DOI: 10.1016/j.foreco.2017.01.020
Scopus记录号: 2-s2.0-85013149496
论文题名: Carbon concentration declines with decay class in tropical forest woody debris
作者: Chao K.-J. ; Chen Y.-S. ; Song G.-Z.M. ; Chang Y.-M. ; Sheue C.-R. ; Phillips O.L. ; Hsieh C.-F.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 391 起始页码: 75
结束页码: 85
语种: 英语
英文关键词: Carbon content
; Decomposition
; Necromass
; Specific gravity
; Tropical forest
; Woody debris
Scopus关键词: Debris
; Decay (organic)
; Decomposition
; Density (specific gravity)
; Ecology
; Ecosystems
; Hardwoods
; Tropics
; Wood
; Carbon concentrations
; Carbon content
; Carbon fraction
; Carbon stocks
; Forest ecosystem
; Necromass
; Tropical forest
; Woody debris
; Forestry
; carbon
; concentration (composition)
; dead wood
; decomposition
; density
; forest ecosystem
; gravity
; tropical forest
; woody debris
; Carbon
; Concentration
; Decay
; Forests
; Tropical Atmospheres
; Taiwan
英文摘要: Carbon stored in woody debris is a key carbon pool in forest ecosystems. The most widely-used method to convert woody debris volume to carbon is by first multiplying field-measured volume with wood density to obtain necromass, and then assuming that a fixed proportion (often 50%) of the necromass is carbon. However, this crucial assumption is rarely tested directly, especially in the tropics. The aim of this study is to verify the field carbon concentration values of living trees and woody debris in two distinct tropical forests in Taiwan. Wood from living trees and woody debris across five decay classes was sampled to measure density and carbon concentrations. We found that both wood density and carbon concentration (carbon mass/total mass) declined significantly with the decay class of the wood. Mean (±SE) carbon concentration values for living trees were 44.6 ± 0.1%, while for decay classes one to five they were respectively 41.1 ± 1.4%, 41.4 ± 1.0%, 37.7 ± 1.3%, 30.5 ± 2.0%, and 19.6 ± 2.2%. Total necromass carbon stock was low, only 3.33 ± 0.55 Mg C ha−1 in the windward forest (Lanjenchi) and 4.65 ± 1.63 Mg C ha−1 in the lowland forest (Nanjenshan). Applying the conventional 50% necromass carbon fraction value would cause a substantial overestimate of the carbon stocks in woody debris of between 17% and 36%, or about 1 Mg of carbon per hectare. The decline in carbon concentration and the increase of variances in the heavily decayed class suggest that in high-diversity tropical forests there are diverse decomposition trajectories and that assuming a fixed carbon fraction across woody pieces is not justified. Our work reveals the need to consider site-specific and decay class-specific carbon concentrations in order to accurately estimate carbon stocks and fluxes in forest ecosystems. If the marked decline in carbon content with necromass decay is typical of tropical forests, the dead wood carbon pool in the biome needs revision and is likely to be overestimated. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64397
Appears in Collections: 影响、适应和脆弱性
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作者单位: International Master Program of Agriculture, National Chung Hsing University, Taichung, Taiwan; Department of Life Sciences & Research Center for Global Change Biology, National Chung Hsing University, Taichung, Taiwan; Department of Soil and Water Conservation, National Chung Hsing University, Taichung, Taiwan; Department of Ecoscience and Ecotechnology, National University of Tainan, Tainan, Taiwan; School of Geography, University of Leeds, Leeds, United Kingdom; Institute of Ecology and Evolutionary Biology, National Taiwan University, Taipei, Taiwan
Recommended Citation:
Chao K.-J.,Chen Y.-S.,Song G.-Z.M.,et al. Carbon concentration declines with decay class in tropical forest woody debris[J]. Forest Ecology and Management,2017-01-01,391