Warming-induced permafrost thaw exacerbates tundra soil carbon decomposition mediated by microbial community ...

• Main Authors: Feng, Jiajie, Wang, Cong, Lei, Jiesi, Yang, Yunfeng, Yan, Qingyun, Zhou, Xishu, Tao, Xuanyu, Ning, Daliang, Yuan, Mengting, Qin, Yujia, Shi, Zhou, Guo, Xue, He, Zhili, Van Nostrand, Joy, Wu, Liyou, Bracho-Garillo, Rosvel, Penton, C., Cole, James, Konstantinidis, Konstantinos, Luo, Yiqi, Schuur, Edward, Tiedje, James, Zhou, Jizhong
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: figshare 2020
• Subjects: Environmental Sciences not elsewhere classified; Ecology; FOS Biological sciences; Biological Sciences not elsewhere classified; Plant Biology; permafrost; Tundra
• 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

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 ...