globalchange  > 气候变化与战略
DOI: 10.1038/s41561-020-0607-0
论文题名:
Carbon loss from northern circumpolar permafrost soils amplified by rhizosphere priming
作者: 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.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2020
卷: 13, 期:8
起始页码: 560
结束页码: 565
语种: 英语
英文关键词: carbon emission ; carbon sequestration ; global warming ; organic carbon ; permafrost ; rhizosphere ; soil ecosystem ; soil respiration ; Arctic
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169630
Appears in Collections:气候变化与战略

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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, Germany; V. N. Sukachev Institute of Forest SB-RAS, Krasnoyarsk, Russian Federation; Department of Physical Geography, Stockholm University, Stockholm, Sweden; Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Department of Soil and Environment, Swedish University of Agricultural Sciences, Uppsala, Sweden; Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, Austria; International Institute for Applied Systems Analysis, Laxenburg, Austria; Department of Environmental Sciences and Engineering, Government College University Faisalabad, Faisalabad, Pakistan; Systems Ecology, Department of Ecological Sciences, Vrije Universiteit Amsterdam, Amsterdam, Netherlands

Recommended Citation:
Keuper F.,Wild B.,Kummu M.,et al. Carbon loss from northern circumpolar permafrost soils amplified by rhizosphere priming[J]. Nature Geoscience,2020-01-01,13(8)
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