DOI: 10.1111/ele.13735
论文题名: A tipping point in carbon storage when forest expands into tundra is related to mycorrhizal recycling of nitrogen
作者: Clemmensen K.E. ; Durling M.B. ; Michelsen A. ; Hallin S. ; Finlay R.D. ; Lindahl B.D.
刊名: Ecology Letters
ISSN: 1461023X
出版年: 2021
卷: 24, 期: 6 起始页码: 1193
结束页码: 1204
语种: 英语
中文关键词: 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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166800
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
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]. Ecology Letters,2021-01-01,24(6)