ArticleProceedings of the National Academy of Sciences of the United States of America2025
Increased microbial carbon use efficiency upon abrupt permafrost thaw.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Soil carbon (C) dynamics upon permafrost thaw represents a major uncertainty in climate projections. Both soil C loss and formation in permafrost regions are mediated by microorganisms, and the balance of these two processes could be characterized by a synthetic metric termed microbial carbon use efficiency (CUE, defined as the ratio of C used for growth over C uptake). However, how microbial CUE responds to permafrost thaw remains unclear due to the lack of direct experimental evidence. Here, based on an ~27 y permafrost thaw sequence and five additional thermokarst-impacted sites across the northeastern Tibetan Plateau, we investigate the response of microbial CUE to abrupt permafrost thaw using a substrate-independent
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