Potential feedback mediated by soil microbiome response to warming in a glacier forefield
Potential feedback mediated by soil microbiome response to warming in a glacier forefield
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土壤微生物组对冰川前场变暖的反应介导的潜在反馈
DOI：
10.1111/gcb.14936
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发表时间：
2019-11
影响因子：
11.6
通讯作者：
Zhuang Guoqiang
中科院分区：
文献类型：
--
作者：
Wang Yuwan;Ma Anzhou;Liu Guohua;Ma Jianpeng;Wei Jing;Zhou Hanchang;Br;t Kristian Koefoed;Zhuang Guoqiang
由于全球变暖，山地冰川正在以前所未有的速度退缩。人们普遍认为，冰川退缩是由冰川表面的物理化学特性驱动的;然而，目前对这种生物驱动因素的了解仍然有限。据估计，全球山区冰川中储存着130 Tg的有机碳（OC）。由于全球变暖，OC的加速微生物分解可能会通过释放二氧化碳（CO2）和甲烷等温室气体产生热量，进一步加速山地冰川的融化过程。在这里，利用乌鲁木齐1号冰川前区的短期有氧培养数据，我们评估了5°C（对照），6.2°C（RCP 2.6），11°C（RCP 8.5）和15°C（极端温度）下土壤微生物介导的潜在气候反馈。我们观察到在变暖条件下CO2-C释放和产热增加，导致近地表（2 m）大气温度增加，范围从0.9°C到3.4°C。变暖显著改变了RNA衍生（活性）和DNA衍生（总）土壤微生物组的结构，活性微生物对温度升高比总微生物更敏感。考虑到温度和冰消年龄对CO2-C释放速率的积极影响，活性微生物群落结构的改变对CO2-C释放速率的增加产生了负面影响。我们的研究结果表明，冰川融化可能会显着加速从增加微生物分解OC的热量产生。这种风险可能适用于正在出现的变暖的其他高海拔冰川，从而改善了对潜在反馈对全球变暖影响的预测。
Mountain glaciers are retreating at an unprecedented rate due to global warming. Glacier retreat is widely believed to be driven by the physiochemical characteristics of glacier surfaces; however, the current knowledge of such biological drivers remains limited. An estimated 130 Tg of organic carbon (OC) is stored in mountain glaciers globally. As a result of global warming, the accelerated microbial decomposition of OC may further accelerate the melting process of mountain glaciers by heat production with the release of greenhouse gases, such as carbon dioxide (CO2) and methane. Here, using short‐term aerobic incubation data from the forefield of Urumqi Glacier No. 1, we assessed the potential climate feedback mediated by soil microbiomes at temperatures of 5°C (control), 6.2°C (RCP 2.6), 11°C (RCP 8.5), and 15°C (extreme temperature). We observed enhanced CO2‐C release and heat production under warming conditions, which led to an increase in near‐surface (2 m) atmospheric temperatures, ranging from 0.9°C to 3.4°C. Warming significantly changed the structures of the RNA‐derived (active) and DNA‐derived (total) soil microbiomes, and active microbes were more sensitive to increased temperatures than total microbes. Considering the positive effects of temperature and deglaciation age on the CO2‐C release rate, the alterations in the active microbial community structure had a negative impact on the increased CO2‐C release rate. Our results revealed that glacial melting could potentially be significantly accelerated by heat production from increased microbial decomposition of OC. This risk might be true for other high‐altitude glaciers under emerging warming, thus improving the predictions of the effects of potential feedback on global warming.
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影响因子：
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作者：
Zong N;Shi P;Jiang J;Song M;Xiong D;Ma W;Fu G;Zhang X;Shen Z
通讯作者：
Shen Z
甲烷厌氧氧化的电子受体驱动泥火山微生物群落结构和多样性
影响因子：
5.1
作者：
Ren Ge;Ma Anzhou;Zhang Yanfen;Deng Ye;Zheng Guodong;Zhuang Xuliang;Zhuang Guoqiang;Fortin Danielle
通讯作者：
Fortin Danielle
沿着冰川前场时间序列的细菌和真菌群落的不同组合模式和驱动力
影响因子：
9.7
作者：
Jiang, Yonglei;Lei, Yanbao;Li, Chunyang
通讯作者：
Li, Chunyang
微生物介导的西藏草原表土碳储量影响机制
DOI：
10.1038/ismej.2015.19
发表时间：
2015-09
期刊：
The ISME journal
影响因子：
--
作者：
Yue H;Wang M;Wang S;Gilbert JA;Sun X;Wu L;Lin Q;Hu Y;Li X;He Z;Zhou J;Yang Y
通讯作者：
Yang Y
DOI：
10.1038/s41396-018-0334-3
发表时间：
2018-12
期刊：
The ISME Journal
影响因子：
--
作者：
David J. Levy-Booth;I. Giesbrecht;C. Kellogg;T. Heger;D. D’Amore;P. Keeling;S. Hallam;W. Mohn
通讯作者：
David J. Levy-Booth;I. Giesbrecht;C. Kellogg;T. Heger;D. D’Amore;P. Keeling;S. Hallam;W. Mohn