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Betula pendula subsp. mandshurica; Larix sibirica; Picea obovata; Pinus sibirica; Populus; aboveground biomass; allometry; carbon dioxide; equations; forest ecosystems; forest trees; forests; greenhouse gas emissions; inventories; leaves; models; tree and stand measurements; tree height; Mongolia
Abstract:
... Understanding the contribution of forest ecosystems to regulating greenhouse gas emissions and maintaining the atmospheric CO2 balance requires the accurate quantification of above-ground biomass (AGB) at the individual tree species level. The main objective of this study was to develop species-specific allometric equations for the total AGB and various biomass components, including ste ...
Populus; allometry; clones; equations; genomics; hybrid poplars; models; tree and stand measurements; tree height; trees; woody biomass; Midwestern United States
Abstract:
... Allometric biomass equations were developed based on harvests of 198 trees from 15 field sites in the north-central USA, with the trees representing 4 hybrid poplar genomic groups and a total of 11 clones within these groups. Specifically, equations were developed to describe woody (branch + stem) total dry weight (TDW) as a function of diameter at breast height (DBH), along with hypothesis tests ...
Abies; Acer; Picea engelmannii; Pinus ponderosa; Populus; Pseudotsuga menziesii; allometry; altitude; canopy; climate change; databases; drought; ecosystems; forests; hydrologic cycle; regression analysis; sap flow; sapwood; snow; transpiration; tree and stand measurements; tree height; trees; Arizona; New Mexico
Abstract:
... High-elevation, snow-dependent, semiarid ecosystems across southwestern United States are expected to be vulnerable to climate change, including drought and fire, with implications for various aspects of the water cycle. To that end, much less is known about the dynamics of transpiration, an important component of the water cycle across this region. At the individual-tree scale, transpiration is e ...
Betula; Populus; allometry; bioenergy; biomass production; ecosystems; equations; forests; frost; nurse plants; nutrients; overstory; pioneer species; prediction; stand density; trees
Abstract:
... Nurse crops of widely spaced pioneer trees are a silvicultural approach to protect the regeneration of frost sensitive target tree species. If overstorey nurse crops are harvested, they can provide additional short-term benefits through increased biomass production, e.g., for bioenergy. However, the intensification of biomass exports from forests might impact negatively on ecosystem nutrient pools ...
... The developmental variation in stem height with respect to stem diameter is related to a broad range of ecological and evolutionary phenomena in trees, but the underlying genetic basis of this variation remains elusive. We implement a dynamic statistical model, functional mapping, to formulate a general procedure for the computational identification of quantitative trait loci (QTLs) that control s ...
Populus; allometry; canopy; data collection; inventories; leaf area index; leaves; photography; porosity; research; satellites; tree and stand measurements; trees; unmanned aerial vehicles; Italy
Abstract:
... The dataset reports data collected in 38 square (50 x 50m) 0.25 ha plots representative of poplar plantations in Lombardy Region (Northern Italy), which were used to calibrate optical information derived from unmanned aerial vehicle (UAV) and satellite (Sentinel-2) sensors. In each plot, the diameter at breast height was measured using a caliper; height, stem and crown volume of each tree were the ...
... Short rotation coppice culture systems are characterized by a high stool and shoot density, and by rotation durations between 2 and 3 years for species showing an extremely fast growth such as poplar. With the objective to study the long-term biomass production evolution and dynamic of such systems, a high-density plantation with 17 poplar (Populus) clones belonging to six parentages was establish ...
Ghulam Yasin; Shafeeq Ur Rahman; Muhammad Farrakh Nawaz; Ihsan Qadir; Muhammad Zubair; Sadaf Gul; Muhammad Safdar Hussain; Muhammad Zain; Muhammad Athar Khaliq
... Due to higher atmospheric greenhouse gasses concentrations, global warming is undoubtedly the most critical environmental issue that needs an immediate solution. Agroforestry has attained worldwide recognition to cope with this global problem due to its greater potential to sequester atmospheric carbon dioxide along with other ecosystem services, including food security. However, quantitative info ...
plantations; monitoring; allometry; coppicing; Populus deltoides; aboveground biomass; bioenergy; biomass production; Populus trichocarpa; growing season; genotype; Populus maximowiczii; stakeholders; tree mortality; Populus nigra; shoots; Belgium
Abstract:
... Within the global search for renewable energy sources, woody biomass from short rotation coppice (SRC) cultures is a valuable option. So far there is a shortage of large-scale field yield data to support stakeholders. We investigated an operational-scale SRC plantation (POPFULL) with 12 poplar genotypes in Flanders during its first two biennial rotations. By inventorying shoot numbers and diameter ...
... Short-rotation coppice (SRC) will play a major role in meeting the predicted demands for woody biomass, but data on genotype-specific biomass productivity and growth parameters are still largely missing. These data are, however, important for assessing the expected revenue, but also for predicting the choice of harvester. Therefore, an operational SRC with 12 Populus genotypes was yearly monitored ...
... How trees allocate photosynthetic products to primary height growth and secondary radial growth reflects their capacity to best use environmental resources. Despite substantial efforts to explore tree height–diameter relationship empirically and through theoretical modeling, our understanding of the biological mechanisms that govern this phenomenon is still limited. By thinking of stem woody bioma ...
Picea mariana; Pinus banksiana; Populus tremuloides; forest trees; understory; canopy; boreal forests; forest ecology; fire ecology; leaf area index; allometry; chronosequences; tree age; stand characteristics; drained conditions; soil water content; fires; Manitoba
Abstract:
... Specific leaf area (SLA) and leaf area index (LAI) were estimated using site-specific allometric equations for a boreal black spruce (Picea mariana (Mill.) BSP) fire chronosequence in northern Manitoba, Canada. Stands ranged from 3 to 131 years in age and had soils that were categorized as well or poorly drained. The goals of the study were to: (i) measure SLA for the dominant tree and understory ...
... BACKGROUND AND AIMS: The ability to simulate plant competition accurately is essential for plant functional type (PFT)-based models used in climate-change studies, yet gaps and uncertainties remain in our understanding of the details of the competition mechanisms and in ecosystem responses at a landscape level. This study examines secondary succession in a temperate deciduous forest in eastern Chi ...
... Poplar clones were studied for their phytoextraction capacity in the second growth cycle (6-year growth) on a site in the Belgian Campine region, which is contaminated with Cd and Zn via historic atmospheric deposition of nearby zinc smelter activities. The field trial revealed regrowth problems for some clones that could not be predicted in the first growth cycle. Four allometric relations were a ...
Populus; allometry; amino acids; biomass; carbohydrates; clones; covariance; dry matter partitioning; environmental factors; equations; hybrids; ontogeny; plantations; root shoot ratio; root systems; soil; soil nutrients; tree and stand measurements
Abstract:
... In this study, we sampled coarse root biomass of three poplar clones in four 13-year-old hybrid poplar (Populus spp.) plantations, with the objective of developing an allometric relationship between diameter at breast height (DBH) and coarse root biomass. A second objective was to test significance of site, clone and ×site clone interaction effects on coarse root biomass, using analysis of covaria ...
Elaeagnus angustifolia; Populus; Salix alba; absorption; allometry; carbon; equations; forest restoration; forests; phytomass; regression analysis; river valleys; stand density; tree and stand measurements; Kazakhstan
Abstract:
... A predictive system has been developed to assess carbon absorption by tree-stand phytomass in the course of the tugai forest restoration in the Ili River valley (Republic of Kazakhstan). This system comprises constraint equations describing the relationships between the forest-stand density and age, average stand height and age, and average tree diameter and stand density; it also includes allomet ...
... Short rotation coppices (SRC) are often established by inserting cuttings vertically into the soil. Longer cuttings are generally regarded as superior to establish plants on stress-prone sites. However, knowledge about above- and belowground biomass production, plant allometry and root characteristic of clones established through different lengths of cuttings is scarce.The experiment was performed ...
... In forest ecosystem studies, tree stem structure variables (SSVs) proved to be an essential kind of parameters, and now simultaneously deriving SSVs of as many kinds as possible at large scales is preferred for enhancing the frontier studies on marcoecosystem ecology and global carbon cycle. For this newly emerging task, satellite imagery such as WorldView-2 panchromatic images (WPIs) is used as a ...
mathematical models; hybrids; forest trees; plant architecture; coppicing; allometry; Populus deltoides; equations; clones; Populus trichocarpa; genetic variation; overstory; Populus nigra; Oregon; Iowa; Ontario; Belgium; United Kingdom
Abstract:
... A multi-scale biometric methodology for describing the architecture of fast-growing short-rotation woody crops is used to describe 2-year-old poplar clones during the second rotation. To allow for expressions of genetic variability observed within this species (i.e., growth potential, leaf morphology, coppice and canopy structure), the method has been applied to two clones: Ghoy (Gho) (Populus del ...