DOI: 10.1007/s10533-016-0193-9
Scopus记录号: 2-s2.0-84957686083
论文题名: Model-based analysis of environmental controls over ecosystem primary production in an alpine tundra dry meadow
作者: Fan Z. ; Neff J.C. ; Wieder W.R.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
卷: 128, 期: 2018-01-02 起始页码: 35
结束页码: 49
语种: 英语
英文关键词: Carbon
; Climate change
; Ecosystem model
; Nitrogen
; Phosphorus
; Plant productivity
Scopus关键词: air temperature
; alpine environment
; biogeochemistry
; carbon
; climate change
; ecosystem modeling
; environmental conditions
; growing season
; limiting factor
; meadow
; net primary production
; nitrogen
; nutrient availability
; phosphorus
; plant
; soil moisture
; tundra
英文摘要: We investigated several key limiting factors that control alpine tundra productivity by developing an ecosystem biogeochemistry model. The model simulates the coupled cycling of carbon (C), nitrogen (N), and phosphorus (P) and their interactions with gross primary production (GPP). It was parameterized with field observations from an alpine dry meadow ecosystem using a global optimization strategy to estimate the unknown parameters. The model, along with the estimated parameters, was first validated against independent data and then used to examine the environmental controls over plant productivity. Our results show that air temperature is the strongest limiting factor to GPP in the early growing season, N availability becomes important during the middle portion of the growing season, and soil moisture is the strongest limiting factors by late in the growing season. Overall, the controls over GPP during the growing season, from strongest to weakest, are soil moisture content, air temperature, N availability, and P availability. This simulation provides testable predictions of the shifting nature of physical and nutrient limitations on plant growth. The model also indicates that changing environmental conditions in the alpine will likely lead to changes in productivity. For example, warming eliminates the control of P availability on GPP and makes N availability surpass air temperature to become the second strongest limiting factor. In contrast, an increase in atmospheric nutrient deposition eliminates the control of N availability and enhances the importance of P availability. These analyses provide a quantitative and conceptual framework that can be used to test predictions and refine ecological analyses at this long-term ecological research site. © 2016, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83404
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Environmental Science Division, Argonne National Laboratory, Argonne, IL, United States; Geological Sciences Department, University of Colorado, Boulder, CO, United States; Institute for Arctic and Alpine Research, University of Colorado, Boulder, CO, United States; National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Fan Z.,Neff J.C.,Wieder W.R.. Model-based analysis of environmental controls over ecosystem primary production in an alpine tundra dry meadow[J]. Biogeochemistry,2016-01-01,128(2018-01-02)