兰州大学机构库
Long-Term Grazing Exclusion Reduces Species Diversity but Increases Community Heterogeneity in an Alpine Grassland
Song, Shanshan1; Zhu, Jiangling2; Zheng, Tianli3; Tang, Zhiyao2; Zhang, Fan1; Ji, Chengjun2; Shen, Zehao2; Zhu, JX(朱剑霄)1,2
2020-04-21
Source PublicationFrontiers in Ecology and Evolution   Impact Factor & Quartile Of Published Year  The Latest Impact Factor & Quartile
ISSN2296-701X
Volume8
page numbers12
AbstractExtensive grazing activity is threatening the alpine grassland of the Qinghai-Tibetan Plateau. Evidence has shown that grazing exclusion may change the composition, structure, and functions of grassland ecosystems. However, such effects depend on the intensity and duration of exclusion. We explored the effects of short-term (2 and 4 years) and long-term (9 and 11 years) grazing exclusion on plant height, coverage, and diversity and community heterogeneity in the alpine grassland of the Qinghai-Tibetan Plateau. We found no difference in plant diversity between short-term grazing exclusion and control. However, long-term grazing exclusion reduced species richness and increased the Simpson dominance index. This decrease in plant species richness was mainly attributable to the decrease in common species richness (defined as species with a relative coverage of 1 similar to 5%). In addition, community heterogeneity (coefficient of variation, CV) was significantly higher in long-term grazing exclusion than in controlled plots. Structural equation modeling (SEM) demonstrated that long-term grazing exclusion increased the community heterogeneity mainly by reducing species diversity. These results suggest that the effects of grazing exclusion on the composition, structure, and community spatial heterogeneity of the alpine grassland ecosystem are dependent on exclusion duration. Grazing activity may maintain the high biodiversity and community stability of the alpine grassland in the harsh environment of the Qinghai-Tibetan Plateau.
Keywordcommunity composition community structure grazing exclusion Qinghai-Tibetan Plateau spatial heterogeneity
PublisherFRONTIERS MEDIA SA
DOI10.3389/fevo.2020.00066
Indexed BySCIE
Language英语
Funding ProjectNational Key Research and Development Program of China[2019YFC0507704][2017YF0503906] ; National Natural Science Foundation of China[31700374] ; Fundamental Research Funds for the Central Universities[lzujbky-2018-ct02][lzujbky-2019-76]
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEcology
WOS IDWOS:000531597200001
PublisherFRONTIERS MEDIA SA
Original Document TypeArticle
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/406076
Collection兰州大学
草地农业科技学院
Corresponding AuthorZhu, Jiangling; Zhu, Jianxiao
Affiliation
1.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Grassland Agroecosyst, Lanzhou, Peoples R China
2.Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Key Lab Earth Surface Proc,Minist Educ, Beijing, Peoples R China
3.MOT, Environm Sci & Technol Res Ctr, Tianjin Res Inst Water Transport Engn, Tianjin, Peoples R China
First Author AffilicationCollege of Pastoral Agriculture Science and Technology
Corresponding Author AffilicationCollege of Pastoral Agriculture Science and Technology
First Signature AffilicationCollege of Pastoral Agriculture Science and Technology
Recommended Citation
GB/T 7714
Song, Shanshan,Zhu, Jiangling,Zheng, Tianli,et al. Long-Term Grazing Exclusion Reduces Species Diversity but Increases Community Heterogeneity in an Alpine Grassland[J]. Frontiers in Ecology and Evolution,2020,8.
APA Song, Shanshan.,Zhu, Jiangling.,Zheng, Tianli.,Tang, Zhiyao.,Zhang, Fan.,...&Zhu, Jianxiao.(2020).Long-Term Grazing Exclusion Reduces Species Diversity but Increases Community Heterogeneity in an Alpine Grassland.Frontiers in Ecology and Evolution,8.
MLA Song, Shanshan,et al."Long-Term Grazing Exclusion Reduces Species Diversity but Increases Community Heterogeneity in an Alpine Grassland".Frontiers in Ecology and Evolution 8(2020).
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