Warming-induced permafrost thaw exacerbates tundra soil carbon decomposition mediated by microbial community ...
Abstract Background It is well-known that global warming has effects on high-latitude tundra underlain with permafrost. This leads to a severe concern that decomposition of soil organic carbon (SOC) previously stored in this region, which accounts for about 50% of the world’s SOC storage, will cau...
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
figshare
2020
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Subjects: | |
Online Access: | https://dx.doi.org/10.6084/m9.figshare.c.4822476 https://springernature.figshare.com/collections/Warming-induced_permafrost_thaw_exacerbates_tundra_soil_carbon_decomposition_mediated_by_microbial_community/4822476 |
Summary: | Abstract Background It is well-known that global warming has effects on high-latitude tundra underlain with permafrost. This leads to a severe concern that decomposition of soil organic carbon (SOC) previously stored in this region, which accounts for about 50% of the world’s SOC storage, will cause positive feedback that accelerates climate warming. We have previously shown that short-term warming (1.5 years) stimulates rapid, microbe-mediated decomposition of tundra soil carbon without affecting the composition of the soil microbial community (based on the depth of 42684 sequence reads of 16S rRNA gene amplicons per 3 g of soil sample). Results We show that longer-term (5 years) experimental winter warming at the same site altered microbial communities (p < 0.040). Thaw depth correlated the strongest with community assembly and interaction networks, implying that warming-accelerated tundra thaw fundamentally restructured the microbial communities. Both carbon decomposition and methanogenesis genes ... |
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