气候变化领域集成服务门户(CCPortal): A tipping point in carbon storage when forest expands into tundra is related to mycorrhizal recycling of nitrogen

CCPortal

DOI	10.1111/ele.13735
	A tipping point in carbon storage when forest expands into tundra is related to mycorrhizal recycling of nitrogen
	Clemmensen K.E.; Durling M.B.; Michelsen A.; Hallin S.; Finlay R.D.; Lindahl B.D.
发表日期	2021
ISSN	1461023X
起始页码	1193
结束页码	1204
卷号	24 期号:6
英文摘要	Tundra ecosystems are global belowground sinks for atmospheric CO2. Ongoing warming-induced encroachment by shrubs and trees risks turning this sink into a CO2 source, resulting in a positive feedback on climate warming. To advance mechanistic understanding of how shifts in mycorrhizal types affect long-term carbon (C) and nitrogen (N) stocks, we studied small-scale soil depth profiles of fungal communities and C–N dynamics across a subarctic-alpine forest-heath vegetation gradient. Belowground organic stocks decreased abruptly at the transition from heath to forest, linked to the presence of certain tree-associated ectomycorrhizal fungi that contribute to decomposition when mining N from organic matter. In contrast, ericoid mycorrhizal plants and fungi were associated with organic matter accumulation and slow decomposition. If climatic controls on arctic-alpine forest lines are relaxed, increased decomposition will likely outbalance increased plant productivity, decreasing the overall C sink capacity of displaced tundra. © 2021 The Authors. Ecology Letters published by John Wiley & Sons Ltd.
关键词	Arctic warming carbon sequestration decomposition functional genes meta-barcoding mycorrhizal type nitrogen cycling soil fungal communities stable isotopes treeline ecotone
英文关键词	Matthiola; carbon; nitrogen; Arctic; ecosystem; forest; mycorrhiza; soil; tundra; Arctic Regions; Carbon; Ecosystem; Forests; Mycorrhizae; Nitrogen; Soil; Tundra
语种	英语
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/204359
作者单位	Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Box 7026, Uppsala, 750 07, Sweden; Department of Biology, University of Copenhagen, Copenhagen, 2100, Denmark; Department of Soil and Environment, Swedish University of Agricultural Sciences, Box 7014, Uppsala, 750 07, Sweden
推荐引用方式 GB/T 7714	Clemmensen K.E.,Durling M.B.,Michelsen A.,et al. A tipping point in carbon storage when forest expands into tundra is related to mycorrhizal recycling of nitrogen[J],2021,24(6).
APA	Clemmensen K.E.,Durling M.B.,Michelsen A.,Hallin S.,Finlay R.D.,&Lindahl B.D..(2021).A tipping point in carbon storage when forest expands into tundra is related to mycorrhizal recycling of nitrogen.Ecology Letters,24(6).
MLA	Clemmensen K.E.,et al."A tipping point in carbon storage when forest expands into tundra is related to mycorrhizal recycling of nitrogen".Ecology Letters 24.6(2021).