globalchange  > 气候变化与战略
DOI: 10.1111/gcb.14903
论文题名:
Imaging spectroscopy reveals the effects of topography and logging on the leaf chemistry of tropical forest canopy trees
作者: Swinfield T.; Both S.; Riutta T.; Bongalov B.; Elias D.; Majalap-Lee N.; Ostle N.; Svátek M.; Kvasnica J.; Milodowski D.; Jucker T.; Ewers R.M.; Zhang Y.; Johnson D.; Teh Y.A.; Burslem D.F.R.P.; Malhi Y.; Coomes D.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2020
卷: 26, 期:2
语种: 英语
英文关键词: imaging spectroscopy ; leaf traits ; logging ; nutrient availability ; phosphorus ; specific leaf area ; topography ; tropical forest
Scopus关键词: chemistry ; forest canopy ; image analysis ; leaf area ; logging (timber) ; multispectral image ; nutrient availability ; phosphorus ; topography ; tropical forest ; Borneo
英文摘要: Logging, pervasive across the lowland tropics, affects millions of hectares of forest, yet its influence on nutrient cycling remains poorly understood. One hypothesis is that logging influences phosphorus (P) cycling, because this scarce nutrient is removed in extracted timber and eroded soil, leading to shifts in ecosystem functioning and community composition. However, testing this is challenging because P varies within landscapes as a function of geology, topography and climate. Superimposed upon these trends are compositional changes in logged forests, with species with more acquisitive traits, characterized by higher foliar P concentrations, more dominant. It is difficult to resolve these patterns using traditional field approaches alone. Here, we use airborne light detection and ranging-guided hyperspectral imagery to map foliar nutrient (i.e. P, nitrogen [N]) concentrations, calibrated using field measured traits, over 400 km2 of northeastern Borneo, including a landscape-level disturbance gradient spanning old-growth to repeatedly logged forests. The maps reveal that canopy foliar P and N concentrations decrease with elevation. These relationships were not identified using traditional field measurements of leaf and soil nutrients. After controlling for topography, canopy foliar nutrient concentrations were lower in logged forest than in old-growth areas, reflecting decreased nutrient availability. However, foliar nutrient concentrations and specific leaf area were greatest in relatively short patches in logged areas, reflecting a shift in composition to pioneer species with acquisitive traits. N:P ratio increased in logged forest, suggesting reduced soil P availability through disturbance. Through the first landscape scale assessment of how functional leaf traits change in response to logging, we find that differences from old-growth forest become more pronounced as logged forests increase in stature over time, suggesting exacerbated phosphorus limitation as forests recover. © 2019 The Authors. Global Change Biology published by John Wiley & Sons Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159802
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作者单位: Forest Ecology and Conservation Group, Department of Plant Sciences, University of Cambridge, Cambridge, United Kingdom; Centre for Conservation Science, Royal Society for the Protection of Birds, Cambridge, United Kingdom; School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom; Environmental and Rural Science, University of New England, Armidale, NSW, Australia; Environmental Change Institute, School of Geography and the Environment, University of Oxford, Oxford, United Kingdom; Centre for Ecology & Hydrology, Lancaster Environment Centre, Lancaster, United Kingdom; Lancaster Environment Centre, Lancaster University, Lancaster, United Kingdom; Sabah Forestry Department, Forest Research Centre, Sandakan, Malaysia; Department of Forest Botany, Dendrology and Geobiocoenology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic; School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom; National Centre for Earth Observation, University of Edinburgh, Edinburgh, United Kingdom; School of Biological Sciences, University of Bristol, Bristol, United Kingdom; Imperial College London, Ascot, United Kingdom; School of Earth and Environmental Sciences, The University of Manchester, Manchester, United Kingdom

Recommended Citation:
Swinfield T.,Both S.,Riutta T.,et al. Imaging spectroscopy reveals the effects of topography and logging on the leaf chemistry of tropical forest canopy trees[J]. Global Change Biology,2020-01-01,26(2)
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