气候变化领域集成服务门户(CCPortal): Diverse Mycorrhizal Associations Enhance Terrestrial C Storage in a Global Model

CCPortal

DOI	10.1029/2018GB005973
	Diverse Mycorrhizal Associations Enhance Terrestrial C Storage in a Global Model
	Sulman B.N.; Shevliakova E.; Brzostek E.R.; Kivlin S.N.; Malyshev S.; Menge D.N.L.; Zhang X.
发表日期	2019
ISSN	0886-6236
EISSN	1944-9224
起始页码	501
结束页码	523
卷号	33 期号:4
英文摘要	Accurate projections of the terrestrial carbon (C) sink are critical to understanding the future global C cycle and setting CO2 emission reduction goals. Current earth system models (ESMs) and dynamic global vegetation models (DGVMs) with coupled carbon-nitrogen cycles project that future terrestrial C sequestration will be limited by nitrogen (N) availability, but the magnitude of N limitation remains a critical uncertainty. Plants use multiple symbiotic nutrient acquisition strategies to mitigate N limitation, but current DGVMs omit these mechanisms. Fully coupling N-acquiring plant-microbe symbioses to soil organic matter (SOM) cycling within a DGVM for the first time, we show that increases in N acquisition via SOM decomposition and atmospheric N2 fixation could support long-term enhancement of terrestrial C sequestration at global scales under elevated CO2. The model reproduced elevated CO2 responses from two experiments (Duke and Oak Ridge) representing contrasting N acquisition strategies. N release from enhanced SOM decomposition supported vegetation growth at Duke, while inorganic N depletion limited growth at Oak Ridge. Global simulations reproduced spatial patterns of N-acquiring symbioses from a novel niche-based map of mycorrhizal fungi. Under a 100-ppm increase in CO2 concentrations, shifts in N acquisition pathways facilitated 200 Pg C of terrestrial C sequestration over 100 years compared to 50 Pg C for a scenario with static N acquisition pathways. Our results suggest that N acquisition strategies are important determinants of terrestrial C sequestration potential under elevated CO2 and that nitrogen-enabled DGVMs that omit symbiotic N acquisition may underestimate future terrestrial C uptake. ©2019. American Geophysical Union. All Rights Reserved.
英文关键词	carbon; elevated CO2; global land model; mycorrhizae; nitrogen; soil
语种	英语
scopus关键词	biogeochemical cycle; carbon emission; carbon sequestration; carbon sink; global change; mycorrhiza; nitrogen; nutrient availability; soil nitrogen; symbiosis; terrestrial ecosystem; Fungi
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129733
作者单位	Program in Atmospheric and Oceanic Sciences, Department of Geosciences, Princeton University, Princeton, NJ, United States; Sierra Nevada Research Institute, University of California, Merced, Merced, CA, United States; Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, United States; NOAA Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States; Department of Biology, West Virginia University, Morgantown, WV, United States; Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN, United States; Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, United States; Department of Ecology, Evolution, and Environmental Biology, Columbia University, New York, NY, United States; Woodrow Wilson School of Public and International Affairs, Princeton University, Princeton, NJ, United States; University of Maryland Center for Environmental Science, Frostburg, MD, United States
推荐引用方式 GB/T 7714	Sulman B.N.,Shevliakova E.,Brzostek E.R.,et al. Diverse Mycorrhizal Associations Enhance Terrestrial C Storage in a Global Model[J],2019,33(4).
APA	Sulman B.N..,Shevliakova E..,Brzostek E.R..,Kivlin S.N..,Malyshev S..,...&Zhang X..(2019).Diverse Mycorrhizal Associations Enhance Terrestrial C Storage in a Global Model.Global Biogeochemical Cycles,33(4).
MLA	Sulman B.N.,et al."Diverse Mycorrhizal Associations Enhance Terrestrial C Storage in a Global Model".Global Biogeochemical Cycles 33.4(2019).