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Potential feedback mediated by soil microbiome response to warming in a glacier forefield
Wang, Yuwan; Ma, Anzhou; Liu, Guohua; Ma, Jianpeng; Wei, Jing; Zhou, Hanchang; Brandt, Kristian Koefoed; Zhuang, Guoqiang
2020-02-01
Source PublicationGLOBAL CHANGE BIOLOGY
ISSN1354-1013
Volume26Issue:2Pages:697-708
AbstractMountain 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 degrees C (control), 6.2 degrees C (RCP 2.6), 11 degrees C (RCP 8.5), and 15 degrees 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 degrees C to 3.4 degrees 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.
Department中国科学院环境生物技术重点实验室
KeywordCO2-C release feedback glacier forefield global warming heat production soil microbiome
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/43397
Collection中国科学院环境生物技术重点实验室
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
2.Univ Copenhagen, Dept Plant & Environm Sci, Fac Sci, Frederiksberg, Denmark
3.Univ Chinese Acad Sci, Sino Danish Coll, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Wang, Yuwan,Ma, Anzhou,Liu, Guohua,et al. Potential feedback mediated by soil microbiome response to warming in a glacier forefield[J]. GLOBAL CHANGE BIOLOGY,2020,26(2):697-708.
APA Wang, Yuwan.,Ma, Anzhou.,Liu, Guohua.,Ma, Jianpeng.,Wei, Jing.,...&Zhuang, Guoqiang.(2020).Potential feedback mediated by soil microbiome response to warming in a glacier forefield.GLOBAL CHANGE BIOLOGY,26(2),697-708.
MLA Wang, Yuwan,et al."Potential feedback mediated by soil microbiome response to warming in a glacier forefield".GLOBAL CHANGE BIOLOGY 26.2(2020):697-708.
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