气候变化领域集成服务门户(CCPortal): Carbon loss from northern circumpolar permafrost soils amplified by rhizosphere priming

CCPortal

DOI	10.1038/s41561-020-0607-0
	Carbon loss from northern circumpolar permafrost soils amplified by rhizosphere priming
	Keuper F.; Wild B.; Kummu M.; Beer C.; Blume-Werry G.; Fontaine S.; Gavazov K.; Gentsch N.; Guggenberger G.; Hugelius G.; Jalava M.; Koven C.; Krab E.J.; Kuhry P.; Monteux S.; Richter A.; Shahzad T.; Weedon J.T.; Dorrepaal E.
发表日期	2020
ISSN	17520894
起始页码	560
结束页码	565
卷号	13 期号:8
英文摘要	As global temperatures continue to rise, a key uncertainty of climate projections is the microbial decomposition of vast organic carbon stocks in thawing permafrost soils. Decomposition rates can accelerate up to fourfold in the presence of plant roots, and this mechanism—termed the rhizosphere priming effect—may be especially relevant to thawing permafrost soils as rising temperatures also stimulate plant productivity in the Arctic. However, priming is currently not explicitly included in any model projections of future carbon losses from the permafrost area. Here, we combine high-resolution spatial and depth-resolved datasets of key plant and permafrost properties with empirical relationships of priming effects from living plants on microbial respiration. We show that rhizosphere priming amplifies overall soil respiration in permafrost-affected ecosystems by ~12%, which translates to a priming-induced absolute loss of ~40 Pg soil carbon from the northern permafrost area by 2100. Our findings highlight the need to include fine-scale ecological interactions in order to accurately predict large-scale greenhouse gas emissions, and suggest even tighter restrictions on the estimated 200 Pg anthropogenic carbon emission budget to keep global warming below 1.5 °C. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
英文关键词	carbon emission; carbon sequestration; global warming; organic carbon; permafrost; rhizosphere; soil ecosystem; soil respiration; Arctic
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206798
作者单位	BioEcoAgro Joint Research Unit, INRAE, Barenton-Bugny, France; Climate Impacts Research Centre, Department of Ecology and Environmental Science, Umeå University, Abisko, Sweden; Department of Environmental Science, Stockholm University, Stockholm, Sweden; Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden; Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden; Water and Development Research Group, Aalto University, Espoo, Finland; Institute of Soil Science, Department of Earth Sciences, Universität Hamburg, Hamburg, Germany; Center for Earth System Research and Sustainability, Universität Hamburg, Hamburg, Germany; Experimental Plant Ecology, Institute of Botany and Landscape Ecology, Greifswald University, Greifswald, Germany; VetAgro Sup, UMR Ecosystème Prairial, INRAE, Clermont Ferrand, France; Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Lausanne, Switzerland; Institute of Soil Science, Leibniz Universität Hannover, Hannover, Germa...
推荐引用方式 GB/T 7714	Keuper F.,Wild B.,Kummu M.,et al. Carbon loss from northern circumpolar permafrost soils amplified by rhizosphere priming[J],2020,13(8).
APA	Keuper F..,Wild B..,Kummu M..,Beer C..,Blume-Werry G..,...&Dorrepaal E..(2020).Carbon loss from northern circumpolar permafrost soils amplified by rhizosphere priming.Nature Geoscience,13(8).
MLA	Keuper F.,et al."Carbon loss from northern circumpolar permafrost soils amplified by rhizosphere priming".Nature Geoscience 13.8(2020).