DOI: 10.1016/j.foreco.2016.11.033
Scopus记录号: 2-s2.0-85004024925
论文题名: Coarse woody decay rates vary by physical position in tropical seasonal rainforests of SW China
作者: Song Z. ; Dunn C. ; Lü X.-T. ; Qiao L. ; Pang J.-P. ; Tang J.-W.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 385 起始页码: 206
结束页码: 213
语种: 英语
英文关键词: Coarse woody debris
; Decomposition
; Nutrient release
; Tropical forest
; Wood decay
Scopus关键词: Decomposition
; Ecosystems
; Floors
; Forestry
; Rate constants
; Coarse woody debris
; Coarse woody detritus
; Decay rate constants
; Heterotrophic respiration
; Microbial activities
; Nutrient release
; Position dependence
; Tropical forest
; Decay (organic)
; coarse woody debris
; decomposition
; forest floor
; microbial activity
; mortality
; nutrient dynamics
; phytodetritus
; rainforest
; snag
; soil respiration
; tropical environment
; tropical forest
; China
英文摘要: Decomposition of woody detritus is an important but often ignored process in forest ecosystems. Moisture and temperature regimes are dominant controls over woody decay, contributing to significant variability at local, regional, and global scales. Our focus was on local variability in woody decay rates depending on their physical position. Woody detritus may decay on the forest floor, aboveground, or combination of both, depending on the mortality agent. In this study, we measured decay rates of logs, large branches on the forest floor, and snags over a three-year period. We also collected monthly respiration estimates, and analyzed woody detritus N and P content throughout the study. Logs exhibited the greatest mass loss with a decay-rate constant of k = 0.606 ± 0.020, followed by large branches (k = 0.316 ± 0.012) and snags (k = 0.268 ± 0.008). Heterotrophic respiration was greatest prior to the peak of rainy season, and was greatest for snag material during the first two years of sampling, probably a result of water saturation in ground material. Both N and P were released in all materials, but the rate of P release was much slower in snags. There were large differences of P concentration and C:P among the materials, but their value became similar after three years, indicating P limitation on microbial activities. Our results presented robust evidence for the physical-position-dependence of coarse woody detritus decomposition in the forests. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64544
Appears in Collections: 影响、适应和脆弱性
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作者单位: Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of SciencesYunnan, China; Department of Plant Pathology, University of Minnesota, Twin Cities, MN, United States; College of Forestry, Oregon State University, 280 Peavy Hall, Corvallis, OR, United States; Erguna Forest-Steppe Ecotone Research Station, Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
Recommended Citation:
Song Z.,Dunn C.,Lü X.-T.,et al. Coarse woody decay rates vary by physical position in tropical seasonal rainforests of SW China[J]. Forest Ecology and Management,2017-01-01,385