干旱区生态环境知识资源中心(Arid): Grazing exclusion-induced shifts, the relative importance of environmental filtering, biotic interactions and dispersal limitation in shaping desert steppe communities, northern China

Arid

	Grazing exclusion-induced shifts, the relative importance of environmental filtering, biotic interactions and dispersal limitation in shaping desert steppe communities, northern China
	Wang Xing; Song Naiping; Yang Xinguo; Wang Lei; Chen Lin
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2018
卷号	10 期号:3 页码:402-415
英文摘要	Grazing exclusion is one of the most efficient approaches to restore degraded grassland but may negatively affects the recovery of species diversity. Changes in plant species diversity should be a consequence of the ecological assembly process. Local community assembly is influenced by environmental filtering, biotic interactions, and dispersal. However, how these factors potentially contribute to changes to species diversity is poorly understood, especially in harsh environments. In this study, two management sites within a Stipa breviflora desert steppe community (typical natural steppe) were selected in northern China. In one of the two management sites, grazing has been excluded since 2010 and in the other with open grazing by sheep. In August 2016, three plots were established and 100 sampling units were created within each plot in a 5 m*5 m area at the two management sites. To assess the effects of grazing exclusion on S. breviflora steppe, we analyzed the vegetation biomass, species diversity, soil organic carbon, and soil particle size distribution using paired T-tests. In addition, variation partitioning was applied to determine the relative importance of environmental filtering and dispersal limitation. Null mode analysis was used to quantify the influence of biotic interactions in conjunction with EcoSim niche overlap and co-occurrence values. Our results demonstrated that (1) species diversity significantly decreased and the main improvements in soil quality occurred in the topsoil 0-10 cm after the grazing exclusion; (2) environmental filtering was important for community assembly between grazed and fenced grassland and this appears particularly true for soil particle size distribution, which may be well correlated with soil hydrological processes; and (3) however, competitive exclusion may play a significant role within the exclusion. The multiple pathways of assembly may collectively determine negative effects on the restoration of species diversity. Therefore, designers should be aware of the risk of reducing grazing exclusion-induced species diversity and account for manipulating processes. This in turn will reduce dominant species and promote environmental heterogeneity to maximize species diversity in semi-arid regions.
英文关键词	community assembly environmental filtering Stipa breviflora desert steppe semi-arid grassland
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6230979
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335950
作者单位	Wang Xing, Ningxia University;;School of Agriculture, Ningxia University, Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China;;, Yinchuan;;Yinchuan, ;; 750021;;750021.; Song Naiping, Ningxia University;;School of Agriculture, Ningxia University, Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China;;, Yinchuan;;Yinchuan, ;; 750021;;750021.; Yang Xinguo, Ningxia University, Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China, Yinchuan, Ningxia 750021, China.; Wang Lei, Ningxia University, Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China, Yinchuan, Ningxia 750021, China.; Chen Lin, Ningxia University, Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China, Yinchuan, Ningxia 750021, China.
推荐引用方式 GB/T 7714	Wang Xing,Song Naiping,Yang Xinguo,et al. Grazing exclusion-induced shifts, the relative importance of environmental filtering, biotic interactions and dispersal limitation in shaping desert steppe communities, northern China[J],2018,10(3):402-415.
APA	Wang Xing,Song Naiping,Yang Xinguo,Wang Lei,&Chen Lin.(2018).Grazing exclusion-induced shifts, the relative importance of environmental filtering, biotic interactions and dispersal limitation in shaping desert steppe communities, northern China.Journal of Arid Land,10(3),402-415.
MLA	Wang Xing,et al."Grazing exclusion-induced shifts, the relative importance of environmental filtering, biotic interactions and dispersal limitation in shaping desert steppe communities, northern China".Journal of Arid Land 10.3(2018):402-415.