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Rodent Bioturbation Significantly Enhances Annual Methane Uptake by Tibetan Alpine Grasslands

文献类型：期刊论文

作者Gan, Dezhao8; Yu, Dongsheng7,8; Zuo, Hongchao8; Li, Zheng6; Zhang, Zelong7,8; Li, Huinan1,5,8; Lin, Zhenrong6; Wang, Hui1,5; Zhou, Qingping1,5; Wang, Jinsong3,4
刊名GLOBAL CHANGE BIOLOGY
出版日期2025-07-01
卷号31期号:7页码:e70342
关键词alpine grassland CH4 uptake non-growing season rodent bioturbation soil moisture temperate grassland
ISSN号1354-1013
DOI10.1111/gcb.70342
产权排序6
文献子类Article
英文摘要Tibetan alpine grasslands (AG) serve as critical methane (CH4) sinks, yet face degradation from anthropogenic and climatic disturbances that promote subterranean rodents (e.g., Plateau zokor [Myospalax baileyi] and pika [Ochotona curzoniae]) activities. Although rodent bioturbation (e.g., burrowing, foraging and excreting) alters soil structure, soil physico-chemical properties and productivity from AG, its impacts on CH4 uptake remain poorly understood. Among the first, we combined paired year-round CH4 flux measurements from Plateau zokor mounds (ZM) and surrounding healthy meadow (HM) patches in Tibetan alpine meadow with collated CH4 fluxes from meta- and synthetic analyses across Tibetan AG, temperate grasslands (TG) and tropical grasslands (TrG) globally. We observed that rodent bioturbation significantly (p < 0.001) doubled annual CH4 uptake (HM: -0.91 +/- 0.08 kg C ha(-1) vs. ZM: -1.80 +/- 0.19 kg C ha(-1), mean +/- standard error, negative values indicate uptake). Notably, 67% of this net increase (-0.89 +/- 0.10 kg C ha(-1) year(-1)) due to rodent bioturbation occurred during the growing season. Meta-analysis results revealed this phenomenon associated with significantly (p < 0.001) decreased topsoil moisture and increased functional gene abundances of pmoA for methanotrophs. Non-growing season (NGS) CH4 uptake contributed 45% and 39% to annual CH4 uptake for HM and ZM, respectively, falling into the ranges of 12%-64% NGS CH4 uptake contributions from TG to AG of China. The TrG showed significant (p < 0.001) lower annual CH4 uptake than TG and AG globally, due to the fact that significant (p < 0.05) greater precipitation and soil moisture from the former than the latter. Our findings elucidate mechanisms underlying rodent-mediated CH4 flux changes and highlight soil moisture as a key driver for global CH4 sink variations. These results emphasise the need for long-term monitoring to better assess the ecological consequences of bioturbation in climate-sensitive alpine ecosystems.
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WOS关键词QINGHAI-TIBET ; PLATEAU ; SOIL ; MEADOW ; CARBON ; CLIMATE ; CO2 ; DEGRADATION ; DISTURBANCE ; ECOSYSTEMS
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:001524760700001
出版者WILEY
源URL[http://ir.igsnrr.ac.cn/handle/311030/215403]  
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Ma, Lei
作者单位1.Southwest Minzu Univ, Coll Grassland Resources, Chengdu, Peoples R China;
2.Univ Chinese Acad Sci, Sch Resources & Environm, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Sichuan Zoige Alpine Wetland Ecosyst Natl Observat, Beijing, Peoples R China;
4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Simulat, Beijing, Peoples R China;
5.Southwest Minzu Univ, Inst Qinghai Tibetan Plateau, Sichuan Zoige Alpine Wetland Ecosyst Natl Observat, Chengdu, Peoples R China;
6.Lanzhou Univ, Coll Ecol, Lanzhou, Peoples R China;
7.Gansu Agr Univ, Coll Pratacultural Sci, Key Lab Grassland Ecosyst, Minist Educ, Lanzhou, Peoples R China;
8.Lanzhou Univ, Coll Atmospher Sci, Lanzhou, Peoples R China;
推荐引用方式
GB/T 7714		 Gan, Dezhao,Yu, Dongsheng,Zuo, Hongchao,et al. Rodent Bioturbation Significantly Enhances Annual Methane Uptake by Tibetan Alpine Grasslands[J]. GLOBAL CHANGE BIOLOGY,2025,31(7):e70342.
APA Gan, Dezhao.,Yu, Dongsheng.,Zuo, Hongchao.,Li, Zheng.,Zhang, Zelong.,...&Ma, Lei.(2025).Rodent Bioturbation Significantly Enhances Annual Methane Uptake by Tibetan Alpine Grasslands.GLOBAL CHANGE BIOLOGY,31(7),e70342.
MLA Gan, Dezhao,et al."Rodent Bioturbation Significantly Enhances Annual Methane Uptake by Tibetan Alpine Grasslands".GLOBAL CHANGE BIOLOGY 31.7(2025):e70342.

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来源：地理科学与资源研究所

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