DOI: 10.1002/2016GL069241
论文题名: Phosphorus feedbacks constraining tropical ecosystem responses to changes in atmospheric CO2 and climate
作者: Yang X. ; Thornton P.E. ; Ricciuto D.M. ; Hoffman F.M.
刊名: Geophysical Research Letters
ISSN: 0094-8916
EISSN: 1944-8647
出版年: 2016
卷: 43, 期: 13 起始页码: 7205
结束页码: 7214
语种: 英语
英文关键词: Amazon
; carbon
; phosphorus
; tropical
Scopus关键词: Atmospheric humidity
; Carbon
; Ecosystems
; Enzymes
; Nutrients
; Phosphatases
; Phosphorus
; Tropics
; Amazon
; Enzyme production
; Net primary productivity
; Nutrient availability
; Nutrient dynamics
; P availabilities
; Tropical
; Tropical ecosystems
; Carbon dioxide
英文摘要: The effects of phosphorus (P) availability on carbon (C) cycling in the Amazon region are investigated using CLM-CNP. We demonstrate that the coupling of P dynamics reduces the simulated historical terrestrial C sink due to increasing atmospheric CO2 concentrations ([CO2]) by about 26%. Our exploratory simulations show that the response of tropical forest C cycling to increasing [CO2] depends on how elevated CO2 affects phosphatase enzyme production. The effects of warming are more complex, depending on the interactions between humidity, C, and nutrient dynamics. While a simulation with low humidity generally shows the reduction of net primary productivity (NPP), a second simulation with higher humidity suggests overall increases in NPP due to the dominant effects of reduced water stress and more nutrient availability. Our simulations point to the need for (1) new observations on how elevated [CO2] affects phosphatase enzyme production and (2) more tropical leaf-scale measurements under different temperature/humidity conditions with different soil P availability. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978511547&doi=10.1002%2f2016GL069241&partnerID=40&md5=ef6454c6f458d2f1621f04223cce4ee4
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9879
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Environmental Science Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States
Recommended Citation:
Yang X.,Thornton P.E.,Ricciuto D.M.,et al. Phosphorus feedbacks constraining tropical ecosystem responses to changes in atmospheric CO2 and climate[J]. Geophysical Research Letters,2016-01-01,43(13).