Warm- and cold-season grazing affect soil respiration differently in alpine grasslands

	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
刊名	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
	2017-10-01
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.
内容类型	期刊论文
源URL	[http://ir.nwipb.ac.cn/handle/363003/9817]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
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]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2017.
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.
MLA	Wang, Hao,et al."Warm- and cold-season grazing affect soil respiration differently in alpine grasslands".AGRICULTURE ECOSYSTEMS & ENVIRONMENT (2017).