globalchange  > 气候减缓与适应
DOI: 10.1002/2017JG004361
Scopus记录号: 2-s2.0-85042528662
论文题名:
Climate Change Impacts on Net Ecosystem Productivity in a Subtropical Shrubland of Northwestern México
作者: Verduzco V.S.; Vivoni E.R.; Yépez E.A.; Rodríguez J.C.; Watts C.J.; Tarin T.; Garatuza-Payán J.; Robles-Morua A.; Ivanov V.Y.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期:2
起始页码: 688
结束页码: 711
语种: 英语
英文关键词: carbon fluxes ; climate change ; ecohydrology ; eddy covariance ; modeling ; North American monsoon
英文摘要: The sensitivity of semiarid ecosystems to climate change is not well understood due to competing effects of soil and plant-mediated carbon fluxes. Limited observations of net ecosystem productivity (NEP) under rising air temperature and CO2 and altered precipitation regimes also hinder climate change assessments. A promising avenue for addressing this challenge is through the application of numerical models. In this work, we combine a mechanistic ecohydrological model and a soil carbon model to simulate soil and plant processes in a subtropical shrubland of northwest México. Due to the influence of the North American monsoon, the site exhibits net carbon losses early in the summer and net carbon gains during the photosynthetically active season. After building confidence in the simulations through comparisons with eddy covariance flux data, we conduct a series of climate change experiments for near-future (2030–2045) scenarios that test the impact of meteorological changes and CO2 fertilization relative to historical conditions (1990–2005). Results indicate that reductions in NEP arising from warmer conditions are effectively offset by gains in NEP due to the impact of higher CO2 on water use efficiency. For cases with higher summer rainfall and CO2 fertilization, climate change impacts lead to an increase of ~25% in NEP relative to historical conditions (mean of 66 g C m−2). Net primary production and soil respiration derived from decomposition are shown to be important processes that interact to control NEP and, given the role of semiarid ecosystems in the global carbon budget, deserve attention in future simulation efforts of ecosystem fluxes. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114605
Appears in Collections:气候减缓与适应

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作者单位: Departamento de Ciencias del Agua y Medio Ambiente, Instituto Tecnológico de Sonora, Ciudad Obregón, Mexico; School of Earth and Space Exploration, Arizona State University, Tempe, AZ, United States; School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, United States; Departamento de Agricultura y Ganadería, Universidad de Sonora, Hermosillo, Mexico; Departamento de Física, Universidad de Sonora, Hermosillo, Mexico; School of Life Sciences, University of Technology Sydney, Sydney, NSW, Australia; Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor, MI, United States

Recommended Citation:
Verduzco V.S.,Vivoni E.R.,Yépez E.A.,et al. Climate Change Impacts on Net Ecosystem Productivity in a Subtropical Shrubland of Northwestern México[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(2)
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