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Extreme Wetness Reduces Soil Microbial Residue Carbon More Substantially Than Extreme Drought Across Grassland Ecosystems

文献类型：期刊论文

作者Yu, Yingchao8,9; Liu, Shuang7,9; Pan, Junxiao9; Zhu, Juntao8,9; Zong, Ning9; Zhang, Xinyuan8,9; Wu, Honghui5,6; An, Hui4; Diao, Huajie3; Zuo, Xiaoan2
刊名GLOBAL CHANGE BIOLOGY
出版日期2025-07-01
卷号31期号:7页码:e70353
关键词amino sugar aridity index China global change network enzyme activity increased precipitation nitrogen reduced precipitation
ISSN号1354-1013
DOI10.1111/gcb.70353
产权排序1
文献子类Article
英文摘要Soil microbial residue carbon (MRC) represents a significant component of soil carbon pools and regulates the response of soil carbon sequestration to precipitation changes. However, the response of soil MRC to extreme drought and wetness and the underlying mechanisms in regional grassland ecosystems remain unclear. Here, we quantified the responses of soil MRC content to extreme drought and wetness and identified the key drivers using a coordinated precipitation change experiment across nine alpine and temperate grassland ecosystems in China. Extreme drought (-50% precipitation) reduced MRC content by 8% on average. In contrast, extreme wetness (+50% precipitation) unexpectedly caused a pronounced 24% average decline in MRC content. Under extreme drought, reduced plant biomass inhibited soil MRC formation, and soil microbial N enzyme activity accelerated soil MRC decomposition. Moreover, wetter ecosystems exhibited greater losses of soil MRC, whereas drier ecosystems experienced a smaller decline. Under extreme wetness, increased soil microbial N enzyme activity accelerated the decomposition and utilization of microbial residue due to intensified microbial nitrogen limitation, resulting in a reduction in MRC. Our findings challenged the conventional understanding that extreme wetness promotes MRC accumulation by revealing a stronger reduction in MRC content under extreme wetness than under extreme drought. By uncovering distinct mechanisms driving MRC responses to extreme drought and wetness, our study provides critical insights into the dynamics of microbial-derived carbon in grassland ecosystems under future climate change.
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WOS关键词NITROGEN ; COMMUNITIES ; PHOSPHORUS ; RESPONSES ; BACTERIAL ; TURNOVER ; BIOMASS ; FUNGAL ; PLFA
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:001526617900001
出版者WILEY
源URL[http://ir.igsnrr.ac.cn/handle/311030/215401]  
专题生态系统网络观测与模拟院重点实验室_外文论文
通讯作者Zhang, Xinyuan; Yu, Qiang
作者单位1.Beijing Forestry Univ, Sch Grassland Sci, Beijing, Peoples R China
2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Ecol Safety & Sustainable Dev Arid, Urat Desert Grassland Res Stn, Lanzhou, Peoples R China;
3.Shanxi Agr Univ, Coll Grassland Sci, Taigu, Peoples R China;
4.Ningxia Univ, Sch Ecol & Environm, Yinchuan, Peoples R China;
5.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Key Lab Plant Nutr & Fertilizer, Minist Agr & Rural Affairs, Beijing, Peoples R China;
6.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, State Key Lab Efficient Utilizat Arable Land Chin, Beijing, Peoples R China;
7.Natl Ecosyst Sci Data Ctr, Beijing, Peoples R China;
8.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China;
9.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China;
10.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China;
推荐引用方式
GB/T 7714		 Yu, Yingchao,Liu, Shuang,Pan, Junxiao,et al. Extreme Wetness Reduces Soil Microbial Residue Carbon More Substantially Than Extreme Drought Across Grassland Ecosystems[J]. GLOBAL CHANGE BIOLOGY,2025,31(7):e70353.
APA Yu, Yingchao.,Liu, Shuang.,Pan, Junxiao.,Zhu, Juntao.,Zong, Ning.,...&Zhang, Xinyu.(2025).Extreme Wetness Reduces Soil Microbial Residue Carbon More Substantially Than Extreme Drought Across Grassland Ecosystems.GLOBAL CHANGE BIOLOGY,31(7),e70353.
MLA Yu, Yingchao,et al."Extreme Wetness Reduces Soil Microbial Residue Carbon More Substantially Than Extreme Drought Across Grassland Ecosystems".GLOBAL CHANGE BIOLOGY 31.7(2025):e70353.

入库方式： OAI收割

来源：地理科学与资源研究所

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