气候变化领域集成服务门户(CCPortal): Warm- and cold-season grazing affect soil respiration differently in alpine grasslands

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DOI	10.1016/j.agee.2017.07.041
	Warm- and cold-season grazing affect soil respiration differently in alpine grasslands
	Wang, Hao; Liu, Huiying; Wang, Yonghui; Xu, Wei; Liu, Anrong; Ma, Zhiyuan; Mi, Zhaorong; Zhang, Zhenhua; Wang, Shiping; He, Jin-Sheng
通讯作者	He, JS (通讯作者)
发表日期	2017
ISSN	0167-8809
EISSN	1873-2305
起始页码	136
结束页码	143
卷号	248
英文摘要	As 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.
关键词	TIBETAN PLATEAU TEMPERATURE SENSITIVITY CARBON NITROGEN MEADOW IMPACTS METAANALYSIS RESPONSES ECOSYSTEM PRAIRIE
英文关键词	Autotrophic respiration; Heterotrophic respiration; Carbon dioxide; Carbon cycling; Grazing pattern; The Tibetan Plateau
语种	英语
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
WOS类目	Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS记录号	WOS:000411539700015
来源期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258914
推荐引用方式 GB/T 7714	Wang, Hao,Liu, Huiying,Wang, Yonghui,et al. Warm- and cold-season grazing affect soil respiration differently in alpine grasslands[J]. 中国科学院青藏高原研究所,2017,248.
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.
MLA	Wang, Hao,et al."Warm- and cold-season grazing affect soil respiration differently in alpine grasslands".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 248(2017).