Warm- and cold-season grazing affect soil respiration differently in alpine grasslands
Wang, Hao1,2,3; Liu, Huiying1,2; Wang, Yonghui1,2; Xu, Wei1,2; Liu, Anrong1,2; Ma, Zhiyuan1,2; Mi, Zhaorong3; Zhang, Zhenhua3; Wang, Shiping4,5; He, Jin-Sheng1,2,3
AbstractAs a traditional practice in grasslands, grazing significantly affects soil respiration (R-s). To improve our understanding of grassland carbon cycling, it is critical to partition the responses of soil respiration to grazing into autotrophic (R-a) and heterotrophic (R-h) respiration. In addition, it remains unclear how grazing patterns, such as warm- and cold-season grazing, influence R-s, and its components in alpine grasslands that are subject to increasing grazing pressure. Here, we conducted a six-year manipulative experiment combining with a meta analysis, to investigate the responses of 12, and its components to moderate grazing in a Tibetan alpine grassland. Grazing patterns included warm-season grazing by sheep during the growing seasons of 2008 to 2010 and simulating cold-season grazing by clipping during the non-growing seasons of 2011 to 2013. Our results showed that warm-season grazing minimally affected R-s, while cold-season grazing significantly increased R-s, by 13.1%. This result was supported by a meta-analysis at seven grassland sites across the Tibetan Plateau. Further, we found that warm-season grazing did not affect R-a or R-h, whereas cold-season grazing enhanced Ra (23.2%) more than R-h (4.9%). Cold-season grazing affected 12, and R-a differently depending on interannual variation in climate conditions. A significant increase of 17.1% and 26.3%, respectively, was recorded in dry and cold years, but no change was recorded in wet and warm years. This study highlights the differential responses of R, components to grazing, and suggests that different grazing patterns should be considered when evaluating future carbon cycles in grazing ecosystems on the Tibetan Plateau.
KeywordAutotrophic Respiration Heterotrophic Respiration Carbon Dioxide Carbon Cycling Grazing Pattern The Tibetan Plateau
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Indexed BySCI
Funding OrganizationNational Natural Science Foundation of China(31570394 ; National Program on Key Basic Research Project(2014CB954000) ; Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University ; 31630009)
WOS Research AreaAgriculture ; Environmental Sciences & Ecology
WOS SubjectAgriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS IDWOS:000411539700015
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Document Type期刊论文
Affiliation1.Peking Univ, Coll Urban & Environm Sci, Dept Ecol, Beijing 100871, Peoples R China
2.Peking Univ, Minist Educ, Key Lab Earth Surface Proc, Beijing 100871, Peoples R China
3.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Qinghai, Peoples R China
4.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Beijing 100085, Peoples R China
5.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Wang, Hao,Liu, Huiying,Wang, Yonghui,et al. Warm- and cold-season grazing affect soil respiration differently in alpine grasslands[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2017,248:136-143.
APA Wang, Hao.,Liu, Huiying.,Wang, Yonghui.,Xu, Wei.,Liu, Anrong.,...&He, Jin-Sheng.(2017).Warm- and cold-season grazing affect soil respiration differently in alpine grasslands.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,248,136-143.
MLA Wang, Hao,et al."Warm- and cold-season grazing affect soil respiration differently in alpine grasslands".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 248(2017):136-143.
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