forests; harvesters; harvesting; labor; mechanization; planting; pulpwood; regrowth; stem form; stems; trees; South Africa
- Abstract:
- ... Due to the labour challenges in South Africa, mechanised forestry equipment has increasingly been required to operate in complex forest conditions – such as coppiced Eucalyptus compartments – where they have not operated before. For this reason, harvesters are either used in certain coppiced compartments with uncertain productivity expectations, or harvesters are not used in these compartments due ...
- DOI:
- 10.2989/20702620.2013.858213
-
http://dx.doi.org/10.2989/20702620.2013.858213
- Author:
- Eatwell, K A; Verryn, S D; Roux, C Z; Geerthsen, P JM
- Source:
- Southern forests 2011 v.73 no.3-4 pp. 155-163
- ISSN:
- 2070-2639
- Subject:
- Eucalyptus grandis; Pinus patula; breeding value; genetic improvement; parents; prediction; progeny; tree breeding
- Abstract:
- ... Collinearity potentially has a negative impact on the prediction of genetic gains in tree breeding programs. This study investigated the reliability and impact of best linear unbiased prediction (BLUP) using various collinearity mitigation techniques and of two computational numerical precisions on the genetic gains in breeding populations. Multiple-trait, multiple-trial BLUP selection scenarios w ...
- DOI:
- 10.2989/20702620.2011.639490
-
http://dx.doi.org/10.2989/20702620.2011.639490
- Author:
- Mayrinck, Rafaella Carvalho; Filho, Antonio Carlos Ferraz; Ribeiro, Andressa; Oliveira, Ximena Mendes de; Lima, Renato Ribeiro de
- Source:
- Southern forests 2018 v.80 no.4 pp. 373-380
- ISSN:
- 2070-2639
- Subject:
- plantations; models; trees; Weibull statistics; stand basal area; Khaya ivorensis; databases; prediction; forests; Brazil
- Abstract:
- ... The purpose of this study was to compare Beta, Gamma, Johnson's SB and Weibull functions fitted by different methods for describing the horizontal structure of Khaya ivorensis (African mahogany) plantations in Brazil. The database comprised 128 plots from six plantations at varying ages. The function fits were compared using the Kolmogoroff–Smirnoff test, mean bias and mean absolute error for the ...
- DOI:
- 10.2989/20702620.2018.1463189
-
http://dx.doi.org/10.2989/20702620.2018.1463189
- Author:
- Crous, Jacob W; Burger, Louisa
- Source:
- Southern forests 2015 v.77 no.4 pp. 277-285
- ISSN:
- 2070-2639
- Subject:
- Eucalyptus grandis; Eucalyptus urophylla; atmospheric precipitation; clones; coppicing; cost effectiveness; forests; hybrids; planting; stumps; trees; South Africa
- Abstract:
- ... Results from two coppice compared to replant trials are presented that originated from clone by site interaction (CSI) trials established on high‑ and low‑productivity sites in subtropical coastal KwaZulu‑Natal, South Africa. After the 84‑month CSI trial measurements were completed the trees were harvested. Selected plots were allowed to coppice with the remainder replanted to the same four Eucaly ...
- DOI:
- 10.2989/20702620.2015.1063031
-
http://dx.doi.org/10.2989/20702620.2015.1063031
- Author:
- Bulcock, Hartley H; Gush, Mark B; Jewitt, Graham PW
- Source:
- Southern forests 2014 v.76 no.2 pp. 75-84
- ISSN:
- 2070-2639
- Subject:
- Pinus patula; Podocarpus; afforestation; canopy; evaporation; forest plantations; forests; fynbos; grasslands; introduced species; models; planning; planting; soil; transpiration; trees; water management; water use efficiency; South Africa
- Abstract:
- ... A number of studies undertaken in South Africa to quantify the green water-use (total evaporation) of introduced commercial forestry species have shown conclusively that green water-use from commercial forest plantations is substantially higher than from the original grasslands or fynbos that were replaced by afforestation. Green water can be categorised into productive (transpiration) and non-pro ...
- DOI:
- 10.2989/20702620.2014.915451
-
http://dx.doi.org/10.2989/20702620.2014.915451
- Author:
- Roberts, Jonathan C; Little, Keith M; Light, Marnie E
- Source:
- Southern forests 2018 v.80 no.3 pp. 261-268
- ISSN:
- 2070-2639
- Subject:
- triclopyr; felling; mechanization; coppicing; seedlings; Eucalyptus macarthurii; stand basal area; regrowth; control methods; trees; stand establishment; cost effectiveness; cambium; bark; stumps; mortality; forests; South Africa
- Abstract:
- ... Selected cut-stump (Cut_surface) and basal frill (Basal_frill) treatments were tested on Eucalyptus macarthurii cut stumps that had previously been coppiced multiple times. Treatments included the application of herbicide (triclopyr as an amine salt, 360 g L⁻¹), either to the cut-surface or to a basal frill (cuts made through the bark and into the cambium at the base of the tree). These treatments ...
- DOI:
- 10.2989/20702620.2017.1354283
-
http://dx.doi.org/10.2989/20702620.2017.1354283
- Author:
- Lissouck, René Oum; Pommier, Régis; Taillandier, Franck; Mvogo, Jean K; Breysse, Denys; Ohandja, Louis M Ayina
- Source:
- Southern forests 2018 v.80 no.4 pp. 361-371
- ISSN:
- 2070-2639
- Subject:
- basins; decision support systems; endangered species; engineering; forests; glulam; markets; tropical wood
- Abstract:
- ... An alternative approach to the formal management strategy of tropical timber species from the Congo Basin was investigated. It focused on the development of glulam, with an aim to specify a decision support model for the valorisation of tropical timber species considered for use in these products. There were 76 forest species analysed regarding ecological, engineering and social criteria according ...
- DOI:
- 10.2989/20702620.2018.1463153
-
http://dx.doi.org/10.2989/20702620.2018.1463153
- Author:
- Tewari, Vindhya Prasad; Singh, Bilas
- Source:
- Southern forests 2018 v.80 no.1 pp. 59-65
- ISSN:
- 2070-2639
- Subject:
- mathematical models; plantations; stand density; forest management; growth models; Tectona grandis; stand basal area; tropical wood; forests; India
- Abstract:
- ... Tectona grandis (teak) is one of the most important tropical timber species occurring naturally in India. In India, teak is the single most important commercial timber species. Scientifically sound growth models, based on advanced modelling techniques, are often not available, although they are necessary for the successful management of teak stands in the country. Long-term forest planning require ...
- DOI:
- 10.2989/20702620.2016.1277644
-
http://dx.doi.org/10.2989/20702620.2016.1277644
- Author:
- Mwang'ingo, PP; Lulandala, LL
- Source:
- Southern forests 2011 v.73 no.2 pp. 67-71
- ISSN:
- 2070-2639
- Subject:
- Uapaca kirkiana; air layering; biomass; cost effectiveness; deforestation; forests; fruit trees; indole butyric acid; nutritional status; rearing; rooting; roots; shoots; Tanzania
- Abstract:
- ... The potential to propagate Uapaca kirkiana through air layering was investigated at Igumbilo forest, Tanzania. The objective was to determine the effect of time of setting air layers and use of indole-3-butyric acid (IBA) to promote rooting. Air layers were initiated on young shoots, 1-to 2-years old, growing on mature trees. After root initiation, they were detached, potted and reared at the nurs ...
- DOI:
- 10.2989/20702620.2011.610875
-
http://dx.doi.org/10.2989/20702620.2011.610875
- Author:
- Ruwanza, Sheunesu; Gaertner, Mirijam; Esler, Karen J; Richardson, David M
- Source:
- Southern forests 2015 v.77 no.2 pp. 91-105
- ISSN:
- 2070-2639
- Subject:
- Dimorphotheca; Eucalyptus camaldulensis; Olea europaea; allelopathy; bark; cineole; ecosystems; forests; gas chromatography; geomorphology; germination; greenhouse experimentation; habitats; indigenous species; invasive species; leaves; motivation; rivers; root growth; seedling growth; shoots; soil; stream flow; trees; South Africa
- Abstract:
- ... Eucalyptus camaldulensis Dehnh. (red river gum; Myrtaceae) is an invasive tree in riparian habitats of the Western Cape, South Africa, where it replaces indigenous vegetation and affects ecosystem functioning. These invasions lead to changes in river geomorphology and reduction in stream flow. The mechanisms that drive these effects are poorly understood. The potential for allelopathic effects of ...
- DOI:
- 10.2989/20702620.2014.965985
-
http://dx.doi.org/10.2989/20702620.2014.965985
- Author:
- Kora, SA Hamzath; Guendehou, GH Sabin; Goussanou, Cédric A; Assogbadjo, Achille E; Sinsin, Brice
- Source:
- Southern forests 2019 v.81 no.2 pp. 111-122
- ISSN:
- 2070-2639
- Subject:
- Acacia auriculiformis; allometry; biomass; equations; forest ecosystems; forests; models; prediction; statistical analysis; trees; wood; Benin
- Abstract:
- ... Allometric equations are required for a rapid estimation of commercial timber volume and forest biomass stocks. In order to preserve the forest ecosystem, this study applied a non-destructive sampling approach to measure biophysical properties of living trees. From these measurements, volume and biomass models were developed for 11 dominant tree species in a semi-deciduous natural forest and for A ...
- DOI:
- 10.2989/20702620.2018.1512795
-
http://dx.doi.org/10.2989/20702620.2018.1512795
- Author:
- Khushi, Lulu Rayhan; Hossain, Mahmood; Abdullah, SM Rubaiot; Saha, Sanjoy; Siddique, Mohammad Raqibul Hasan
- Source:
- Southern forests 2019 v.81 no.1 pp. 45-48
- ISSN:
- 2070-2639
- Subject:
- Gmelina arborea; aboveground biomass; allometry; bark; branches; carbon; equations; forests; indigenous species; leaves; linear models; nitrogen; phosphorus; plantations; potassium; pulpwood; trees; Bangladesh
- Abstract:
- ... Gmelina arborea Roxb. is a fast-growing, deciduous tree species native to Bangladesh. It has been widely planted since 1992 for commercial production of pulpwood in hilly areas of Bangladesh. The purpose of this study was to derive well-fitting allometric models for estimation of aboveground biomass, and carbon and nutrient (nitrogen, phosphorus and potassium) stocks in G. arborea to ensure sustai ...
- DOI:
- 10.2989/20702620.2018.1488209
-
http://dx.doi.org/10.2989/20702620.2018.1488209
- Author:
- Mensah, Sylvanus; Veldtman, Ruan; Seifert, Thomas
- Source:
- Southern forests 2017 v.79 no.1 pp. 19-30
- ISSN:
- 2070-2639
- Subject:
- Combretum; Croton; Syzygium; Trichilia dregeana; aboveground biomass; allometry; biomass production; branches; carbon; equations; forest inventory; models; rain forests; tree and stand measurements; trees; variance; South Africa
- Abstract:
- ... Novel species-specific equations for the estimation of height and aboveground biomass were established for four dominant tree species (Syzygium gerrardii Burtt Davy, Combretum kraussii Hochst., Trichilia dregeana Sond. and Croton sylvaticus Hochst.), in the Northern Mistbelt Forests of South Africa. A non-destructive sampling methodology was applied, which was based on measuring standing trees, se ...
- DOI:
- 10.2989/20702620.2016.1225187
-
http://dx.doi.org/10.2989/20702620.2016.1225187
- Author:
- Bondé, Loyapin; Ganamé, Moussa; Ouédraogo, Oumarou; Nacoulma, Blandine MI; Thiombiano, Adjima; Boussim, Joseph I
- Source:
- Southern forests 2018 v.80 no.2 pp. 143-150
- ISSN:
- 2070-2639
- Subject:
- Tamarindus indica; allometry; analysis of variance; biomass; equations; forests; income; leaves; medicine; model validation; models; nontimber forest products; people; prediction; socioeconomics; trees; Burkina Faso
- Abstract:
- ... Tamarindus indica L. is a multi-purpose tropical species. In West Africa the local people use its leaves daily as a source of food, medicine and income. To prevent the over-exploitation of this species for its use for non-timber forest products, the estimation of foliage production needs to be adressed. This study aimed to (1) assess the effects of distribution zone and tree size on foliage produc ...
- DOI:
- 10.2989/20702620.2017.1292451
-
http://dx.doi.org/10.2989/20702620.2017.1292451
- Author:
- van Niekerk, PB; Drew, DM; Dovey, SB; du Toit, B
- Source:
- Southern forests 2020 v.82 no.1 pp. 15-23
- ISSN:
- 2070-2639
- Subject:
- Eucalyptus grandis; Eucalyptus nitens; United Nations Framework Convention on Climate Change; aboveground biomass; allometry; carbon; carbon footprint; carbon sinks; clearcutting; databases; environmental policy; forests; guidelines; hybrids; models; ownership; pulpwood; statistical analysis; stemwood; tree and stand measurements; wood volume; South Africa
- Abstract:
- ... South Africa is new to the implementation of climate change policies, and the forestry sector in this country is taking ownership of estimating its greenhouse gas inventories. Improving the level of accuracy of carbon stock estimations calls for the population of a national biomass database on commercially planted species. The development of models to predict the biomass of Eucalyptus grandis × ni ...
- DOI:
- 10.2989/20702620.2019.1686686
-
http://dx.doi.org/10.2989/20702620.2019.1686686
- Author:
- Gardner, Robin AW; Little, Keith M; Kanzler, Arnulf; Naidoo, Thimagren N
- Source:
- Southern forests 2018 v.80 no.2 pp. 115-129
- ISSN:
- 2070-2639
- Subject:
- Corymbia; Eucalyptus benthamii; Glycaspis brimblecombei; Leptocybe invasa; altitude; atmospheric precipitation; forests; insect pests; planting; pulpwood; temperate zones; temperature; tree and stand measurements; tree growth; trees; South Africa
- Abstract:
- ... During 2001, a series of four site–taxa interaction trials was established in the warm temperate (mean annual temperature range 16–19 °C) forestry climatic zone of KwaZulu-Natal (KZN), South Africa. The main objective was to investigate the commercial forestry potential of a range of alternative Eucalyptus and Corymbia taxa for moderately dry (mean annual precipitation < 850 mm) sites within the z ...
- DOI:
- 10.2989/20702620.2017.1337434
-
http://dx.doi.org/10.2989/20702620.2017.1337434
- Author:
- Hongwane, Phillip; Mitchell, Glen; Kanzler, Arnulf; Verryn, Steven; Lopez, Juan; Chirwa, Paxie
- Source:
- Southern forests 2018 v.80 no.4 pp. 301-310
- ISSN:
- 2070-2639
- Subject:
- Fusarium circinatum; Pinus caribaea; Pinus elliottii; Pinus maximinoi; Pinus oocarpa; Pinus patula; Pinus radiata; Pinus tecunumanii; altitude; cold; forests; freezing; fungi; hybrids; parents; plant improvement; planting; rain; summer; temperate zones; winter; Eswatini; South Africa
- Abstract:
- ... Through the collaborative efforts of companies affiliated with the International Program for Tree Improvement and Conservation (Camcore), a number of pine hybrids have been produced over the last decade. Many of these have been planted in trials across southern Africa that broadly represent winter and summer rainfall areas, with the latter ranging from warm to cold temperate sites. The five-year s ...
- DOI:
- 10.2989/20702620.2017.1393744
-
http://dx.doi.org/10.2989/20702620.2017.1393744
- Author:
- Ghaffariyan, Mohammad R; Spinelli, Raffaele; Brown, Mark
- Source:
- Southern forests 2013 v.75 no.3 pp. 129-136
- ISSN:
- 2070-2639
- Subject:
- biomass; case studies; equations; feeding methods; harvesting; models; prediction; pulp; trees; wood; Australia; Italy; North America; South America
- Abstract:
- ... The chipping operation is an important component of harvesting systems producing biomass and pulp chips. This paper aimed to develop a valid model to predict the productivity of chipping as part of these operations. Over a number of years more than 200 different time studies were conducted on chipping operations in Italy and Australia. Multiple regressions and backward stepwise data analysis metho ...
- DOI:
- 10.2989/20702620.2013.816233
-
http://dx.doi.org/10.2989/20702620.2013.816233
- Author:
- Deb, Jiban Chandra; Halim, Md. Abdul; Ahmed, Enam
- Source:
- Southern forests 2012 v.74 no.2 pp. 103-113
- ISSN:
- 2070-2639
- Subject:
- Acacia auriculiformis; autocorrelation; biomass; carbon sinks; data collection; equations; forests; linear models; t-test; trees; Bangladesh
- Abstract:
- ... Tree biomass plays an important role in sustainable management and in estimating forest carbon stocks. The objective of this study was to select the best model for measuring stem biomass of Acacia auriculiformis in the study area. Data from five hillocks and 120 individual trees from each hillock were used in this study. Twelve different forms of linear, power and exponential equations were compar ...
- DOI:
- 10.2989/20702620.2012.701429
-
http://dx.doi.org/10.2989/20702620.2012.701429
- Author:
- Fraser, Stuart; McTaggart, Alistair R; Chan, Julian Moreno; Nxumalo, Thobile; Shuey, Louise S; Wingfield, Michael J; Roux, Jolanda
- Source:
- Southern forests 2019 v.81 no.1 pp. 85-90
- ISSN:
- 2070-2639
- Subject:
- Acacia mearnsii; Uromycladium; field experimentation; forests; plantations; protocols; Southern Africa
- Abstract:
- ... Uromycladium acaciae is the cause of a severe wattle rust epidemic in plantations of Acacia mearnsii (black wattle) in southern Africa. Research on the biology of this damaging rust is assisting in the development of control strategies. One strategy under investigation is the identification and deployment of resistant lines of A. mearnsii. Selection of resistant families currently relies on large- ...
- DOI:
- 10.2989/20702620.2018.1468985
-
http://dx.doi.org/10.2989/20702620.2018.1468985
- Author:
- Azeez, Ismail O; Popoola, Labode; Shulamite, Idowu O
- Source:
- Southern forests 2017 v.79 no.2 pp. 143-151
- ISSN:
- 2070-2639
- Subject:
- Gmelina arborea; agricultural land; canopy; credit; crops; data collection; education; farmers; farms; forest regeneration; forest reserves; forestry development; forests; funding; interviews; issues and policy; males; planting; questionnaires; statistics; sustainable forestry; taungya system; trees; Nigeria
- Abstract:
- ... Balancing forest regeneration and meeting food and fibre needs of Nigeria’s ever-increasing population challenges is imperative to her sustainable development. Two methods of artificial forest regeneration practiced in Oyo State, Nigeria to meet these challenges are direct planting and taungya systems. This paper reports the performance of the taungya system of forest regeneration in Osho Forest R ...
- DOI:
- 10.2989/20702620.2016.1255425
-
http://dx.doi.org/10.2989/20702620.2016.1255425
- Author:
- Bhatt, Isha M; S, Pramod; Koyani, Rina D; Rajput, Kishore S
- Source:
- Southern forests 2015 v.77 no.4 pp. 297-303
- ISSN:
- 2070-2639
- Subject:
- Coriolus hirsutus; Coriolus versicolor; Leucaena leucocephala; Trametes; cell walls; confocal laser scanning microscopy; decay fungi; decayed wood; delignification; forests; sap; sapwood
- Abstract:
- ... The structural changes in the cell wall and delignification pattern caused by Trametes versicolor and Trametes hirsuta in the sap wood of Leucaena leucocephala were examined by light and confocal laser scanning microscopy. The in vitro decay test was conducted for 12 weeks. Both species of Trametes used in this study caused anatomical characteristics specific to simultaneous white rot. Formation o ...
- DOI:
- 10.2989/20702620.2015.1063032
-
http://dx.doi.org/10.2989/20702620.2015.1063032
- Author:
- Guerra, Saulo Philipe Sebastião; Soler, Rafael Ribeiro; Sereghetti, Guilherme Corrêa; Oguri, Guilherme
- Source:
- Southern forests 2019 v.81 no.3 pp. 281-284
- ISSN:
- 2070-2639
- Subject:
- Eucalyptus; economics; forests; harvesting; logging; mechanization; planting; seedlings; silvicultural practices; trees; Brazil
- Abstract:
- ... From an economic point of view, Eucalyptus is the most important forest genus in Brazil, covering more than 5 million ha. However, most of the silvicultural practices have a low level of mechanisation compared with harvesting and logging operations. This study presents an evaluation of the economics and productivity of the first Brazilian experience of using a planter device attached to an excavat ...
- DOI:
- 10.2989/20702620.2019.1615225
-
http://dx.doi.org/10.2989/20702620.2019.1615225
- Author:
- Gafur, Abdul; Nasution, Aswardi; Yuliarto, Muhammad; Yong, Wong Ching; Sharma, Mukesh
- Source:
- Southern forests 2015 v.77 no.1 pp. 75-81
- ISSN:
- 2070-2639
- Subject:
- Acacia mangium; Ganoderma; Hevea brasiliensis; biological control agents; crossing; disease control; forests; genotype; hybrids; inoculum; pathogens; planting; rapid methods; root rot; screening; silviculture; wood
- Abstract:
- ... Red root rot disease caused by Ganoderma philippii is one of the most economically important diseases of tropical Acacia species. Research on field control of the disease has to date focused on inoculum reduction, silviculture practices and application of biological control agents. Incorporation of tolerant genotypes, a key component of integrated disease management, has not been adequately explor ...
- DOI:
- 10.2989/20702620.2014.999304
-
http://dx.doi.org/10.2989/20702620.2014.999304
- Author:
- He, Cheng; Hong, Xiafang; Liu, Kezhen; Zhang, Siyu; Wang, Qiuwen
- Source:
- Southern forests 2016 v.78 no.1 pp. 53-60
- ISSN:
- 2070-2639
- Subject:
- Larix gmelinii; Populus tomentosa; correlation; forest surveys; forests; models; tree and stand measurements; trees; wood
- Abstract:
- ... An improved technique, cheaper and less time-consuming, to measure standing wood volume by using an electronic theodolite was tested, by which greater information from the forest could be acquired accurately and non-destructively. This was achieved by recording the diameter at breast height and ground-level diameter of a tree as well as the included angle between the electronic theodolite and the ...
- DOI:
- 10.2989/20702620.2015.1108617
-
http://dx.doi.org/10.2989/20702620.2015.1108617
- Author:
- Kaptein, Nkosinathi D; Savage, Michael J; Light, Marnie E
- Source:
- Southern forests 2019 v.81 no.1 pp. 31-37
- ISSN:
- 2070-2639
- Subject:
- Eucalyptus dunnii; Internet; Pinus; automation; bark; coir; containers; equations; forestry; forests; gravimetry; irrigation scheduling; irrigation systems; leaching; microprocessors; nursery stock; nutrients; perlite; pests; polystyrenes; seedlings; soil water; soil water content; vermiculite; water conservation; water content; water stress
- Abstract:
- ... Efficient nursery irrigation is a key factor for the production of high-quality forestry planting stock. Conventional timer-based irrigation systems used by most forestry nurseries have some drawbacks that, if not properly managed, can lead to over-irrigation and water wastage, leaching of nutrients and contribute to increased incidences of pests and/or diseases. A practical method to accurately m ...
- DOI:
- 10.2989/20702620.2018.1479922
-
http://dx.doi.org/10.2989/20702620.2018.1479922
- Author:
- Costa, Alan N; Bartimachi, Alessandra; Vasconcelos, Heraldo L; Bruna, Emilio M; Vieira-Neto, Ernane HM
- Source:
- Southern forests 2020 v.82 no.1 pp. 65-69
- ISSN:
- 2070-2639
- Subject:
- biomass; cerrado; conservation areas; dry season; ecosystems; environmental quality; forests; habitats; landscapes; leaf abscission; leaves; plant litter; savannas; spatial variation; temporal variation; traps; vegetation gradient; woodlands; woody plants; Brazil
- Abstract:
- ... The Brazilian Cerrado is a heterogeneous ecosystem where annual woody-layer litter production shows strong spatiotemporal variation. Although Cerrado litter dynamics have been well-documented in forest physiognomies, knowledge from savanna habitats remains limited despite their predominance across the landscape. In this study, the fine-woody litter production and their fractions were quantified th ...
- DOI:
- 10.2989/20702620.2019.1686691
-
http://dx.doi.org/10.2989/20702620.2019.1686691
- Author:
- Dudley, Nicklos S; Jones, Tyler C; James, Robert L; Sniezko, Richard A; Cannon, Phil; Borthakur, Dulal
- Source:
- Southern forests 2015 v.77 no.1 pp. 65-73
- ISSN:
- 2070-2639
- Subject:
- Acacia koa; Fusarium oxysporum; durability; field experimentation; forests; fungi; genetic resistance; germplasm; greenhouse experimentation; greenhouses; landowners; mortality; pathogens; reforestation; screening; seedlings; seeds; trees; vascular wilt; virulence; Hawaii
- Abstract:
- ... Acacia koa is a valuable tree species economically, ecologically and culturally in Hawai'i. A vascular wilt disease of A. koa resulting from infection by the fungal pathogen Fusarium oxysporum f. sp. koae (FOXY) causes high rates of mortality in field plantings and threatens native A. koa forests in Hawai'i. Landowners are reluctant to consider A. koa for reforestation and restoration in many area ...
- DOI:
- 10.2989/20702620.2015.1007263
-
http://dx.doi.org/10.2989/20702620.2015.1007263
- Author:
- Moloi, Thabo; Brink, Michal; Chirwa, Paxie W; Ngulube, Elisha
- Source:
- Southern forests 2018 v.80 no.2 pp. 169-173
- ISSN:
- 2070-2639
- Subject:
- Pinus patula; experimental design; farms; forests; harvesting; models; regression analysis; tractors; weather; South Africa
- Abstract:
- ... The productivity of skidding tractors in intermediate harvesting operations has not been determined in Mpumalanga, South Africa. The objective of this study was to develop a productivity model using a farm tractor in first thinning operations in Pinus patula compartments. A work study design was used to assess the performance of a skidding agricultural tractor. From 350 samples, important data var ...
- DOI:
- 10.2989/20702620.2017.1312904
-
http://dx.doi.org/10.2989/20702620.2017.1312904
- Author:
- Handavu, Ferdinand; Chirwa, Paxie W; Syampungani, Stephen; Mahamane, Larwanou
- Source:
- Southern forests 2017 v.79 no.2 pp. 95-102
- ISSN:
- 2070-2639
- Subject:
- biomass; carbon; carbon sinks; forests; issues and policy; land use and land cover maps; landscapes; livelihood; models; socioeconomics; spatial variation; stand density; sustainable forestry; uncertainty; wood; woodlands; Southern Africa
- Abstract:
- ... Provision of accurate carbon (C) measurements and analysis are critical components in quantification of C stocks. The objectives of this review were to (1) compile and synthesise current knowledge of available methods for C stock estimation, (2) examine socio-economic drivers of land-use and land-cover change and their influence on woodland C stocks and (3) identify gaps of knowledge and methodolo ...
- DOI:
- 10.2989/20702620.2016.1277643
-
http://dx.doi.org/10.2989/20702620.2016.1277643
- Author:
- Titshall, Louis; Dovey, Steven; Rietz, Diana
- Source:
- Southern forests 2013 v.75 no.4 pp. 169-183
- ISSN:
- 2070-2639
- Subject:
- biomass; forestry; forests; mechanization; monitoring; plantations; soil; soil productivity
- Abstract:
- ... An overview of southern African research that has investigated the impact of management practices that can potentially affect the long-term site productivity of plantations is presented, with an emphasis of these impacts on soil productivity and with the implications for multiple-rotation site productivity. Activities that are most likely to cause long-term changes in soil productivity are identif ...
- DOI:
- 10.2989/20702620.2013.858210
-
http://dx.doi.org/10.2989/20702620.2013.858210
- Author:
- Coetzee, M PA; Wingfield, B D; Golani, G D; Tjahjono, B; Gafur, A; Wingfield, M J
- Source:
- Southern forests 2011 v.73 no.3-4 pp. 175-180
- ISSN:
- 2070-2639
- Subject:
- Acacia mangium; Eucalyptus; Ganoderma; fruiting; fruiting bodies; pathogens; phylogeny; plantations; root rot; roots; trees; Indonesia
- Abstract:
- ... Ganoderma root rot is the most serious disease affecting commercially planted Acacia mangium in plantations in Indonesia. Numerous Ganoderma spp. have been recorded from diseased trees of this species and to a lesser extent Eucalyptus, causing confusion regarding the primary cause of the disease. In this study, a large collection of Ganoderma isolates were obtained from the roots of A. mangium sho ...
- DOI:
- 10.2989/20702620.2011.639488
-
http://dx.doi.org/10.2989/20702620.2011.639488
- Author:
- Ackerman, Pierre A; van der Merwe, Elizabeth A; Pulkki, Reino E
- Source:
- Southern forests 2017 v.79 no.4 pp. 329-338
- ISSN:
- 2070-2639
- Subject:
- case studies; cash flow analysis; felling; forest roads; forests; geographic information systems; harvesting; humans; landscapes; marketing; roadsides; sawlogs; softwood; supply chain
- Abstract:
- ... Supply chain management principles were analysed by investigating the effects of smaller-scale and incremental interventions in a forest-to-mill value chain on financial returns and forest resource use in an Eastern Cape case study area. Three previous studies provided input by determining fibre balances, a terrain factor, and primary and secondary transport travel speeds and efficiencies. Network ...
- DOI:
- 10.2989/20702620.2016.1255380
-
http://dx.doi.org/10.2989/20702620.2016.1255380
- Author:
- Ismail, Riyad; Kassier, Horst; Chauke, Morries; Holecz, Francesco; Hattingh, Nico
- Source:
- Southern forests 2015 v.77 no.3 pp. 203-211
- ISSN:
- 2070-2639
- Subject:
- Eucalyptus; business enterprises; forests; models; planning; plantations; synthetic aperture radar; timber supply; South Africa
- Abstract:
- ... In commercial forestry, regular terrestrial enumerations of the growing stock are required for the valuation, sustain-able management and planning of current and future timber supplies. In this study we examined whether the combination of synthetic aperture radar (ALOS PALSAR) and optical satellite (SPOT 4) image data can accurately predict the timber volume of even-aged Eucalyptus plantations loc ...
- DOI:
- 10.2989/20702620.2014.1001681
-
http://dx.doi.org/10.2989/20702620.2014.1001681
- Author:
- Huy, Bao; Tri, Pham Cong; Triet, Tran
- Source:
- Southern forests 2018 v.80 no.1 pp. 75-84
- ISSN:
- 2070-2639
- Subject:
- Dipterocarpaceae; Tectona grandis; altitude; flooded conditions; forests; industrial crops; logging; phosphorus pentoxide; planting; regression analysis; rubber; sand; soil types; survival rate; trees; wet season; Vietnam
- Abstract:
- ... After years of unsustainable logging, dry deciduous dipterocarp forest (DDDF) has become poor in timber stocks and has been converted to industrial crops such as rubber. The objectives of this study were to assess teak (Tectona grandis L.f.) tree establishment under degraded DDDF conditions and to determine factors that influence the suitability of teak as a forest enrichment tree species. A set o ...
- DOI:
- 10.2989/20702620.2017.1286560
-
http://dx.doi.org/10.2989/20702620.2017.1286560
- Author:
- Swett, Cassandra L; Porter, Bernice; Fourie, Gerda; Steenkamp, Emma T; Gordon, Thomas R; Wingfield, Michael J
- Source:
- Southern forests 2014 v.76 no.3 pp. 161-166
- ISSN:
- 2070-2639
- Subject:
- Briza maxima; DNA; Ehrharta; Fusarium circinatum; Pinus; Pseudotsuga menziesii; disease occurrence; endophytes; forests; fungi; grasses; host range; hosts; inoculum; nucleotide sequences; pathogens; plantations; sanitation; virulence; California; South Africa
- Abstract:
- ... The pitch canker pathogen, Fusarium circinatum , has major impacts on production in pine nurseries and plantations in South Africa. Thus far, efforts to reduce local spread have focused on rouging of infected pines and sanitation to eliminate local sources of inoculum. Although the host range of F. circinatum was thought to be limited to pines and Douglas-fir, recent studies in California indicate ...
- DOI:
- 10.2989/20702620.2014.916087
-
http://dx.doi.org/10.2989/20702620.2014.916087
- Author:
- Louw, JH; Germishuizen, I; Smith, CW
- Source:
- Southern forests 2011 v.73 no.1 pp. 51-62
- ISSN:
- 2070-2639
- Subject:
- analysis of variance; case studies; climatic factors; databases; decision making; forestry; forests; landscape ecology; landscapes; models; plant physiology; plantations; prediction; risk management; soil surveys; temperature; South Africa
- Abstract:
- ... The benefits of high-resolution forest site classification systems have been widely acknowledged in South Africa as a prerequisite for decision-making in forestry management. Although substantial research and development work have been done on categorising and mapping the soil and geological environment, surprisingly little has been done to improve our understanding of the role of climate in plant ...
- DOI:
- 10.2989/20702620.2011.574825
-
http://dx.doi.org/10.2989/20702620.2011.574825
- Author:
- Corley, Juan C; Dimarco, Romina D; Fischbein, Déborah; Lantschner, María V; Martínez, Andrés S; Masciocchi, Maité; Mattiacci, Analia; Paritsis, Juan; Villacide, José M
- Source:
- Southern forests 2018 v.80 no.4 pp. 285-291
- ISSN:
- 2070-2639
- Subject:
- Coleoptera; Pinus; afforestation; conifers; developing countries; forests; habitats; indigenous species; insects; monitoring; plantations; softwood; species richness; taxonomy; trees; Argentina
- Abstract:
- ... Softwood forestry with non-native tree species is increasing worldwide and especially in many developing countries of the Southern Hemisphere. Tree plantations are beneficial in environmental and socioeconomic aspects, but at the same time there are recognised costs associated with afforestation. Our aim was to revise the existing information on the impact of exotic conifer plantations in north-we ...
- DOI:
- 10.2989/20702620.2018.1432536
-
http://dx.doi.org/10.2989/20702620.2018.1432536
- Author:
- López-Sánchez, Carlos A; Rodríguez-Soalleiro, Roque; Castedo-Dorado, Fernando; Corral-Rivas, Sacramento; Álvarez-González, Juan G
- Source:
- Southern forests 2016 v.78 no.2 pp. 131-135
- ISSN:
- 2070-2639
- Subject:
- Pseudotsuga menziesii; autocorrelation; bark; equations; forests; models; plantations; trees; Spain
- Abstract:
- ... Five stem taper models belonging to three different taper function categories were fitted to data corresponding to 282 Pseudotsuga menziesii trees. The trees were selected in the area surrounding 61 research plots installed in Galicia, Asturias and the Basque Country, northern Spain. The models were simultaneously fitted to observed values of diameter outside bark and inside bark. A third-order co ...
- DOI:
- 10.2989/20702620.2015.1136505
-
http://dx.doi.org/10.2989/20702620.2015.1136505
- Author:
- Germishuizen, Ilaria; Gardner, Robin AW
- Source:
- Southern forests 2015 v.77 no.2 pp. 123-130
- ISSN:
- 2070-2639
- Subject:
- Eucalyptus nitens; air temperature; artificial intelligence; autumn; breeding; buds; climate; cold; environmental factors; forests; genetic improvement; landscapes; models; plantation forestry; rain; seed orchards; spring; summer; topography; South Africa
- Abstract:
- ... Shy seed production in orchards of Eucalyptus nitens is a major barrier to the deployment of genetic gain in South African plantations. A machine learning method was used to identify optimal sites for the establishment of E. nitens seed orchards within the plantation forestry landscape of the summer rainfall region of South Africa. The ensemble classifier random forests (RF) was used to identify t ...
- DOI:
- 10.2989/20702620.2014.984554
-
http://dx.doi.org/10.2989/20702620.2014.984554
- Author:
- Richardson, David M; Le Roux, Johannes J; Wilson, John RU
- Source:
- Southern forests 2015 v.77 no.1 pp. 31-39
- ISSN:
- 2070-2639
- Subject:
- Acacia; Pinus; biological control; cost benefit analysis; cultivars; disturbed soils; ecosystems; forest industries; forests; humans; invasive species; monitoring; plantation forestry; planting; risk; trees; wattles; South Africa; South East Asia
- Abstract:
- ... Problems associated with invasiveness of non-native tree species used in forestry are increasing rapidly worldwide and are most severe in areas with a long history of plantings. Lessons learnt in areas with long histories of plantings and invasions may be applicable to areas with shorter planting histories. Most research towards understanding such tree invasions has focused on Pinus species, thoug ...
- DOI:
- 10.2989/20702620.2014.999305
-
http://dx.doi.org/10.2989/20702620.2014.999305
- Author:
- Rodas, Carlos A; Serna, Rubén; Bolaños, Maria D; Granados, Ginna M; Wingfield, Michael J; Hurley, Brett P
- Source:
- Southern forests 2015 v.77 no.3 pp. 165-171
- ISSN:
- 2070-2639
- Subject:
- Pineus; plantations; insect pests; introduced species; greenhouse experimentation; instars; Pinus kesiya; predators; surveys; trees; planting; predation; biological control; forests; Colombia
- Abstract:
- ... Adelgids (Hemiptera) in the genus Pineus have been reported as introduced insect pests causing serious losses to Pinus plantations worldwide. In 2008, Pineus boerneri was recorded for the first time in Colombia, with infestations noted on Pinus kesiya , P. tecunumanii , P. maximinoi and P. oocarpa . The lack of information on this insect in Colombia prompted investigations of its life cycle and in ...
- DOI:
- 10.2989/20702620.2014.1001662
-
http://dx.doi.org/10.2989/20702620.2014.1001662
- Author:
- Rodas, Carlos A; Hurley, Brett P; Bolaños, María D; Granados, Ginna M; Wingfield, Michael J
- Source:
- Southern forests 2018 v.80 no.3 pp. 279-284
- ISSN:
- 2070-2639
- Subject:
- Chrysididae; Diapheromeridae; Pinus patula; defoliating insects; eggs; females; financial economics; forests; instars; males; natural enemies; parasitic wasps; plantations; population dynamics; sex ratio; Colombia
- Abstract:
- ... Plantations of Pinus spp. in Colombia are severely damaged by various phasmid (Phasmatodea: Diapheromeridae) insects. Of these, Litosermyle ocanae is one of the most serious defoliators. Since 1988, several outbreaks have been recorded in Pinus patula plantations, resulting in substantial economic losses. The aim of this study was to determine the life cycle of Litosermyle ocanae in P. patula plan ...
- DOI:
- 10.2989/20702620.2017.1334175
-
http://dx.doi.org/10.2989/20702620.2017.1334175
- Author:
- Phiri, Darius; Ackerman, Pierre; Wessels, Brand; du Toit, Ben; Johansson, Marie; Säll, Harald; Lundqvist, Sven-Olof; Seifert, Thomas
- Source:
- Southern forests 2015 v.77 no.4 pp. 255-262
- ISSN:
- 2070-2639
- Subject:
- Eucalyptus; allometry; bark; biomass; branches; branchwood; carbon sequestration; coasts; drought tolerance; equations; forests; leaves; models; stemwood; trees; South Africa
- Abstract:
- ... In the water-scarce environment of South Africa, drought-tolerant eucalypt species have the potential to contribute to the timber and biomass resource. Biomass functions are a necessary prerequisite to predict yield and carbon sequestration. In this study preliminary biomass models for Eucalyptus cladocalyx , E. gomphocephala and E. grandis · E. camaldulensis from the dry West Coast of South Afric ...
- DOI:
- 10.2989/20702620.2015.1055542
-
http://dx.doi.org/10.2989/20702620.2015.1055542
- Author:
- Ghaffariyan, M R; Brown, M; Acuna, M; Sessions, J; Kuehmaier, M; Wiedemann, J
- Source:
- Southern forests 2011 v.73 no.3-4 pp. 149-154
- ISSN:
- 2070-2639
- Subject:
- Eucalyptus; biomass production; energy; fellers; forests; harvesting; harvesting equipment; plantations; regression analysis; trucks; Western Australia
- Abstract:
- ... Australia is at an early stage of exploring the use of forest biomass to generate energy. This study evaluated the biomass yield and the productivity rates of equipment for harvesting biomass in a poor-quality eucalypt plantation. The operation consisted of a tracked feller-buncher, grapple skidder and mobile chipper. Time study methods were used to measure the harvesting operation. A multiple reg ...
- DOI:
- 10.2989/20702620.2011.639491
-
http://dx.doi.org/10.2989/20702620.2011.639491
- Author:
- Toromani, E; Sanxhaku, M; Sallaku, M; Shaho, E
- Source:
- Southern forests 2011 v.73 no.2 pp. 91-99
- ISSN:
- 2070-2639
- Subject:
- Populus; analysis of variance; biomass production; carbon; carbon sequestration; equations; linear models; plantations; planting; tree and stand measurements; trees; water content; Albania
- Abstract:
- ... Fast-growing plantations of Populus ×canadensis Moench (syn. P. ×euramericana (Dode) Guinier ex Piccarolo) clone I-214 have good potential for biomass production. The objective of the study was estimation of biomass using allometric equations and estimation of carbon allocation according to tree components. The study was carried out in five poplar stands (total area 16.9 ha) in the Pogradeci regio ...
- DOI:
- 10.2989/20702620.2011.610877
-
http://dx.doi.org/10.2989/20702620.2011.610877
- Author:
- Hakamada, Rodrigo; Hubbard, Robert M; Ferraz, Silvio; Stape, José Luiz; Lemos, Cristiane
- Source:
- Southern forests 2017 v.79 no.3 pp. 251-257
- ISSN:
- 2070-2639
- Subject:
- Eucalyptus; biomass production; climate; climate change; clones; dry season; forest stands; forests; genotype; leaf water potential; plant density; planting; silvicultural practices; stand density; stemwood; trees; water stress; wet season; Brazil
- Abstract:
- ... The choice of planting density and tree genotype are basic decisions when establishing a forest stand. Understanding the interaction between planting density and genotype, and their relationship with biomass production and potential water stress, is crucial as forest managers are faced with a changing climate. However, few studies have investigated this relationship, especially in areas with highl ...
- DOI:
- 10.2989/20702620.2016.1256041
-
http://dx.doi.org/10.2989/20702620.2016.1256041
- Author:
- Griffin, A Rod; Chi, Nghiem Quynh; Harbard, Jane L; Son, Do Huu; Harwood, Christopher E; Price, Aina; Vuong, Tran Duc; Koutoulis, Anthony; Thinh, Ha Huy
- Source:
- Southern forests 2015 v.77 no.1 pp. 41-50
- ISSN:
- 2070-2639
- Subject:
- Acacia mangium; breeding; clones; diploidy; disease resistance; forests; growers; heterosis; heterozygosity; hybrids; reproductive performance; rooting; seeds; stress tolerance; tetraploidy; trees; triploidy; wind; wood fibers; Vietnam
- Abstract:
- ... The paper reviews a decade of progress with breeding new polyploid varieties of Acacia mangium and other tropical acacias in Vietnam, and outlines plans for future strategies to complement conventional diploid breeding. Polyploid breeding is a means of introducing diversity into breeding populations, of making step-change improvements in wood fibre and other properties, and reducing reproductive o ...
- DOI:
- 10.2989/20702620.2014.999303
-
http://dx.doi.org/10.2989/20702620.2014.999303
- Author:
- Corley, JC; Villacide, JM; Vesterinen, M
- Source:
- Southern forests 2012 v.74 no.3 pp. 195-202
- ISSN:
- 2070-2639
- Subject:
- Coleoptera; Pinus; arid zones; canopy; grazing; habitats; insects; pitfall traps; plantations; pruning; sheep; species diversity; steppes; vegetation cover; Argentina
- Abstract:
- ... Pine plantations are thought to negatively impact species diversity and to irreversibly modify arid zones. However, some studies have suggested that through the application of appropriate management practices, the negative impacts of plantations may be reduced. Our aim was to study the effects of early pruning and thinning on the ground-dwelling insects found in pine tree plantations in Patagonia. ...
- DOI:
- 10.2989/20702620.2012.722837
-
http://dx.doi.org/10.2989/20702620.2012.722837
- Author:
- Wessels, CB; de V du Plessis, J; Smit, NH
- Source:
- Southern forests 2011 v.73 no.1 pp. 15-22
- ISSN:
- 2070-2639
- Subject:
- algorithms; sawing; sawmills
- Abstract:
- ... Automated three-dimensional log scanning and positioning systems in a sawmill have a limited time available to reach an optimal positioning solution before primary breakdown sawing starts. In this study a search algorithm (tentacle algorithm) was developed for this task and was empirically evaluated in terms of its ability to find an optimal or close-to-optimal positioning solution in a limited nu ...
- DOI:
- 10.2989/20702620.2011.576486
-
http://dx.doi.org/10.2989/20702620.2011.576486
- Author:
- Bhatta, Suresh Prashad; Devkota, Anjana
- Source:
- Southern forests 2020 v.82 no.1 pp. 47-55
- ISSN:
- 2070-2639
- Subject:
- Shorea robusta; allometry; carbon; carbon sinks; climate change; community forestry; equations; rain forests; sampling; shrubs; trees; Nepal
- Abstract:
- ... Four community-managed Sal forests in Dadeldhura district of Nepal were selected for the assessment of carbon stock. The stratified random sampling method was applied to measure the field data from 105 sample plots of 100 m². The carbon stock of trees and shrubs was estimated using Chave allometric equations for moist forests. The study found that the community forests stored carbon stock ranging ...
- DOI:
- 10.2989/20702620.2019.1686690
-
http://dx.doi.org/10.2989/20702620.2019.1686690
- Author:
- Njana, Marco A; Zahabu, Eliakimu; Malimbwi, Rogers E
- Source:
- Southern forests 2018 v.80 no.3 pp. 217-232
- ISSN:
- 2070-2639
- Subject:
- Avicennia marina; Ceriops tagal; Rhizophora mucronata; anthropogenic activities; biomass production; carbon; carbon dioxide; carbon sinks; dead wood; death; deforestation; ecosystem services; greenhouse gas emissions; mangrove forests; plant cuttings; uncertainty; Southern Africa; Tanzania
- Abstract:
- ... Mangroves offer a number of ecosystem goods and services, including carbon (C) storage. As a carbon pool, mangroves could be a source of CO₂ emissions as a result of human activities such as deforestation and forest degradation. Conversely, mangroves may act as a CO₂ sink through biomass accumulation. This study aimed to determine carbon stocks, harvest removals and productivity of mangrove forest ...
- DOI:
- 10.2989/20702620.2017.1334314
-
http://dx.doi.org/10.2989/20702620.2017.1334314
- Author:
- Scalenghe, Riccardo; Celi, Luisella; Costa, Giovanna; Laudicina, V Armando; Santoni, Stefania; Vespertino, Dario; La Mantia, Tommaso
- Source:
- Southern forests 2015 v.77 no.4 pp. 263-267
- ISSN:
- 2070-2639
- Subject:
- Eucalyptus camaldulensis; aboveground biomass; afforestation; belowground biomass; branches; carbon; carbon sinks; forests; leaves; planning; plantations; planting; roots; semiarid zones; soil; tropics; Italy; Sicily
- Abstract:
- ... Eucalyptus stands in semi‑arid areas may contribute to enhance carbon (C) stocks in both biomass and soil. However, the limited information available is mainly focused on short‑rotation plantations. In this study, the above‑ and below‑ground C pools in five 50‑year‑old Eucalyptus camaldulensis Dehnh. stands planted on Miocenic evaporitic deposits in Sicily, Italy, with a xeric and thermic pedoclim ...
- DOI:
- 10.2989/20702620.2015.1055541
-
http://dx.doi.org/10.2989/20702620.2015.1055541
- Author:
- Roux, J; Wingfield, MJ; Fourie, A; Noeth, K; Barnes, I
- Source:
- Southern forests 2020 v.82 no.1 pp. 24-31
- ISSN:
- 2070-2639
- Subject:
- Ceratocystis; DNA; Eucalyptus grandis; Eucalyptus urophylla; cambium; death; discoloration; forests; fungal diseases of plants; genes; hybrids; internal transcribed spacers; pathogenicity; plant pathogenic fungi; roots; sapwood; sequence analysis; stems; trees; vascular wilt; South Africa
- Abstract:
- ... Wilt and death of an E. grandis × E. urophylla variety was recently observed in the Zululand region of KwaZulu-Natal, South Africa. Symptoms on the dying trees included a streaking pattern of discolouration in the sapwood and cambium of stems and roots. A fungus resembling a Ceratocystis sp. was consistently found sporulating on diseased material and isolated from the symptomatic root and stem tis ...
- DOI:
- 10.2989/20702620.2019.1686687
-
http://dx.doi.org/10.2989/20702620.2019.1686687
- Author:
- Santos, Glaucia Regina; Otto, Marina Shinkai Gentil; Passos, José Raimundo de Souza; Onofre, Felipe Ferreira; Rodrigues, Valdemir Antônio; de Paula, Felipe Rossetti; Ferraz, Silvio Frosini de Barros
- Source:
- Southern forests 2019 v.81 no.4 pp. 285-295
- ISSN:
- 2070-2639
- Subject:
- Eucalyptus; aquatic environment; botanical composition; collectors; ecological function; ecosystems; edge effects; indigenous species; introduced plants; leaves; lignin content; plant litter; riparian areas; riparian forests; species richness; surveys; Brazil
- Abstract:
- ... Exotic species in riparian environments can influence the quantity and quality of litterfall in the ecological system. The objective of this study was to evaluate the influence of Eucalyptus leaves on litterfall and terrestrial and aquatic leaf decomposition in a riparian forest in São Paulo state, Brazil. Three riparian zones were evaluated, and they were designated as areas of low (L), medium (M ...
- DOI:
- 10.2989/20702620.2019.1633503
-
http://dx.doi.org/10.2989/20702620.2019.1633503
- Author:
- Mangwale, Kagiso; Shackleton, Charlie M; Sigwela, Ayanda
- Source:
- Southern forests 2017 v.79 no.4 pp. 305-315
- ISSN:
- 2070-2639
- Subject:
- harvesting; agricultural land; allometry; equations; land use; fuelwood; soil; aerial photography; carbon; carbon sinks; coasts; natural regeneration; biodiversity; biomass; stand basal area; forest damage; forests; South Africa
- Abstract:
- ... Land-use intensification and declines in vegetative cover are considered pervasive threats to forests and biodiversity globally. The small extent and high biodiversity of indigenous forests in South Africa make them particularly important. Yet, relatively little is known about their rates of use and change. From analysis of past aerial photos we quantified rates of forest cover change in the Matiw ...
- DOI:
- 10.2989/20702620.2016.1255480
-
http://dx.doi.org/10.2989/20702620.2016.1255480
- Author:
- Deb, Jiban Chandra; Salman, Md Habibur Rahman; Halim, Md Abdul; Chowdhury, Md Qumruzzaman; Roy, Anindita
- Source:
- Southern forests 2014 v.76 no.4 pp. 201-208
- ISSN:
- 2070-2639
- Subject:
- Shorea robusta; forest stands; foresters; forests; models; plantations; prediction; probability; stand structure; timber management; trees; Bangladesh
- Abstract:
- ... For many years foresters have been using statistical probability density functions to describe and characterise stand structure. Predicting the current and future yields of a stand is essential for successful stand and timber management. Implicit prediction of current yield is accomplished by using diameter distribution methods. All diameter distribution yield systems predict the number of trees p ...
- DOI:
- 10.2989/20702620.2014.947077
-
http://dx.doi.org/10.2989/20702620.2014.947077
- Author:
- Aguayo, María Graciela; Gacitúa, William; Valenzuela, Paulina; Mendonça, Regis Teixeira; Reyes, Pablo
- Source:
- Southern forests 2018 v.80 no.4 pp. 293-300
- ISSN:
- 2070-2639
- Subject:
- Aextoxicon; Drimys winteri; Fitzroya cupressoides; Laurelia; Laureliopsis philippiana; Libocedrus chilensis; Nothofagus alpina; Nothofagus dombeyi; carbohydrate content; cell walls; chemical analysis; forests; glucans; hardness; hemicellulose; lignin content; modulus of elasticity; physicochemical properties; Chile
- Abstract:
- ... The objective of this research was to study the chemical and nanomechanical characteristics of native woods grown in southern Chile region. The species analysed were Drimys winteri, Laureliopsis philippiana, Aextoxicon puctatum, Nothofagus alpina, Nothofagus dombeyi, Laurelia sempervirens, Austrocedrus chilensis and Fitzroya cupressoides. The samples were collected from the regions of Biobío (37° ...
- DOI:
- 10.2989/20702620.2017.1376269
-
http://dx.doi.org/10.2989/20702620.2017.1376269
- Author:
- Ky-Dembele, Catherine; Bayala, Jules; Kalinganire, Antoine; Traoré, Fatoumata Tata; Koné, Bréhima; Olivier, Alain
- Source:
- Southern forests 2016 v.78 no.3 pp. 193-199
- ISSN:
- 2070-2639
- Subject:
- Pterocarpus; Sahel; cutting; forage; forests; genotype; indole butyric acid; pruning; rooting; roots; softwood; trees; vegetative propagation; Mali; South America
- Abstract:
- ... Pterocarpus santalinoides is a multipurpose tree species, native to Africa and South America. However, excessive pruning for fodder is jeopardising its seed production leading to poor regeneration in the Sahel region. Efficient vegetative propagation techniques may overcome this concern. To address this issue, four experiments were conducted to determine the effects of substrate (Experiment 1), cu ...
- DOI:
- 10.2989/20702620.2016.1150696
-
http://dx.doi.org/10.2989/20702620.2016.1150696
- Author:
- Pretzsch, H; Biber, P; Uhl, E; Hense, P
- Source:
- Southern forests 2012 v.74 no.4 pp. 237-246
- ISSN:
- 2070-2639
- Subject:
- Pinus pinaster; Pinus radiata; adults; allometry; carbon sequestration; dendrochronology; ecosystems; fine roots; forests; growth rings; models; mortality; root growth; shoots; water stress; South Africa
- Abstract:
- ... The relationship between root and shoot growth and how it is modified by chronic or episodic drought stress is so far not well understood. Allometric partitioning theory (APT) supposes a constant root–shoot allometry. Optimal partitioning theory (OPT) assumes that plants’ root growth is enhanced under water limitation. However, recent studies show that fine and coarse roots react differently. This ...
- DOI:
- 10.2989/20702620.2012.741794
-
http://dx.doi.org/10.2989/20702620.2012.741794
- Author:
- Tshidzumba, Ratsodo Phillip; Chirwa, Paxie W; Babalola, Folaranmi D
- Source:
- Southern forests 2018 v.80 no.4 pp. 381-389
- ISSN:
- 2070-2639
- Subject:
- forestry; forests; households; income; infrastructure; issues and policy; land reform; livelihood; models; politics; sampling; South Africa
- Abstract:
- ... One of the dominant challenges facing the South African forestry sector is the issue of land restitution. The aim of this study was, therefore, to assess the perception of beneficiaries of benefit-sharing modalities for forest-based land reform initiatives in their locality. A random sampling technique selected 140 and 175 households in Amabomvini and Cata communities in KwaZulu-Natal and Eastern ...
- DOI:
- 10.2989/20702620.2018.1463190
-
http://dx.doi.org/10.2989/20702620.2018.1463190
- Author:
- Kayes, I; Deb, JC; Comeau, P; Das, S
- Source:
- Southern forests 2012 v.74 no.3 pp. 175-181
- ISSN:
- 2070-2639
- Subject:
- Acacia auriculiformis; plantations; probability; stand structure; tree and stand measurements; Bangladesh
- Abstract:
- ... Statistical probability density functions are widely used to model tree diameter distributions and to describe stand structure. The objective of this study was to compare the performance of normal, logarithmic-normal and three-parameter Weibull distributions for fitting diameter data from Akashmoni (Acacia auriculiformis A. Cunn. ex Benth.) plantations grown in the north-eastern region of Banglade ...
- DOI:
- 10.2989/20702620.2012.717409
-
http://dx.doi.org/10.2989/20702620.2012.717409
- Author:
- Osei, Richard; Ansong, Michael; Zerbe, Stefan
- Source:
- Southern forests 2019 v.81 no.3 pp. 255-260
- ISSN:
- 2070-2639
- Subject:
- bamboos; biodiversity; biodiversity conservation; carbon sequestration; developing countries; erosion control; forests; furniture; harvesting; income; livelihood; oxygen; riverbank protection; socioeconomics; trees; tropics; Ghana
- Abstract:
- ... Natural forests are disappearing in many tropical countries, resulting in loss of biodiversity and erosion of forest-dependent livelihoods. The maintenance and restoration of forests as well as a search for alternative natural resources that can concurrently improve the environment and enhance incomes of local communities has become crucial. Bamboo is suggested as a resource, which could substitut ...
- DOI:
- 10.2989/20702620.2019.1581499
-
http://dx.doi.org/10.2989/20702620.2019.1581499
- Author:
- Hung, Trieu Thai; Doyle, Richard; Eyles, Alieta; Mohammed, Caroline
- Source:
- Southern forests 2017 v.79 no.1 pp. 9-18
- ISSN:
- 2070-2639
- Subject:
- Acacia auriculiformis; Acacia mangium; Acrisols; acidification; carbon; carbon nitrogen ratio; fallow; forests; hybrids; land use; nitrogen; pH; particle size distribution; plantations; planting; shifting cultivation; soil degradation; soil properties; Vietnam
- Abstract:
- ... Despite the common use of Acacia species in Vietnam, few studies have examined changes to total soil nitrogen (TN) and total soil carbon (TC) following the planting of Acacia mangium × Acacia auriculiformis (Acacia hybrid) plantations (AH) on formerly eroded and degraded soils. We compared the impact of AH with adjacent fallow land within a shifting cultivation system (FSC) on various soil propert ...
- DOI:
- 10.2989/20702620.2016.1225185
-
http://dx.doi.org/10.2989/20702620.2016.1225185
- Author:
- Mitchell, R Glen; Wingfield, Michael J; Steenkamp, Emma T; Roux, Jolanda; Verryn, Steven; Coutinho, Teresa A
- Source:
- Southern forests 2014 v.76 no.3 pp. 151-159
- ISSN:
- 2070-2639
- Subject:
- Fusarium circinatum; Pinus patula; clones; foresters; forests; greenhouse experimentation; greenhouses; open pollination; pathogens; screening; seedlings; seeds; trees; South Africa
- Abstract:
- ... Since the first appearance of Fusarium circinatum in South Africa in 1990, foresters have been challenged with poor field survival of Pinus patula seedlings at establishment. One of the best long-term solutions is to improve the genetic tolerance of P. patula to infection by the pathogen. Currently, large numbers of families are routinely screened for their tolerance to F. circinatum by infecting ...
- DOI:
- 10.2989/20702620.2014.899061
-
http://dx.doi.org/10.2989/20702620.2014.899061
- Author:
- Lundqvist, Sven-Olof; Grahn, Thomas; Olsson, Lars; Seifert, Thomas
- Source:
- Southern forests 2017 v.79 no.3 pp. 215-225
- ISSN:
- 2070-2639
- Subject:
- Eucalyptus grandis; biomass; drought tolerance; dry environmental conditions; forest plantations; forests; genotype; hybrids; juvenility; small farms; stems; wood density; South Africa
- Abstract:
- ... Three drought-tolerant eucalypt genotypes have been investigated for a broad spectrum of properties to provide a basis for comparison on their suitability for various end-uses. The genotypes included were a Eucalyptus grandis × E. camaldulensis hybrid, E. gomphocephala and E. cladocalyx , selected based on previous studies that indicated good potential to tolerate arid conditions, reasonably good ...
- DOI:
- 10.2989/20702620.2016.1254910
-
http://dx.doi.org/10.2989/20702620.2016.1254910
- Author:
- Hodge, GR; Dvorak, WS; Tighe, ME
- Source:
- Southern forests 2012 v.74 no.1 pp. 7-17
- ISSN:
- 2070-2639
- Subject:
- Pinus caribaea var. hondurensis; autumn; climatic factors; electrolytes; freezing; frost resistance; genetic variation; growth chambers; hybrids; introduced species; latitude; photoperiod; planting; progeny; seedlings; temperature; trees; Brazil; Central America; Mexico; South Africa; United States
- Abstract:
- ... An artificial freezing study was conducted with 14 pine species and varieties from Mexico and Central America, and the southern and western USA. The pines chosen represented major commercial plantation species in the Southern Hemisphere such as Pinus caribaea var. hondurensis, P. taeda (multiple sources), P. patula and P. radiata, as well as promising species such as P. greggii, P. maximinoi and P ...
- DOI:
- 10.2989/20702620.2012.683637
-
http://dx.doi.org/10.2989/20702620.2012.683637
- Author:
- Vermeulen, WJ; Geldenhuys, CJ; Esler, KJ; Syampungani, S; Meke, G
- Source:
- Southern forests 2020 v.82 no.1 pp. 32-46
- ISSN:
- 2070-2639
- Subject:
- bark; decision making; forests; fungal diseases of plants; harvesting; insect pests; medicinal plants; plant pathogenic fungi; regrowth; traditional medicine; trees; wood; woodlands; Malawi; South Africa; Zambia
- Abstract:
- ... Tree bark is widely used in traditional medicine in southern Africa. The growing demand for medicinal bark requires scientifically sound harvest systems for sustainable use. A conceptual framework and decision matrix are presented to aid forest managers in selecting the most appropriate system for the sustainable harvesting of particular species. The conceptual framework is based on the results of ...
- DOI:
- 10.2989/20702620.2019.1686689
-
http://dx.doi.org/10.2989/20702620.2019.1686689
- Author:
- Beck-Pay, Sascha L
- Source:
- Southern forests 2013 v.75 no.1 pp. 1-6
- ISSN:
- 2070-2639
- Subject:
- Acacia mearnsii; bark; colchicine; crossing; diploidy; field experimentation; flow cytometry; forest industries; germ cells; leaves; ovules; progeny; seed set; seeds; soaking; tetraploidy; trees; triploidy; South Africa
- Abstract:
- ... Acacia mearnsii (black wattle) is grown commercially in South Africa for its timber and bark. However, the invasive nature of the species has resulted in it being considered an alien invader and for this reason research has been aimed at producing a sterile triploid variety that would be highly desirable for the South African commercial forestry industry. Tetraploids were successfully induced by s ...
- DOI:
- 10.2989/20702620.2013.743763
-
http://dx.doi.org/10.2989/20702620.2013.743763
- Author:
- Jeyanny, V; Husni, MH Ahmad; Kumar, B Siva; Rasidah, K Wan; Suhaimi, WC
- Source:
- Southern forests 2016 v.78 no.4 pp. 315-319
- ISSN:
- 2070-2639
- Subject:
- carbon; carbon sequestration; carbon sinks; forest litter; forest reserves; montane forests; mycorrhizal fungi; vesicular arbuscular mycorrhizae; Malaysia
- Abstract:
- ... Forest floor carbon stocks, which include different components of litter, hemic and sapric materials, have not been empirically quantified in tropical montane forest, although they influence soil carbon (C) pools. To date, the contribution of arbuscular mycorrhizae in C sequestration potentials in tropical montane forests have not been clearly investigated. This study determined the amount of C st ...
- DOI:
- 10.2989/20702620.2016.1225186
-
http://dx.doi.org/10.2989/20702620.2016.1225186
- Author:
- Williams, Chloe; Ackerman, Pierre
- Source:
- Southern forests 2016 v.78 no.4 pp. 267-274
- ISSN:
- 2070-2639
- Subject:
- Pinus elliottii; energy use and consumption; equipment; forest industries; forests; harvesting; mechanization; models; plantations; regression analysis; sawlogs; tree and stand measurements; South Africa
- Abstract:
- ... The South African forestry industry is experiencing an increase in the number of fully mechanised timber-harvesting systems. Understanding the productivity of these systems, for which data is currently limited for South Africa, is an important step to maximise the utilisation of machines being used. A time study of a mechanised cut-to-length system was conducted in Pinus elliottii sawtimber planta ...
- DOI:
- 10.2989/20702620.2016.1183096
-
http://dx.doi.org/10.2989/20702620.2016.1183096
- Author:
- Rolando, CA; Pammenter, NW; Little, KM
- Source:
- Southern forests 2011 v.73 no.1 pp. 41-49
- ISSN:
- 2070-2639
- Subject:
- Pinus patula; environmental factors; mortality; plant available water; planting; root growth; roots; seedlings; shoots; soil air; stomatal conductance; stomatal movement; temperature; water potential; water stress
- Abstract:
- ... A pot trial was implemented to determine the effect of soil water stress following transplanting on shoot water potential and stomatal conductance of Pinus patula seedlings. The relationship of seedling morphology to measures of water stress was also investigated. The trial consisted of two watering treatments: a control (no water stress) and a severe water stress (no further water after planting) ...
- DOI:
- 10.2989/20702620.2011.576481
-
http://dx.doi.org/10.2989/20702620.2011.576481
- Author:
- Fourie, Gerda; Wingfield, Michael J; Wingfield, Brenda D; Jones, Nicky B; Morris, Andrew R; Steenkamp, Emma T
- Source:
- Southern forests 2014 v.76 no.3 pp. 137-143
- ISSN:
- 2070-2639
- Subject:
- Fusarium circinatum; conidia; dieback; forests; fungicides; inoculum; insect control; mortality; pathogens; quantitative polymerase chain reaction; root crown; sanitation; seedlings; shoots
- Abstract:
- ... The primary symptoms associated with Fusarium circinatum infection in pine seedling nurseries are root and collar rot, shoot and tip die-back and seedling mortality. Management of this pathogen in nurseries usually involves the integration of various strategies relating to sanitation, insect control and fungicide treatment. The overall goal of this study was to use quantitative real-time PCR (qPCR ...
- DOI:
- 10.2989/20702620.2014.899058
-
http://dx.doi.org/10.2989/20702620.2014.899058
- Author:
- Mugasha, Wilson A; Bollandsås, Ole M; Gobakken, Terje; Zahabu, Eliakimu; Katani, Josiah Z; Eid, Tron
- Source:
- Southern forests 2017 v.79 no.1 pp. 65-77
- ISSN:
- 2070-2639
- Subject:
- harvesting; decision support systems; planning; allometry; models; forestry development; timber production; charcoal; woodlands; biomass; stand basal area; mortality; prediction; forests; Tanzania
- Abstract:
- ... Rational forest management planning requires information on the present forest state and on future development. However, forest management planning in Tanzania has often been done without any information on forest development because appropriate tools are lacking. This study presents a matrix model that combines distance-independent growth and mortality models, area-based recruitment models, and a ...
- DOI:
- 10.2989/20702620.2016.1233776
-
http://dx.doi.org/10.2989/20702620.2016.1233776
- Author:
- Bone, Rachel A; Parks, Kate E; Hudson, Malcolm D; Tsirinzeni, Mathews; Willcock, Simon
- Source:
- Southern forests 2017 v.79 no.4 pp. 269-275
- ISSN:
- 2070-2639
- Subject:
- cattle; correlation; deforestation; forests; hospitals; land cover; males; population density; population pressure; sex ratio; socioeconomic factors; tropics; Malawi
- Abstract:
- ... Land cover has changed rapidly across the tropics over the past century; however, detailed historical information describing the extent and possible drivers of such change is widely lacking. Here, we constructed a history of land-cover change at the district level in Malawi over a 37-year period from 1972 to 2009, the immediate post-colonial phase. Overall, there was a loss of 12 760 km2 (36%) of ...
- DOI:
- 10.2989/20702620.2016.1233777
-
http://dx.doi.org/10.2989/20702620.2016.1233777
- Author:
- Lindner, Berndt G; Vlok, PJ; Wessels, C Brand
- Source:
- Southern forests 2015 v.77 no.3 pp. 191-201
- ISSN:
- 2070-2639
- Subject:
- algorithms; computer software; cost estimates; forests; lumber; manufacturing; markets; models; planning; production costs; raw materials; ripping; sawing; sawlogs; sawmills; trees
- Abstract:
- ... for wood manufacturers around the world, the single biggest cost factor is known to be its raw material. Maximum volume recovery of this raw material is, therefore, of key importance for the industry. The wood products industry consists of several interrelated manufacturing steps for converting trees into logs and logs into finished lumber. Each operation usually optimises its functionality in iso ...
- DOI:
- 10.2989/20702620.2014.1001678
-
http://dx.doi.org/10.2989/20702620.2014.1001678
- Author:
- Ramantswana, M; McEwan, A; Pauw, J
- Source:
- Southern forests 2012 v.74 no.3 pp. 151-157
- ISSN:
- 2070-2639
- Subject:
- Acacia mearnsii; harvesting; tree and stand measurements; trees; South Africa
- Abstract:
- ... The aim of this study was to determine the effect of tree size, bark-wood bond strength and tree form on the productivity of cut-to-length harvesting of Acacia mearnsii, using an excavator-based harvester with a SP Maskiner harvester head in the KwaZulu-Natal forestry region of South Africa. Tree diameter and height measurements were used to determine individual tree volumes, after which the trees ...
- DOI:
- 10.2989/20702620.2012.722823
-
http://dx.doi.org/10.2989/20702620.2012.722823
- Author:
- Sarker, Swapan Kumar; Das, Niamjit; Chowdhury, Md Qumruzzaman; Haque, Md Mohasinul
- Source:
- Southern forests 2013 v.75 no.1 pp. 51-57
- ISSN:
- 2070-2639
- Subject:
- Artocarpus; biomass; carbon; data collection; equations; growth models; leaf area; leaves; linear models; prediction; t-test; tree and stand measurements; tree growth; trees; Bangladesh
- Abstract:
- ... Estimation of leaf area (LA) and leaf biomass (LB) is important to understand plant physiological and carbon assimilation processes, and tree growth models. The aim of this study was to develop and compare allometric equations for predicting LA and LB of Artocarpus chaplasha Roxb. taking diameter at breast height (DBH) and tree height as predictors. Data of tree parameters were collected randomly ...
- DOI:
- 10.2989/20702620.2013.773601
-
http://dx.doi.org/10.2989/20702620.2013.773601
- Author:
- Algera, Madeleen; Kätsch, Christoph; Chirwa, Paxie W
- Source:
- Southern forests 2019 v.81 no.2 pp. 141-150
- ISSN:
- 2070-2639
- Subject:
- Pinus caribaea var. hondurensis; Pinus elliottii; altitude; forests; hybrids; models; prediction; rain; sampling; soil; standard deviation; temperature; trees; South Africa
- Abstract:
- ... A relatively new hybrid, Pinus elliottii × P. caribaea var. hondurensis (Pexc), for which a taper model does not exist, is being planted commercially in South Africa. This study primarily focused on developing a taper model for Pexc in South Africa. Taper data were collected from a total of 363 trees, in the Mpumalanga and Limpopo provinces, using a random sampling method. A subsample was selected ...
- DOI:
- 10.2989/20702620.2018.1520027
-
http://dx.doi.org/10.2989/20702620.2018.1520027
- Author:
- Tsega, Mengesha; Guadie, Awoke; Teffera, Zebene Lakew; Belayneh, Yigez; Niu, Dongjie
- Source:
- Southern forests 2019 v.81 no.1 pp. 79-84
- ISSN:
- 2070-2639
- Subject:
- Cupressus lusitanica; data collection; equations; forests; models; prediction; sampling; statistics; tree and stand measurements; trees; Ethiopia
- Abstract:
- ... Stem volume equations were fitted for Cupressus lusitanica in Gergeda Forest, Ethiopia using six different established equation forms. A total of 260 trees were measured for their diameter at breast height (D), total height (H)and stem volume using destructive sampling methods. The data set was randomly divided into equal size for equation development and equation validation. Five fit statistics c ...
- DOI:
- 10.1080/02571862.2018.1512786
-
http://dx.doi.org/10.1080/02571862.2018.1512786
- Author:
- Lumbres, Roscinto Ian C; Jin Lee, Young
- Source:
- Southern forests 2013 v.75 no.3 pp. 123-128
- ISSN:
- 2070-2639
- Subject:
- Pinus kesiya; data collection; equations; forests; models; prediction; statistics; trees; Philippines
- Abstract:
- ... Stem volume equations (overbark) were developed, using established volume equation forms, and validated using a subset of the data collected for Pinus kesiya in Benguet province, Philippines. A total of 481 trees from Pinus kesiya stands in Benguet were measured through non-destructive sampling. The data set was randomly split into two subsets for initial model development (80% of the data set) an ...
- DOI:
- 10.2989/20702620.2013.809637
-
http://dx.doi.org/10.2989/20702620.2013.809637
- Author:
- Tewari, Vindhya Prasad; Diwakara, Baragur N
- Source:
- Southern forests 2018 v.80 no.3 pp. 251-259
- ISSN:
- 2070-2639
- Subject:
- Santalum album; data collection; equations; even-aged stands; forest ecosystems; forests; models; plantations; stand density; India
- Abstract:
- ... Stand density management diagrams are average stand-level models that graphically display the relationship between stand yield, density, height and diameter throughout the various stages of forest development in even-aged stands. These are useful tools for designing, displaying and evaluating alternative density regimes in even-aged forest ecosystems to achieve a desired future condition. In this ...
- DOI:
- 10.2989/20702620.2017.1379321
-
http://dx.doi.org/10.2989/20702620.2017.1379321
- Author:
- Lumbres, RIC; Lee, YJ; Seo, YO; Calora, FG
- Source:
- Southern forests 2012 v.74 no.2 pp. 115-120
- ISSN:
- 2070-2639
- Subject:
- Pinus kesiya; forests; growth models; managers; prediction; site index; Philippines
- Abstract:
- ... This study was conducted to develop a height–age growth model and site index curves for site quality evaluation of old secondary-growth stands of Pinus kesiya in the northern Philippines. The Chapman-Richards growth function was used in the guide curve method to generate anamorphic site index curves for this species. In order to evaluate the developed model, coefficient of determination (R²), root ...
- DOI:
- 10.2989/20702620.2012.701441
-
http://dx.doi.org/10.2989/20702620.2012.701441
- Author:
- Yao, Rui Ling; Glencross, Kevin; Nichols, J Doland
- Source:
- Southern forests 2014 v.76 no.2 pp. 93-100
- ISSN:
- 2070-2639
- Subject:
- Corymbia citriodora; Eucalyptus; canopy; forests; leaf area; leaves; plantations; sapwood; shade tolerance; trees; Australia
- Abstract:
- ... In eucalypt plantations in subtropical Australia, Eucalyptus dunnii exhibits greater diameter increment after thinning than more shade-tolerant Corymbia citriodora . To elucidate the mechanism underlying this difference, we investigated relationships between tree leaf area and sapwood area following thinning in 11-year-old E. dunnii and C. citriodora plantations. There was no significant differenc ...
- DOI:
- 10.2989/20702620.2014.917354
-
http://dx.doi.org/10.2989/20702620.2014.917354
- Author:
- Tchichelle, Sogni Viviane; Epron, Daniel; Mialoundama, Fidèle; Koutika, Lydie Stella; Harmand, Jean-Michel; Bouillet, Jean-Pierre; Mareschal, Louis
- Source:
- Southern forests 2017 v.79 no.1 pp. 1-8
- ISSN:
- 2070-2639
- Subject:
- Acacia mangium; Arenosols; Eucalyptus urophylla; coastal plains; edaphic factors; forest litter; forest plantations; forests; harvesting; mineral soils; mineralization; nitrogen; nitrogen cycle; nutrients; sandy soils; soil fertility; topsoil; trees; tropical soils; wood; Republic of the Congo
- Abstract:
- ... Sustainable wood production requires appropriate management of commercial forest plantations. Establishment of industrial eucalypt plantations on poor sandy soils leads to a high loss of nutrients including nitrogen (N) after wood harvesting. An ecological intensification of eucalypt plantations was tested with the replacement of half of the Eucalyptus urophylla × E. grandis by Acacia mangium in t ...
- DOI:
- 10.2989/20702620.2016.1221702
-
http://dx.doi.org/10.2989/20702620.2016.1221702
- Author:
- Poona, Nitesh K; Ismail, Riyad
- Source:
- Southern forests 2013 v.75 no.1 pp. 29-40
- ISSN:
- 2070-2639
- Subject:
- Fusarium circinatum; Pinus radiata; fungi; image analysis; landscapes; neural networks; plantations; remote sensing; trees; vegetation
- Abstract:
- ... Pathogenic fungi, such as Fusarium circinatum, present a serious threat to Pinus radiata plantations. The effective management of infected trees is thus paramount. Coupled with advanced techniques, high spatial resolution remote sensing data provides the necessary tools to effectively identify and map infected trees. This paper explores the utility of transformed high spatial resolution QuickBird ...
- DOI:
- 10.2989/20702620.2012.748255
-
http://dx.doi.org/10.2989/20702620.2012.748255
- Author:
- Maússe-Sitoe, Sílvia ND; Chen, ShuaiFei; Wingfield, Michael J; Roux, Jolanda
- Source:
- Southern forests 2016 v.78 no.3 pp. 169-183
- ISSN:
- 2070-2639
- Subject:
- Botryosphaeriaceae; Calonectria; Corymbia citriodora; Cryphonectriaceae; DNA; Eucalyptus camaldulensis; Phakopsora; forestry; forests; fungi; leaf spot; nucleotide sequences; pathogens; pests; plantations; stem cankers; surveys; trees; Mozambique
- Abstract:
- ... In the mid-1970s, Mozambique embarked on several forestry projects to promote and establish large plantation areas with eucalypt trees. The planted species included Corymbia citriodora , Eucalyptus camaldulensis , E. saligna and E. tereticornis . Similar to other regions of the world, pests and pathogens pose a significant threat to eucalypt plantations in Mozambique, but little is known regarding ...
- DOI:
- 10.2989/20702620.2015.1126780
-
http://dx.doi.org/10.2989/20702620.2015.1126780
- Author:
- Jimu, Luke; Wingfield, Michael J; Mwenje, Eddie; Roux, Jolanda
- Source:
- Southern forests 2015 v.77 no.3 pp. 221-230
- ISSN:
- 2070-2639
- Subject:
- Armillaria; Botryosphaeriaceae; Capnodiales; Ceratocystis; DNA; Eucalyptus; Ophiostoma; agroclimatology; breeding; disease control; forests; fungi; highlands; leaf spot; nucleotide sequences; pathogens; plantations; planting; stem cankers; stem rot; stumps; surveys; Zimbabwe
- Abstract:
- ... Zimbabwe embarked on planting Eucalyptus species in the early 1900s. Based on a robust breeding programme, it has become a major source of seed for other countries in and outside Africa. Tree health surveys conducted on Eucalyptus in some east and southern African countries over the past two decades have revealed several important fungal diseases that were previously not known in the region, but l ...
- DOI:
- 10.2989/20702620.2014.1001682
-
http://dx.doi.org/10.2989/20702620.2014.1001682
- Author:
- Crous, Casparus J; Greyling, Izette; Wingfield, Michael J
- Source:
- Southern forests 2018 v.80 no.2 pp. 175-184
- ISSN:
- 2070-2639
- Subject:
- Eucalyptus grandis; atmospheric precipitation; carbon; clones; dieback; drought; drought tolerance; forests; gas exchange; hybrids; hydraulic conductivity; landscapes; leaves; pathogens; stable isotopes; transpiration; trees; water stress; water use efficiency; wood density; xylem; South Africa
- Abstract:
- ... In South Africa, there is currently a phenomenon where a Eucalyptus grandis × E. urophylla clone is dying on a large scale, whereas co-occurring clones in the same plantation area remain healthy. No primary biotic pathogen has been isolated from these dying trees. However, the plantation region has endured severe drought conditions. We hypothesised that the specific E. grandis × E. urophylla clone ...
- DOI:
- 10.2989/20702620.2017.1315546
-
http://dx.doi.org/10.2989/20702620.2017.1315546
- Author:
- Prihatini, Istiana; Glen, Morag; Wardlaw, Tim J; Mohammed, Caroline L
- Source:
- Southern forests 2016 v.78 no.1 pp. 19-34
- ISSN:
- 2070-2639
- Subject:
- DNA; Dothideomycetes; Leotiomycetes; Pinus radiata; Sordariomycetes; barcoding; conifer needles; conifers; databases; forests; fungi; nucleotide sequences; plantations; polymerase chain reaction; New Zealand; Tasmania
- Abstract:
- ... Needle fungi have been extensively studied in conifers but rarely in Pinus radiata . Previous studies of P. radiata have been based on fungal isolation and not direct PCR detection from needles. This research was a component of a study examining factors linked to spring needle cast (SNC) in Tasmanian P. radiata plantations and aimed to identify as many as possible of the fungal species commonly as ...
- DOI:
- 10.2989/20702620.2015.1092345
-
http://dx.doi.org/10.2989/20702620.2015.1092345
- Author:
- Gandiwa, Edson; Zisadza-Gandiwa, Patience; Goza, David; Mashapa, Clayton; Muboko, Never
- Source:
- Southern forests 2014 v.76 no.2 pp. 111-116
- ISSN:
- 2070-2639
- Subject:
- conservation areas; ecosystems; edaphic factors; forests; national parks; savannas; soil; species diversity; vegetation structure; woodlands; woody plants; Zimbabwe
- Abstract:
- ... Despite the importance of edaphic factors in influencing woody vegetation diversity and structure in savannas, there is still limited research on the topic across most savanna ecosystems. Here we investigate the differences and/or similarities of woody vegetation diversity and structure across areas with different edaphic factors (i.e. soil group) in Gonarezhou National Park, Zimbabwe. We stratifi ...
- DOI:
- 10.2989/20702620.2014.921007
-
http://dx.doi.org/10.2989/20702620.2014.921007
- Author:
- Mgaga, Palesa; Scholes, Mary C
- Source:
- Southern forests 2019 v.81 no.4 pp. 377-385
- ISSN:
- 2070-2639
- Subject:
- case studies; curriculum; data collection; ecosystems; empirical research; experts; foresters; forestry; forests; industry; interviews; occupations; politics; research planning; social sciences; stakeholders; students; trees; South Africa
- Abstract:
- ... A modern day forester in South Africa assumes a variety of roles that constantly challenge them to remain professionally relevant in a dynamic system including the continuously expanding number of stakeholders that cuts across political, social and economic boundaries. This study is important in understanding how a forester’s job has shifted from simply managing trees and forests for timber to man ...
- DOI:
- 10.2989/20702620.2019.1615230
-
http://dx.doi.org/10.2989/20702620.2019.1615230
- Author:
- Tewari, Vindhya P; Álvarez-González, Juan G; von Gadow, Klaus
- Source:
- Southern forests 2014 v.76 no.1 pp. 21-27
- ISSN:
- 2070-2639
- Subject:
- Tectona grandis; equations; forests; models; prediction; site index; trees; variance; India
- Abstract:
- ... Data from 27 remeasured sample plots were used to evaluate dynamic base-age invariant site index models for teak (Tectona grandis) forests in Karnataka, India. The data were obtained in observational field studies covering a wide range of sites in Karnataka and provided up to three interval measurements per plot. All the functions were fitted simultaneously using iterative seemingly unrelated regr ...
- DOI:
- 10.2989/20702620.2013.870398
-
http://dx.doi.org/10.2989/20702620.2013.870398
- Author:
- Thompson, Iain M
- Source:
- Southern forests 2013 v.75 no.4 pp. 185-188
- ISSN:
- 2070-2639
- Subject:
- risk; snow damage; hybrids; winter; Eucalyptus nitens; tree and stand measurements; clones; climate change; snow; trees; planting; Eucalyptus grandis; stand basal area; forests; South Africa
- Abstract:
- ... Eucalyptus grandis × Eucalyptus nitens (G×N) hybrid clones are selected to combine complimentary characteristics of E. nitens and E. grandis . G×N hybrid clones also have the potential to increase growth rates and provide adaptability to a changing climate. A series of three trials planted across a range of high-productivity, mid-altitude sites in the KwaZulu-Natal midlands was established to test ...
- DOI:
- 10.2989/20702620.2013.820446
-
http://dx.doi.org/10.2989/20702620.2013.820446
- Author:
- Eyles, Alieta; Drake, Paul; Quang, Le Thanh; Bon, Pham Van; Mendham, Daniel; White, Don; Dat, Kieu Tuan; Dung, Pham The; Beadle, Chris
- Source:
- Southern forests 2015 v.77 no.4 pp. 287-296
- ISSN:
- 2070-2639
- Subject:
- Acacia crassicarpa; carbon; dry season; ecophysiology; forests; hybrids; leaf water potential; photosynthesis; plantation forestry; plantations; soil water; stomatal conductance; trees; water uptake; water vapor; wet season; Australia; Vietnam
- Abstract:
- ... Selected tropical Acacia species are used extensively for short-rotation plantation forestry in many parts of Asia and, to a limited degree, in Australia. We explored leaf-level photosynthetic activity and leaf water potential (Ψleaf) of three field-grown Acacia tree species (aged between 7 and 18 months) in contrasting wet–dry tropical plantations in southern Vietnam and northern Australia. Light ...
- DOI:
- 10.2989/20702620.2015.1063030
-
http://dx.doi.org/10.2989/20702620.2015.1063030
- Author:
- Van Bich, Nguyen; Mendham, Daniel; Evans, Katherine J; Dong, Tran Lam; Hai, Vo Dai; Van Thanh, Hoang; Mohammed, Caroline L
- Source:
- Southern forests 2019 v.81 no.3 pp. 201-212
- ISSN:
- 2070-2639
- Subject:
- Acacia mangium; Eucalyptus pellita; Eucalyptus urophylla; branches; burning; fertilizer rates; forest plantations; forests; growers; harvesting; hybrids; landscapes; leaf area index; nitrogen; nutrients; phosphorus; phosphorus fertilizers; plant residues; planting; potassium; runoff; seedlings; soil; soil erosion; survival rate; termite control; trees; weeds; Vietnam
- Abstract:
- ... Forest plantation growers in Vietnam commonly burn residues after harvesting and often apply suboptimal amounts of nutrients during plantation establishment. We examined whether the retention of forest residue, and application of phosphorus fertiliser at higher rates, can increase rates of growth. A factorial combination of residue management (burning vs retention) and phosphorus fertiliser applic ...
- DOI:
- 10.2989/20702620.2018.1555940
-
http://dx.doi.org/10.2989/20702620.2018.1555940