globalchange  > 气候减缓与适应
DOI: 10.1038/NGEO2413
论文题名:
Future productivity and carbon storage limited by terrestrial nutrient availability
作者: Wieder W.R.; Cleveland C.C.; Smith W.K.; Todd-Brown K.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期:6
起始页码: 441
结束页码: 444
语种: 英语
Scopus关键词: biomass allocation ; carbon cycle ; carbon dioxide ; carbon sequestration ; land surface ; net primary production ; nutrient availability ; nutrient limitation ; phosphorus ; terrestrial ecosystem ; twenty first century
英文摘要: The size of the terrestrial sink remains uncertain. This uncertainty presents a challenge for projecting future climate carbon cycle feedbacks1'4. Terrestrial carbon storage is dependent on the availability of nitrogen for plant growth5'8, and nitrogen limitation is increasingly included in global models9'11. Widespread phosphorus limitation in terrestrial ecosystems12 may also strongly regulate the global carbon cycle13'15, but explicit considerations of phosphorus limitation in global models are uncommon16. Here we use global state-of-the-art coupled carbon-climate model projections of terrestrial net primary productivity and carbon storage from 1860-2100; estimates of annual new nutrient inputs from deposition, nitrogen fixation, and weathering; and estimates of carbon allocation and stoichiometry to evaluate how simulated CO2 fertilization effects could be constrained by nutrient availability. We find that the nutrients required for the projected increases in net primary productivity greatly exceed estimated nutrient supply rates, suggesting that projected productivity increases may be unrealistically high. Accounting for nitrogen and nitrogen-phosphorus limitation lowers projected end-of-century estimates of net primary productivity by 19% and 25%, respectively, and turns the land surface into a net source of CO2 by 2100. We conclude that potential effects of nutrient limitation must be considered in estimates of the terrestrial carbon sink strength through the twenty-first century. © 2015 Macmillan Publishers Limited. 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/106168
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Climate and Global Dynamics Division, National Center for Atmospheric Research, Boulder, CO, United States; Institute for Arctic and Alpine Research, University of Colorado, Boulder, CO, United States; Department of Ecosystem and Conservation Sciences, University of Montana, Missoula, MT, United States; Institute on the Environment, University of Minnesota, Saint Paul, MN, United States; Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK, United States; Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, United States

Recommended Citation:
Wieder W.R.,Cleveland C.C.,Smith W.K.,et al. Future productivity and carbon storage limited by terrestrial nutrient availability[J]. Nature Geoscience,2015-01-01,8(6)
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