Carbon, nitrogen, and phosphorus storage in alpine grassland ecosystems of Tibet: effects of grazing exclusion

doi:10.1002/ece3.1732

	Carbon, nitrogen, and phosphorus storage in alpine grassland ecosystems of Tibet: effects of grazing exclusion
	Lu, Xuyang 1,2; Yan, Yan 1; Sun, Jian 3; Zhang, Xiaoke 1; Chen, Youchao 1; Wang, Xiaodan 1,2; Cheng, Genwei 1
刊名	ECOLOGY AND EVOLUTION
	2015-10-01
卷号	5 期号:19 页码:4492-4504
关键词	Alpine Meadow Alpine Steppe Fencing Soil Organic Carbon Tibetan Plateau
ISSN号	2045-7758
DOI	10.1002/ece3.1732
文献子类	Article
英文摘要	In recent decades, alpine grasslands have been seriously degraded on the Tibetan Plateau and grazing exclusion by fencing has been widely adopted to restore degraded grasslands since 2004. To elucidate how alpine grasslands carbon (C), nitrogen (N), and phosphorus (P) storage responds to this management strategy, three types of alpine grassland in nine counties in Tibet were selected to investigate C, N, and P storage in the environment by comparing free grazing (FG) and grazing exclusion (GE) treatments, which had run for 6-8years. The results revealed that there were no significant differences in total ecosystem C, N, and P storage, as well as the C, N, and P stored in both total biomass and soil (0-30cm) fractions between FG and GE grasslands. However, precipitation played a key role in controlling C, N, and P storage and distribution. With grazing exclusion, C and N stored in aboveground biomass significantly increased by 5.7g m(-2) and 0.1g m(-2), respectively, whereas the C and P stored in the soil surface layer (0-15cm) significantly decreased by 862.9g m(-2) and 13.6g m(-2), respectively. Furthermore, the storage of the aboveground biomass C, N, and P was positively correlated with vegetation cover and negatively correlated with the biodiversity index, including Pielou evenness index, Shannon-Wiener diversity index, and Simpson dominance index. The storage of soil surface layer C, N, and P was positively correlated with soil silt content and negatively correlated with soil sand content. Our results demonstrated that grazing exclusion had no impact on total C, N, and P storage, as well as C, N, and P in both total biomass and soil (0-30cm) fractions in the alpine grassland ecosystem. However, grazing exclusion could result in increased aboveground biomass C and N pools and decreased soil surface layer (0-15cm) Cand P pools.
WOS关键词	NET PRIMARY PRODUCTIVITY ; SOIL C STOCKS ; PRECIPITATION GRADIENT ; SEMIARID RANGELANDS ; SPECIES RICHNESS ; ORGANIC-MATTER ; INNER-MONGOLIA ; GROWING-SEASON ; USE EFFICIENCY ; PLATEAU
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000362523300023
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/67863]
专题	中国科学院地理科学与资源研究所
通讯作者	Yan, Yan
作者单位	1.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China 2.Chinese Acad Sci, Xainza Alpine Steppe & Wetland Ecosyst Observat &, Xainza 853100, Peoples R China 3.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Lu, Xuyang,Yan, Yan,Sun, Jian,et al. Carbon, nitrogen, and phosphorus storage in alpine grassland ecosystems of Tibet: effects of grazing exclusion[J]. ECOLOGY AND EVOLUTION,2015,5(19):4492-4504.
APA	Lu, Xuyang.,Yan, Yan.,Sun, Jian.,Zhang, Xiaoke.,Chen, Youchao.,...&Cheng, Genwei.(2015).Carbon, nitrogen, and phosphorus storage in alpine grassland ecosystems of Tibet: effects of grazing exclusion.ECOLOGY AND EVOLUTION,5(19),4492-4504.
MLA	Lu, Xuyang,et al."Carbon, nitrogen, and phosphorus storage in alpine grassland ecosystems of Tibet: effects of grazing exclusion".ECOLOGY AND EVOLUTION 5.19(2015):4492-4504.