文献类型：期刊文献

英文题名：Plant Diversity Responses of Ulmus pumila L. Communities to Grazing Management in Hunshandak Sandy Land, China

作者：Huang, Wenda[1] He, Yuanzheng[1] Zhao, Xueyong[1] Yang, Hongxiao[2] Gan, Honghao[3] Zhao, Xin[1]

第一作者：Huang, Wenda

通信作者：Huang, WD[1]

机构：[1]Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Naiman Desertificat Res Stn, Lanzhou 730000, Peoples R China;[2]Qingdao Agr Univ, Coll Resource & Environm, Qingdao 266109, Peoples R China;[3]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China

年份：2023

卷号：15

期号：12

外文期刊名：DIVERSITY-BASEL

收录：;Scopus(收录号：2-s2.0-85180674491);WOS:【SCI-EXPANDED(收录号:WOS:001132846400001)】；

基金：The authors thank all the members of the 2017FY100205 project team, Naiman Desertification Research Station, and Key Laboratory of Stress physiology and Ecology, Gansu Province, Northwest Institute of Eco-Environment and Resources, China Academy of Sciences (CAS), for their help in field work and laboratory studies.

语种：英文

外文关键词：species diversity; genetic diversity; climatic factors; sparse forest grassland; Inner Mongolia Plateau

摘要：Biodiversity is sensitive to climate change and human activity. Grazing management practices have a profound impact on plant species-genetic diversity in grassland and woodland communities. In this study, we explored the responses of species and genetic diversity to grazing in Ulmus pumila L. communities in the Hunshandak Sandy Land, analyzed the relationship between species and genetic diversity, and revealed the effects of climate factors on them. We found that the dominant species were Spiraea trilobata, Caragana microphylla and Artemisia intramongolica in U. pumila communities. Plant species richness in the banned grazing (BG) and seasonal grazing (SG) communities was significantly higher than that in the delayed grazing (DG) community. Plant Simpson's diversity index showed a downward trend with increasing grazing duration. There was no difference in allelic richness in nuclear DNA (nrDNA) of U (U. pumila) and chloroplast DNA (cpDNA) of NU (other dominant species besides U. pumila) among grazing management types. The expected heterozygosity of U in nrDNA and cpDNA was significantly affected by grazing management, and the trend was BG > SG > DG. The genetic diversity of U was lower than that of NU. The genetic diversity characteristics of U in cpDNA were lower than those in nrDNA. The analysis of molecular variance (AMOVA) showed that 98.08% of the variation in U and 95.25% of the variation in NU was attributed within populations and the differences within grazing management types were 13.35% in U and 24.08% in NU (p < 0.001). The species richness of communities was positively correlated with the genetic diversity of U, NU and all dominant species (U + NU) in communities. The nineteen climatic variables together explained 94.24% and 79.08% of the total variation in U and NU genetic and species diversity. The mean temperature of the warmest quarter and temperature seasonality were the main factors affecting genetic diversity (p = 0.046; 0.01), while the maximum temperature of the warmest month was the main factor affecting species diversity (p = 0.05).