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... In forest ecosystems, fungi are the key actors in wood decay. They have the capability to degrade lignified substrates and the woody biomass of coniferous forests, with brown rot fungi being common colonizers. Brown rots are typically involved in the earliest phase of lignocellulose breakdown, which therefore influences colonization by other microorganisms. However, few studies have focused on the ...
... Forests in the upper continental montane zone are important ecotones between lowland and subalpine forest ecosystems. A thorough understanding of the past vegetation dynamics at mid elevation is crucial to assess past and future altitudinal range shifts of tree species in response to climate change. Lake sediments from Lac de Champex (1,467 m a.s.l.), a small lake in the Canton Valais in the Centr ...
Berit Marie Blomstrand; Heidi Larsen Enemark; Håvard Steinshamn; Inga Marie Aasen; Juni Rosann Engelien Johanssen; Spiridoula Athanasiadou; Stig Milan Thamsborg; Kristin Marie Sørheim
... BACKGROUND: Eimeria spp. are widespread apicomplexan parasites known to cause coccidiosis in livestock, resulting in reduced animal welfare and productivity, particularly in sheep. The treatment options are limited, and there is an emerging development of resistance against registered pharmaceuticals. Spruce bark is rich in plant secondary metabolites (PSM), such as condensed tannins, which are bi ...
... In the last decades, the structural and functional role of standing dead trees and lying deadwood in forests has been widely recognized by scientific community and forest managers. However, a large amount of deadwood in forests can have negative impacts on recreational forests by reducing the aesthetic value and site attractiveness. The aims of the present study are to investigate whether deadwood ...
Zdeněk Vacek; Lukáš Bílek; Jiří Remeš; Stanislav Vacek; Jan Cukor; Josef Gallo; Václav Šimůnek; Daniel Bulušek; Jakub Brichta; Oldřich Vacek; Ondřej Drábek; Daniel Zahradník
Acer pseudoplatanus; Alnus glutinosa; Larix decidua; Picea abies; Populus nigra; abandoned land; afforestation; bark; basalt; biomass; carbon; carbon sequestration; climate change; drought; forests; groundwater; mountains; risk; temperature; tree damage; trees; Central European region; Czech Republic
Abstract:
... KEYMESSAGE: Populus nigra and Picea abies achieved the largest standing volume at 50 years of age in basalt mountainous sites in Central Europe, but they also present the highest risk in the case of rising temperature and drought extremes. The most climatically resistant tree species were Larix decidua and Alnus glutinosa, which had a lower productivity in the current conditions. Based on carbon s ...
... As the “front line” of coping with global climate change, the alpine treeline has been widely investigated by ecologists for a long time. In this study, 3180 articles in the Web of Science database from 2000 to 2021 are visualized by using CiteSpace bibliometric software from the perspectives of basic literature features (volume, discipline, journal, author, institution, and country), academic lay ...
Larix decidua; Picea abies; cambium; carbon; climate; drought; environment; forests; rehydration; sap flow; soil water; starch; summer; tree growth; treeline; trees; turgor; water stress; water use efficiency; xylem
Abstract:
... Despite recent advances in our understanding of drought impacts on tree functioning, we lack knowledge about the dynamic responses of mature trees to recurrent drought stress. At a subalpine forest site, we assessed the effects of three years of recurrent experimental summer drought on tree growth and water relations of Larix decidua Mill. and Picea abies (L. Karst.), two common European conifers ...
... BACKGROUND: Eurasian spruce bark beetles (Ips typographus) use both attractant and anti‐attractant semiochemicals to find suitable mature host trees. Trans‐4‐thujanol is abundant in young, unsuitable spruce trees. Electrophysiological studies have demonstrated its high activity levels, but field data are lacking. RESULTS: Enantioselective GC–MS analysis showed that only (1R,4S)‐(+)‐trans‐4‐thujano ...
... Tree mortality plays a vital role in the accuracy of growth and yield calculations. Economic loss caused by Heterobasidion sp. and Armillaria sp. is a common issue in forestry. Estonian forests, which are mostly managed, are susceptible to fungal infection due to freshly exposed wood surfaces, such as stumps and mechanical wounds. External signs of infection are often scarce and may lead to incorr ...
... Plant growth is almost always limited by light availability and competition. However, plants are generally plastic and can change their morphology and biomass allocation to optimize growth under suboptimal conditions. We set up a controlled pot experiment with three light availability levels (10%, 20%, and 50%) to study the effect of light and competition on the biomass allocation and leaf morphol ...
... The increasing trend of afforestation is described in almost all European countries, however, the knowledge of the growth parameters of particular tree species on abandoned agricultural land is still incomplete. Therefore, the characteristics of young forest stands which are afforested with 5 native tree species (Norway spruce, European beech, English oak, sycamore maple, and small-leaved lime) we ...
... Wood permeability is a macroscopic property resulting from complex pathways at the cellular level. In this study, high-resolution X-ray CT scans were performed during longitudinal imbibition in Norway spruce to investigate the role of wood rays and tracheids network in liquid migration. A customized setup was designed to maintain the bottom face of a wooden cylinder in contact with water, without ...
... Carbon (C) exuded via roots is proposed to increase under drought and facilitate important ecosystem functions. However, it is unknown how exudate quantities relate to the total C budget of a drought‐stressed tree, that is, how much of net‐C assimilation is allocated to exudation at the tree level. We calculated the proportion of daily C assimilation allocated to root exudation during early summer ...
... Stable isotope approaches are widely applied in plant science and many improvements made in the field focus on the analysis of specific components of plant tissues. Although technical developments have been very beneficial, sample collection and preparation are still very time and labor-consuming. The main objective of this study was to create a qualitative dataset of alpha-cellulose content of le ...
... In order to ensure sufficient food resources for a constantly growing human population, new technologies (e.g., cold plasma technologies) are being developed for increasing the germination and seedling growth without negative effects on the environment. Pinaceae species are considered a natural source of antioxidant compounds and are valued for their pharmaceutical and nutraceutical properties. In ...
Fagus sylvatica subsp. sylvatica; Picea abies; Pseudotsuga menziesii; aboveground biomass; biomass production; community development; dominant species; intraspecific competition; mortality; plant communities; shade tolerance; stand development; temperate forests; trees
Abstract:
... Experiments manipulating diversity in both forests and grasslands have often observed a positive diversity–productivity relationship (DPR) which tends to strengthen during plant community development. This pattern is generally attributed to an increase in niche complementarity or facilitation. Most analyses do not examine species dominance and density, which also change over time. Moreover, how ne ...
... Based on the measurements of the biomass of the stems of 3 699 trees of Scots pine, Norway spruce, and silver birch in Europe since 1950, it has been shown that these tree species show a reduction in biomass and wood density. These results contradict the fact that the volume of wood is directly converted to biomass using the historical values of the conversion rates. From 1950 to 2020 the biomass ...
... It is found that the existing problem of wood resources can be partially solved by attracting additional reserves, in particular, stump-root wood (SRW). In order to apply SRW in woodworking and to fill the scientific base with indicators of the macro- and microstructures of the stump-root systems of individual species, studies were carried out on the main characteristics that are decisive for usin ...
Picea abies; deformation; forests; heat transfer; meteorology; sap flow; wood
Abstract:
... Heat Field Deformation (HFD) is a widely used method to measure sap flow of trees based on empirical relationships between heat transfer within tree stems and the sap flow rates. As an alternative, the Linear Heat Balance (LHB) method implements the same instrumental configuration as HFD but calculates the sap flow rates using analytical equations that are derived from fundamental conduction-conve ...
Abies alba; Fagus sylvatica subsp. sylvatica; Picea abies; Pseudotsuga menziesii; administrative management; canopy; ecosystems; forests; light transmission; natural regeneration; summer; tree and stand measurements; understory; ungulates; vegetation cover; Switzerland
Abstract:
... Douglas fir (Pseudotsuga menziesii) has regenerated naturally in European forests since the middle of the 20ᵗʰ century. Some cases of an invasive character of the species have been reported under specific site conditions, but systematic data on the extent of natural regeneration and spread of Douglas fir across different forest communities are largely lacking. Due to its potential tolerance to inc ...
Ahto Kangur; Kristi Nigul; Allar Padari; Andres Kiviste; Henn Korjus; Diana Laarmann; Eneli Põldveer; Risto Mitt; Lee E. Frelich; Kalev Jõgiste; John A. Stanturf; Teele Paluots; Vivika Kängsepp; Harli Jürgenson; Steffen M. Noe; Allan Sims; Marek Metslaid
Alnus glutinosa; Betula; Picea abies; carbon; old-growth forests; surface area; tree height; trees; Estonia
Abstract:
... The study area is in the Järvselja Training and Experimental Forest Centre, Estonia. The conservation of Järvselja old-growth forest started in 1924 when the area was excluded from all management activities and left to natural development. The aim of this study is to analyse the methods for calculating single tree height, tree stem lateral surface area, tree volume and carbon content for standing ...
... The main aim of the research was to evaluate changes in contents of essential oils and pigments in Norway spruce needles as affected by short-term storage under different conditions as well as to assess the potential resources of winter-harvested foliage obtainable from by-products of forest felling as a natural source of these bioactives. One- and two-year-old needles were taken for the analyses ...
... The damage to trees that is caused by ungulate species is a natural result of their presence in ecosystems. High densities of ungulates may have a negative effect on biodiversity and the regeneration and survival of trees. The aim of this study was to identify the factors that affect the probability of the occurrence of damage in forest stands as a result of the presence of European bison (Bison b ...
Picea abies; doves; forest health; forest industries; forests; health status; heartwood; lidar; remote sensing; satellites; spatial data; stem rot; support vector machines; tree crown; Norway
Abstract:
... Norway spruce pathogenic fungi causing root, butt and stem rot represent a substantial problem for the forest sector in many countries. Early detection of rot presence is important for efficient management of the forest resources but due to its nature, which does not generate evident exterior signs, it is very difficult to detect without invasive measurements. Remote sensing has been widely used t ...
... The long-term impacts of summer drought and high temperatures on xylem traits of conifers are scarcely investigated, even though such traits can play an important role in determining xylem functional performance and wood properties under the ongoing climate change. To investigate how different species are expected to react to climate change, especially summer drought, we studied the xylem plastici ...
Jan Krejza; Matthias Haeni; Eva Darenova; Lenka Foltýnová; Marek Fajstavr; Jan Světlík; Ondřej Nezval; Pavel Bednář; Ladislav Šigut; Petr Horáček; Roman Zweifel
... Although forests store significant amounts of carbon in tree stems, the extent to which stem growth depends on carbon assimilation and environmental factors is poorly understood. In this study, gross primary productivity (GPP) and net ecosystem productivity (NEP) are compared for the first time at daily resolution with stem carbon allocation (SCA) in a spruce forest. We found substantial differenc ...
Picea abies; air temperature; altitude; autumn; case studies; climatic factors; growth rings; summer; temperature inversion; trees; weather; winter; Carpathian region; Romania
Abstract:
... One of the most important proxy archives for past climate variation is tree rings. Tree-ring parameters offer valuable knowledge regarding how trees respond and adapt to environmental changes. Trees encode all environmental changes in different tree-ring parameters. In this study, we analyzed how air temperature is encoded in different Norway spruce tree-ring proxies along an altitude gradient in ...
... One of the main ideas of non-native tree species introduction into forest stands is to replace declining native species. The same is also valid for industry; the wood of native species should be replaced by a wood of the same or even better quality. Douglas-fir is often compared to other coniferous tree species based on its production. This study compared Douglas-fir wood properties with European ...
Picea abies; carbon; carbon sequestration; cell growth; climate; drought; forests; growth rings; hydrologic cycle; summer; trees; water stress; water use efficiency; wood
Abstract:
... The impact of climate extremes on forest ecosystems is poorly understood but important for predicting carbon and water cycle feedbacks to climate. Some knowledge gaps still remain regarding how drought‐related adjustments in intra‐annual tree‐ring characteristics directly impact tree carbon and water use. In this study we quantified the impact of an extreme summer drought on the water‐use efficien ...
... Consequences of interactions between ectomycorrhizal fungi (EcMF) and non‐mycorrhizal rhizosphere fungi (NMRF) for plant carbon (C) allocation belowground and nutrient cycling in soil remain unknown. To address this topic, we performed a mesocosm study with Norway spruce seedlings [Picea abies (L.) H. Karst] inoculated with EcMF, NMRF, or a mixture of both (MIX). ¹⁴CO₂ pulse labelling of spruce wa ...
Larix sibirica; Picea abies; Picea mariana; Pinus contorta var. latifolia; conifers; field experimentation; latitude; models; mountains; subarctic climates; survival rate; topography; Sweden
Abstract:
... Tree development is affected by different factors including topographic features. The effect could be even more complex in harsh environments such as in the northwest of Sweden. In this study, we analyzed the effect of aspect-slope on the development up to the age of 34 years of five species: black spruce, lodgepole pine, Norway spruce, Siberian larch and Scots pine. The species were planted in a ...
... A field study was conducted to investigate the effect of forest-edge cutting on the transpiration rates of individual Picea abies (L.) H. Karst. trees regarding their susceptibility to bark-beetle Ips typographus (L.) infestation. The study period, spanning from 2019 to 2020, involved two treatment plots (Tₚ) and two control plots (Cₚ). Sap-flow sensors working according to the trunk-heat-balance ...
... Wildfire disturbance is important for tree regeneration in boreal ecosystems. A considerable amount of literature has been published on how wildfires affect boreal forest regeneration. However, we lack understanding about how soil-mediated effects of fire disturbance on seedlings occur via soil abiotic properties versus soil biota. We collected soil from stands with three different severities of b ...
... Studies of tree species effects on soils have revealed a significant impact on soil organic carbon (SOC) stocks and the carbon (C) distribution between forest floor and mineral soil, but the underlying mechanisms including the roles of litter traits, soil properties, and microbiome remain unclear. To address this challenge, we tested the effect of six common European tree species on the quality an ...
... This paper presents electrical resistance characteristics of ThermoWood® Thermo-D Norway spruce for wood moisture content measurements below fibre saturation point. Electrical resistance along the grain of small clear wood specimens was measured at various moisture content levels of ~ 4–15% for thermally modified and ~ 5–25% for unmodified spruce. The results show that—similar to unmodified wood—t ...
... During the growth season, northern forests in Sweden daily receive more hours of far‐red (FR)‐enriched light or twilight (shade) as compared to southern forests. Norway spruce (shade‐tolerant) are adapted to latitudinal variation in twilight characterized by a northward increase in FR requirement to maintain growth. Shade is a stressful condition that affects plant growth and increases plant's sus ...
... Short-term trials on cultivated soil were planted with families of Norway spruce that had shown epigenetic memory effects in early tests up to age two years. Measurements and assessments were made of phenology traits, tree heights and stem defects until age 16 years in these trials. The memory effects of the temperature conditions during embryo development and seed maturation were confirmed for th ...
... Woody debris is found in all habitats of the land-sea continuum. While isolated experimental studies of wood degradation exist, few programs have observed the dynamics of wood degradation, in situ across this gradient. Since 2014, we have been conducting a series of long-term observations of wood decay in three characteristic areas of a Mediterranean Sea coastal watershed: forest leaf litter (‘For ...
Picea abies; case studies; forests; research; stand age; tree and stand measurements; tree growth; trees; Sweden
Abstract:
... To develop recommendations for tree selection in Continuous Cover Forestry (CCF), access to valid tools for simulating growth at individual tree-level is necessary. To assist efforts to develop such tools, in this study, long-term observation data from two uneven-sized Norway spruce plots in southern Sweden are used to evaluate old and new individual-tree growth models (two established Swedish mod ...
... This study investigates potential influence of urban trees on black carbon (BC) removal by Norway spruce and silver birch along with the BC formation, mass concentration in air, and source apportionment. The main sources of BC in urban areas are transport, household and industry. BC concentrations monitored in urban background station in Vilnius (Lithuania) showed that biomass burning was a signif ...
Picea abies; forests; prediction; tree growth; Norway
Abstract:
... Using periodic measurements from permanent plots in non-thinned and thinned Norway spruce (Picea abies (L.) H. Karst.) stands in Norway, individual-tree growth models were developed to predict annual diameter increment, height increment, and height to crown base increment. Based on long-term data across a range of thinning regimes and stand conditions, alternative approaches for modeling response ...
... This paper describes results and analysis of experiment of compression behavior parallel to grain of glulam (Norway Spruce, Japanese cedar, and Japanese cypress), especially in damage zones near loading plates and joints. To investigate the influence factors of physical properties and the mechanism of the damage zone near the loading plates or the joints, compression tests on 90 specimens and surf ...
... Experimental evidence that nonstomatal limitations to photosynthesis (NSLs) correlate with leaf sugar and/or leaf water status suggests the possibility that stomata adjust to maximise photosynthesis through a trade‐off between leaf CO₂ supply and NSLs, potentially involving source–sink interactions. However, the mechanisms regulating NSLs and sink strength, as well as their implications for stomat ...
... The boreal–alpine treeline is a fine-spatial heterogeneous ecotone with small single trees, tree clusters and open snow surfaces during wintertime. Due to climate change and decreased grazing of domestic animals, the treelines expand both upwards into the mountains and northwards into the tundra. To quantify and understand the biophysical radiative climatic feedback effect due to this expansion, i ...
... Climate change is producing threats to forests’ capacity of regulating water regimes. Therefore, thinning strategies can be applied to mitigate climate change impacts more efficiently by providing more spaces for trees to utilize resources e.g., water and nutrients. This study examined the effects of different thinning intensities and intervals on water characteristics and biomass growth of a 75-y ...
... Natural regeneration of European beech (Fagus sylvatica) and Norway spruce (Picea abies) plays a crucial role in the future of many European mountain forests. It is affected by various soil and stand-related factors whose relative importance, especially in mixed stands, is still not known. In this study, we assessed the importance of stand composition, soil wetness, disturbances and different micr ...
Ips typographus; Picea abies; administrative management; air; bark; bark beetle infestations; edge effects; field experimentation; forests; microclimate; monoterpenoids; olfactometry; phloem; sap flow; soil water potential; spring; volatile organic compounds; Central European region; Norway
Abstract:
... Mass outbreaks of the European spruce bark beetle, Ips typographus, have caused devastating damage to Norway spruce-dominated forests in Central Europe. Biotic and abiotic natural disturbances as well as logging activities promote the fragmentation of forest stands, further increasing their susceptibility to damaging events. The creation of forest edges abruptly alters microclimatic conditions, su ...
... During autocatalyzed steam explosion of lignocellulose, polysaccharides in the cell wall are hydrolyzed and dehydrated to form various furaldehydes. In addition to furfural, 5-methylfurfural and 2-acetylfuran were identified in condensates from autocatalyzed steam explosion of Scandinavian softwood (Norway spruce, Picea abies). The presence of 5-methylfurfural can be explained by an acid-catalyzed ...
... In many spruce stands, trees are frequently attacked by the pathogen Heterobasidion parviporum, albeit without visible symptoms in the crown. In the present work, the results of the presence of stem rot, assessed by PICUS Sonic Tomography, and the fungal biota on trees and stumps in eight plots in the Puszcza Borecka Forest are described. The plots were located in stands on original forest soil (4 ...
... The aim of this study was the development of a methodical processing line for estimating the log’s volume from scanning logs using a long-range high-speed personal laser scanner (PLS) GeoSLAM ZEB HORIZON and simultaneous localization and mapping (SLAM) technology in an open-source software framework of Cloud Compare. Additionally, the accuracy and precision of using PLS and the suggested method wh ...
... Since 2008, spruce bud blight (Gemmamyces piceae (Borthw.) Casagr.) has been spreading epidemically in forest stands of the Czech Republic’s Ore Mountains. This fungus, with a disjunct Holarctic range, injures buds, especially of Colorado blue spruce (Picea pungens Engelm.). Damaged buds do not sprout, and, in case of a stronger attack, the tree does not recover its assimilation apparatus and may ...
... The sessile oak is a broadleaved tree species of great ecological and silvicultural importance. Oaks are the second most widespread deciduous tree species in the Czech Republic, and ongoing climate change negatively affects the abundant and often monocultural Norway spruce. Therefore, a proportional increase of more resilient tree species such as sessile oak has emerged. This study aimed to depict ...
... Ips duplicatus (Sahlberg, 1836), Xylosandrus germanus (Blandford, 1894) and Neoclytus acuminatus (Fabricius, 1775) are invasive species reported in Romania, but their current distribution is poorly known. The research aim was to provide new information on this issue. A survey was conducted over the period 2015–2017 in 82 locations, using flight-interception traps and bottle traps, baited with diff ...
Picea abies; administrative management; community structure; dead wood; forest management; forests; lichens; linear models; species richness; wood; Finland
Abstract:
... Lichens have a vital role in forest ecosystems and they are a threatened group in boreal forests. However, the conservation ecology of the total lichen community has very rarely been studied. Here we studied lichen species and communities, including macrolichens (=foliose and fruticose growth forms) and rarely studied crustose lichens, on decaying wood in boreal spruce-dominated forests in Finland ...
... Environmental pollution, greenhouse gas emissions, depletion of fossil fuels, and a growing population have sparked a search for new and renewable energy sources such as biodiesel. The use of waste or residues as substrates for microbial growth can favor the implementation of a biorefinery concept with reduced environmental footprint. Cyanobacteria constitute microorganisms with enhanced ability t ...
Kyohsuke Hikino; Jasmin Danzberger; Vincent P. Riedel; Romy Rehschuh; Nadine K. Ruehr; Benjamin D. Hesse; Marco M. Lehmann; Franz Buegger; Fabian Weikl; Karin Pritsch; Thorsten E. E. Grams
... Under ongoing global climate change, drought periods are predicted to increase in frequency and intensity in the future. Under these circumstances, it is crucial for tree's survival to recover their restricted functionalities quickly after drought release. To elucidate the recovery of carbon (C) transport rates in c. 70‐year‐old Norway spruce (Picea abies [L.] KARST.) after 5 years of recurrent su ...
... Home-field advantage (HFA) encompasses all the processes leading to faster litter decomposition in the ‘home’ environment compared to that of ‘away’ environments. To determine the occurrence of HFA in a forest and adjacent clear-cut, we set up a reciprocal litter decomposition experiment within the forest and clear-cut for two soil types (Cambisols and Gleysols) in temperate Germany. The forest wa ...
Pavel P. Pashkovskiy; Radomira Vankova; Ilya E. Zlobin; Petre Dobrev; Alexander V. Kartashov; Alexandra I. Ivanova; Valery P. Ivanov; Sergey I. Marchenko; Dmitry I. Nartov; Yury V. Ivanov; Vladimir V. Kuznetsov
Picea abies; Russia; abscisic acid; auxins; biosynthesis; cytokinins; forests; jasmonic acid; salicylic acid; water shortages; water stress
Abstract:
... Water stress has a continuing major negative impact on global forest performance, which necessitates to understand how plants coordinate multiple physiological responses to adverse conditions. Therefore, we studied the effects of short-term and long-term water deficit on the biosynthesis and signalling of phytohormones, especially abscisic acid (ABA), in current-year needles of Scots pine and Norw ...
Picea abies; air; climate; fungal spores; fungi; genetic similarity; genotype; intraspecific variation; phenotype; tree and stand measurements; trees
Abstract:
... The factors shaping the composition of the tree mycobiome are still under investigation. We tested the effects of host genotype, site, host phenotypic traits, and air fungal spore communities on the assembly of the fungi inhabiting Norway spruce needles. We used Norway spruce clones and spore traps within the collection sites and characterized both needle and air mycobiome communities by high‐thro ...
... Since 2014, forestry in the Czech Republic has been significantly affected by a bark beetle outbreak. The volume of infested trees has exceeded processing capacity and dead standing spruce (Picea abies) remain in the forest stands, even for several years. What should be done with this bark beetle wood? Is it necessary to harvest it in order to preserve the basic mechanical and physical properties? ...
... Charcoal from archaeological contexts differs from off-site pollen samples as it is mainly a product of intentional human action. As such, analysis of charcoal from excavations is a valuable addition to studies of past vegetation and the interaction between humans and the environment. In this paper, we use a dataset consisting of 6186 dated tree species samples from 1239 archaeological sites as a ...
... CONTEXT: Forest harvest removal may cause nutrient depletion of soils, when removal of essential nutrients, including nitrogen (N), phosphorus (P), sulphur (S), calcium (Ca), potassium (K) and magnesium (Mg) exceeds their net input by deposition and weImpacts of acid atmospheric deposition on woodland athering minus leaching. Nutrient removal by harvest depends on tree species and the harvesting m ...
Václav Treml; Jan Tumajer; Kateřina Jandová; Filip Oulehle; Miloš Rydval; Vojtěch Čada; Kerstin Treydte; Jiří Mašek; Lenka Vondrovicová; Zuzana Lhotáková; Miroslav Svoboda
Picea abies; Pinus sylvestris; air pollution; biomass production; cambium; carbon; carbon dioxide; climate; drought; forests; growth rings; leaves; nitrogen; nutrient availability; stem elongation; stomatal movement; sulfur; time series analysis; transpiration; tree growth; trees; water use efficiency; wood; Central European region
Abstract:
... Climate controls forest biomass production through direct effects on cambial activity and indirectly through interactions with CO₂, air pollution, and nutrient availability. The atmospheric concentration of CO₂, sulfur and nitrogen deposition can also exert a significant indirect control on wood formation since these factors influence the stomatal regulation of transpiration and carbon uptake, tha ...
... This article deals with the effect of alternating lower (freezing) and higher (heating) temperatures on the static bending characteristics of glued Norway spruce (Picea abies (L.) H. Karst.) and European larch (Larix decidua Mill.) wood. Two types of wood, PUR (polyurethane), and EPI (emulsion polymer isocyanate), were used for the experiment. The thermal loading of glued wood was carried out at t ...
Fagus sylvatica subsp. sylvatica; Picea abies; decline; drought; forest ecology; forests; fructification; ozone; pollution; soil water content; sustainable forestry; time series analysis; tree growth; water stress; Germany
Abstract:
... Studying the effect of surface ozone (O₃) and water stress on tree growth is important for planning sustainable forest management and forest ecology. In the present study, a 22-year long time series (1998–2019) on basal area increment (BAI) and fructification severity of European beech (Fagus sylvatica L.) and Norway spruce (Picea abies (L.) H.Karst.) at five forest sites in Western Germany (Rhine ...
... One method for estimating the solid wood content in a stack involves using conversion factors and multiplying these by the measured gross volume. The conversion factors can vary depending on several log and stack parameters. The aim of this study was to analyze eleven parameters using a 3D simulation model based on 541 measured logs of Norway spruce. To this end, 50 data sets were created from mea ...
... Currently, a change in the species composition of the Białowieża Forest, eastern Poland, is occurring. Parallel to the dying of spruce (Picea abies L. Karst.), caused by Ips typographus (L.), there is a spread of deciduous tree species, among which hornbeam (Carpinus betulus L.) is the most active. Against the background of climate change, it is of interest to consider the possibility of reintrodu ...
... Spruce–fir (Picea–Abies) forests of the North American Acadian Forest Region are at risk of disappearing from the northeastern United States and Canada due to climate change. Species distribution models (SDMs) have been used to predict changes in this critical transitional ecosystem in the past, but none have addressed how seasonal patterns of temperature and precipitation interact to influence tr ...
... The aim of this study was to examine the influence of the oxygen atmosphere on hydrothermal fractionation of Norway spruce at 130–160 °C and 1–50 bar. The quantitative kinetics and qualitative aspects of the hemicellulose extraction were studied. The results show that the fractionation can be considerably enhanced already by low concentrations of oxygen. The ratio of lignin to hemicellulose extrac ...
Heterobasidion annosum; Picea abies; Pinus sylvestris; carbon; defoliation; dormancy; drought; environment; gas exchange; mortality; pathogens; sapwood; starch; turgor; water content; water stress
Abstract:
... Pathogenic diseases frequently occur in drought‐stressed trees. However, their contribution to the process of drought‐induced mortality is poorly understood. We combined drought and stem inoculation treatments to study the physiological processes leading to drought‐induced mortality in Norway spruce (Picea abies) and Scots pine (Pinus sylvestris) saplings infected with Heterobasidion annosum s.s. ...
... Crop diseases may be affected by landscape composition, but limited quantitative information is available. We studied the effects of landscape factors on the incidence of the psyllid-transmitted bacterium Candidatus Liberibacter solanacearum (CLso) haplotype C in carrots in Finland. Samples were collected from 104 carrot fields in 2013 and 2014. The relationship between CLso incidence and landscap ...
... The dendrogeomorphic dating of past landslides can be limited by the speed or magnitude of movements, as they are sometimes too small to induce growth responses in trees standing on unstable slopes. As a result, movements of low magnitude are generally assumed to remain undetectable in standard macroscopic analysis of growth disturbances in tree-ring series. To close this gap and to enlarge the su ...
Nataliya Korolyova; Arne Buechling; Renata Ďuračiová; Khodabakhsh Zabihi; Marek Turčáni; Miroslav Svoboda; Jaromír Bláha; Kelly Swarts; Miroslav Poláček; Jaromir Hradecký; Jaroslav Červenka; Pavel Němčák; Fredrik Schlyter; Rastislav Jakuš
Ips typographus; Picea abies; bark; bark beetles; carbon; climate change; data collection; dry environmental conditions; forests; intraspecific competition; landscapes; life history; meteorology; photosynthesis; probability; Central European region; Europe
Abstract:
... Plant traits are an expression of strategic tradeoffs in plant performance that determine variation in allocation of finite resources to alternate physiological functions. Climate factors interact with plant traits to mediate tree survival. This study investigated survival dynamics in Norway spruce (Picea abies) in relation to tree-level morphological traits during a prolonged multi-year outbreak ...
Tobias Walter Miller; Dominik Florian Stangler; Elena Larysch; Harald Honer; Heike Puhlmann; Dirk Schindler; Christopher Jung; Thomas Seifert; Andreas Rigling; Hans-Peter Kahle
... Severe drought events negatively affect tree growth and often cause legacy effects, expressed by smaller tree rings in the post-drought recovery years. While the pattern of reduced tree-ring widths is frequently described the processes underlying such legacy effects, i.e., whether it is due to shorter growth periods or lower growth rates, remains unclear and is investigated in this study. To eluci ...
Picea abies; forest ecosystems; forests; growth curves; growth rings; longevity; social welfare; tree crown; tree growth; Germany
Abstract:
... KEY MESSAGE: Structural characteristics of tree crowns obtained by TLidar scanning can be used for estimating the course of the stem diameter growth in the past. To improve human well-being through sustainable management of ecosystems, particular attention is given to the structures, functions, and services of forest trees and stands. The classical timber provision has become only one of many othe ...
Veiko Uri; Mai Kukumägi; Jürgen Aosaar; Mats Varik; Hardo Becker; Kristiina Aun; Maris Nikopensius; Marek Uri; Mikko Buht; Agnes Sepaste; Allar Padari; Endla Asi; Allan Sims; Kalle Karoles
Betula pendula; Betula pubescens; Picea abies; Pinus sylvestris; administrative management; canopy; carbon sequestration; forest ecosystems; plant litter; soil carbon; soil fertility; stand age; stand basal area; trees; Estonia
Abstract:
... Canopy litterfall represents an essential aboveground flux in every forest ecosystem, affecting soil carbon and nutrient dynamics as well as soil fertility. However, despite the important role of the canopy litter flux in ecosysteḿs functioning and carbon sequestration, litterfall dynamics is still poorly studied in hemiboreal forests. The main aim of the current study was to estimate average annu ...
... We have reviewed information on early-, late- and limit-value decomposition stages for litter of Norway spruce (Picea abies) and Scots pine (Pinus silvestris). This synthesis covers c 16 studies/papers made along a climatic gradient; range in mean annual temperature (MAT) from −1 to +7 °C and mean annual precipitation (MAP) from 425 to 1070 mm. Scots pine has an early stage dominated by carbohydra ...
... Mast flowering and seeding is a well-known reproductive strategy of tree species with many ecological consequences regulating synchronous year-to-year flowering intensity variations at the population level. In contrast to flowering timing, the effects of climate change on flowering intensity across space, time, and species are largely unexplored. In this study, a long-term data set on flowering in ...
Picea abies; administrative management; conifers; forest ecology; forest types; income; pulpwood; sawlogs; shade tolerance; stand composition; stand structure; trees; Maine
Abstract:
... Pre-commercial (PCT) and commercial thinning (CT) are important silvicultural tools applied to spruce-fir (Picea-Abies) forests, a key forest type in the northeastern portion of North America. However, the long-term influences of CT, particularly when combined with PCT, are relatively unknown, except for a few specific locations in the region. Utilizing the repeated measurements from replicated ex ...
Tobias Walter Miller; Dominik Florian Stangler; Elena Larysch; Harald Honer; Thomas Seifert; Heike Puhlmann; Georg von Arx; Patrick Fonti; Marina V. Fonti; Cyrille B.K. Rathgeber; Hans-Peter Kahle
... Climate change is expected to have significant impacts on European forests, causing changes in the geographic distribution of species and ecosystem functioning. Douglas fir (Pseudotsuga menziesii) and silver fir (Abies alba) are considered potential alternatives to the drought endangered Norway spruce (Picea abies). However, still little is known about differences in their intra-annual growth dyna ...
... Storage of woody biomass in large wood chip piles is unavoidable for biotechnological applications, but comes along with considerable biomass-, energy- and thus, economic losses due to exothermic reactions and microbial degradation. The homogeneous amendment of the storage piles with an alkaline stabilization agent, calcium hydroxide (Ca(OH)₂), was found to decrease dry matter loss in Picea abies; ...
... As the sawmill industry is moving towards thinner bandsaws for higher yields, it is important to study the cutting force in more detail. The cutting force can be split into two zones. Zone I concerns the force on the major cutting edge as well as the friction force on the major first flank. Zone II considers the forces on the minor cutting edges as well as the friction forces on the minor first fl ...
Picea abies; air temperature; bark beetles; drought; forests; growth rings; remote sensing; trees; Central European region; Czech Republic
Abstract:
... Presently, the forests of one of the most economically important tree species in Europe—Norway spruce [Picea abies (L.) Karst.]—have been disrupted and are in rapid decline due to a combination of several natural factors: extreme drought, heatwaves, and secondary damage caused by bark beetle outbreaks. The vulnerability of these forests has increased considerably over the past decade, and remote s ...
Fagus sylvatica subsp. sylvatica; Picea abies; Pinus sylvestris; Quercus petraea; administrative management; bioclimate; ecosystems; forest ecology; site index; soil; stand age; stand density; trees; water supply; Central European region; Germany
Abstract:
... Tree species mixtures can overyield monospecific stands and provide many other advantageous regulating and provisioning ecosystem services. So far, the effect of mixing on growth were mostly described at the individual tree level or cumulatively at the stand level. How overyielding emerges from the mixing pattern, how it is modulated by the current environmental conditions, and how overyielding de ...
Larix decidua; Larix sibirica; Picea abies; Pinus contorta var. latifolia; Pinus sylvestris; administrative management; carbon sequestration; forest ecology; nonlinear mixed effects models; prediction; site index; stand density; trees; Sweden
Abstract:
... Information on forest site productivity is a key component to assess the carbon sequestration potential of boreal forests. While site index (SI) is commonly used to indicate forest site productivity, expressions of SI in the form of yield capacity (potential maximum mean annual volume increment) is desirable since volume yield is central to the economic and ecological analyses of a given species a ...
... Root and stem rot of conifer trees caused by Heterobasidion annosum species complex leads to huge economic losses in Europe, yet not much is known about the molecular and chemical basis for host resistance. To identify inherent chemical or molecular markers in clones found to be either resistant or susceptible, we sampled needle tissues of all the clones before pathogen inoculation. We conducted a ...
... Monitoring of pollution in the vicinity of roads connected to winter road maintenance is one of the important tools for optimising winter maintenance technology and reducing its environmental impact. The aim of this study was to determine the relationship between winter road maintenance and the increased concentration of sodium ion to characterise the harm caused by the de-icing agents on selected ...
Betula pubescens; Picea abies; climate; drainage; forest management; pH; peat; peatlands; temperature; tree growth; trees
Abstract:
... Peatland drainage based on ditch systems is a widely used forestry management practice in the boreal and hemiboreal forests to improve tree growth. This study investigated the morphological variation in absorptive roots (first- and second-order roots) across the distance gradient from the ditch with four sampling plots (5, 15, 40, and 80 m) in six drained peatland forests dominated by Downy birch ...
Bryoria; Picea abies; Usnea; autumn; biodiversity; boreal forests; climate; color; decline; ecosystems; epiphytes; extinction; forest management; global change; industrial forestry; lichens; nitrogen; rain; regression analysis; stand age; temperature; trees; water storage; winter; Sweden
Abstract:
... Thin, hair‐like lichens (Alectoria, Bryoria, Usnea) form conspicuous epiphyte communities across the boreal biome. These poikilohydric organisms provide important ecosystem functions and are useful indicators of global change. We analyse how environmental drivers influence changes in occurrence and length of these lichens on Norway spruce (Picea abies) over 10 years in managed forests in Sweden us ...
Samuli Junttila; Roope Näsi; Niko Koivumäki; Mohammad Imangholiloo; Ninni Saarinen; Juha Raisio; Markus Holopainen; Hannu Hyyppä; Juha Hyyppä; Päivi Lyytikäinen-Saarenmaa; Mikko Vastaranta; Eija Honkavaara
Picea abies; Scolytidae; bark beetle infestations; climate change; data collection; decline; forestry equipment; multispectral imagery; spring; summer; tree mortality; trees; unmanned aerial vehicles; Finland
Abstract:
... Climate change is increasing pest insects’ ability to reproduce as temperatures rise, resulting in vast tree mortality globally. Early information on pest infestation is urgently needed for timely decisions to mitigate the damage. We investigated the mapping of trees that were in decline due to European spruce bark beetle infestation using multispectral unmanned aerial vehicles (UAV)-based imagery ...
Hacquetia; Picea abies; calcicoles; new order; Carpathian region; Slovakia
Abstract:
... A second version of the syntaxonomical classification of calcareous Norway spruce communities is presented for the region of Slovak Western Carpathians. Recent knowledge on delimitation of natural Norway spruce woodlands in Slovakia is summarized as well. As result, four in Slovakia traditionally recognized associations are distinguished: Seslerio caeruleae-Piceetum on the ecologically most extrem ...
... Forest trees are experiencing increasing frequency and intensity of drought events with climate change. We investigated xylem and phloem traits from mature Fagus sylvatica and Picea abies trees after 5 years of complete exclusion of throughfall precipitation during the growing season. Xylem and phloem anatomy, leaf and branch biomass were analysed along top branches of ~1.5 m lenght in 5 throughfa ...
Barbastella barbastellus; Curculionidae; Ips typographus; Picea abies; bark beetles; niches; plasticity; radio telemetry; trees; Europe
Abstract:
... Białowieża Primeval Forest (BPF, approx. 1700 km²) is an important forest area in Europe from the point of view of the protection of natural diversity. BPF is covered with old mixed tree stands of mostly natural origin. Norway spruce is a tree species in BPF and covers approx. 27% of its area. Between 2012 and 2017 a large outbreak of the bark beetle Ips typographus (Linnaeus, 1758) took place in ...
Brassica napus; Cervus elaphus; Picea abies; administrative management; air temperature; bark; biomass; deer; diet; forage; forest ecology; forestry; nutrient content; nutrient intake; population density; rapeseed; risk; spring; starch; Sweden
Abstract:
... The distribution and population density of red deer (Cervus elaphus) are increasing in several regions of Europe. The deer may cause severe damage in commercial forestry and agriculture. Bark stripping is the main problem in forests, especially on Norway spruce (Picea abies), and is thought to mostly occur during winter when other forage is scarce. It has been suggested that an imbalance in the nu ...
... Organic soils store a large amount of carbon stock, but they are also a large source of greenhouse gas emissions in a forest. Results of previous studies do not provide whole-country representative data of carbon stock in drained fertile organic soil forests in Europe, as the effects of stand age and dominant tree species are significant. Moreover, the growing role of old-growth stands has trigger ...
Picea abies; Picea pungens; Pityogenes chalcographus; Pityophthorus; bark; bark beetles; forest nurseries; reproduction; wind; Central European region
Abstract:
... In this report, we describe a local outbreak of small bark beetles on 4-year-old seedlings of Picea abies in a forest nursery in Central Europe in 2021. In March 2022, 10–50% of the seedlings were “dry” (i.e., with dry and easily broken twigs and with easily peeled bark) in each 4-row bed in the nursery. Half of the dry plants were completely covered by galleries of bark beetles and another 35% of ...
... Increasing knowledge on tree stability in the forest environment has two major objectives: the first is to provide detailed information to help the decision-making processes that aim to maximize the efficiency of localized silvicultural interventions; the second is to provide useful information and safety guidelines for those who operate in these forests. With this aim, the mechanical response of ...
Picea abies; dendroecology; drought; global change; niches; stand establishment; tree growth; Central European region; Germany
Abstract:
... Due to high productivity and past management approaches, the forests of Central Europe are heavily dominated by conifers, even on sites where they do not occur naturally at all. One prominent example is Norway spruce (Picea abies H. Karst.), a species considered particularly vulnerable to severe droughts, especially outside of its ecological niche where it has been widely planted over the past cen ...
Heterobasidion annosum; Partitiviridae; Phlebia gigantea; Picea abies; biological control; biological control agents; fungi; mycoviruses; pathogens; phenotype; root rot; Estonia; Finland
Abstract:
... Coniferous forests, especially Norway spruce (Picea abies L.) stands, are threatened by root rot disease caused by Heterobasidion annosum sensu lato (Fr.) Bref. The basidiomycetous fungus, Phlebiopsis gigantea (Fr.) Donk, is used as a biocontrol agent against this pathogen in several countries. In Estonia, stump treatments are currently conducted using the Rotstop preparation, which consists of a ...
Jørn Henrik Sønstebø; Emiliano Trucchi; Jenni Nordén; Inger Skrede; Otto Miettinen; Sajeet Haridas; Jasmyn Pangilinan; Igor V. Grigoriev; Francis Martin; Håvard Kauserud; Sundy Maurice
... Genome sequencing of spatially distributed individuals sheds light on how evolution structures genetic variation. Populations of Phellopilus nigrolimitatus, a red‐listed wood‐inhabiting fungus associated with old‐growth coniferous forests, have decreased in size over the last century due to a loss of suitable habitats. We assessed the population genetic structure and investigated local adaptation ...