DOI: 10.1111/gcb.13939
Scopus记录号: 2-s2.0-85032731024
论文题名: Temporal changes in soil C-N-P stoichiometry over the past 60 years across subtropical China
作者: Yu Z. ; Wang M. ; Huang Z. ; Lin T.-C. ; Vadeboncoeur M.A. ; Searle E.B. ; Chen H.Y.H.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 3 起始页码: 1308
结束页码: 1320
语种: 英语
英文关键词: climate gradient
; deep soil
; global change
; low P soil
; soil parent material
; soil type
; vegetation type
Scopus关键词: biogeochemical cycle
; climate variation
; concentration (composition)
; global change
; phosphorus
; soil carbon
; soil depth
; soil nitrogen
; soil type
; stoichiometry
; subtropical region
; vegetation type
; China
英文摘要: Controlled experiments have shown that global changes decouple the biogeochemical cycles of carbon (C), nitrogen (N), and phosphorus (P), resulting in shifting stoichiometry that lies at the core of ecosystem functioning. However, the response of soil stoichiometry to global changes in natural ecosystems with different soil depths, vegetation types, and climate gradients remains poorly understood. Based on 2,736 observations along soil profiles of 0–150 cm depth from 1955 to 2016, we evaluated the temporal changes in soil C-N-P stoichiometry across subtropical China, where soils are P-impoverished, with diverse vegetation, soil, and parent material types and a wide range of climate gradients. We found a significant overall increase in soil total C concentration and a decrease in soil total P concentration, resulting in increasing soil C:P and N:P ratios during the past 60 years across all soil depths. Although average soil N concentration did not change, soil C:N increased in topsoil while decreasing in deeper soil. The temporal trends in soil C-N-P stoichiometry differed among vegetation, soil, parent material types, and spatial climate variations, with significantly increased C:P and N:P ratios for evergreen broadleaf forest and highly weathered Ultisols, and more pronounced temporal changes in soil C:N, N:P, and C:P ratios at low elevations. Our sensitivity analysis suggests that the temporal changes in soil stoichiometry resulted from elevated N deposition, rising atmospheric CO2 concentration and regional warming. Our findings revealed that the responses of soil C-N-P and stoichiometry to long-term global changes have occurred across the whole soil depth in subtropical China and the magnitudes of the changes in soil stoichiometry are dependent on vegetation types, soil types, and spatial climate variations. © 2017 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110478
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Key Laboratory for Subtropical Mountain Ecology, College of Geographical Sciences, Fujian Normal University, Fuzhou, China; Faculty of Natural Resources Management, Lakehead University, Thunder Bay, ON, Canada; Department of Life Science, National Taiwan Normal University, Taipei, Taiwan; Earth Systems Research Center, University of New Hampshire, Durham, NH, United States
Recommended Citation:
Yu Z.,Wang M.,Huang Z.,et al. Temporal changes in soil C-N-P stoichiometry over the past 60 years across subtropical China[J]. Global Change Biology,2018-01-01,24(3)