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Inner Mongolia University (2021)

Study on the Community Diversity and Population Spatial Pattern of Salsola Passerina in the Desert Area of Inner Mongolia

贾喆亭

Titre : Study on the Community Diversity and Population Spatial Pattern of Salsola Passerina in the Desert Area of Inner Mongolia

Auteur : 贾喆亭

Grade : Master 2021

Université : Inner Mongolia University

Résumé partiel
As a world environmental problem,land desertification has threatened the sustainable development of human beings.Land desertification has destroyed the natural environment and biodiversity.To prevent and control land desertification and protect ecological environment are the primary problems of economic construction in Inner Mongolia desert area.Salsola passerina is an important dominant species or constructive species in Inner Mongolia desert area,which has strong tolerance to arid and barren habitats.Salsola passerina community is also a very important grassland type in desert area,and has important value for ecological construction in desert area.In this paper,the species composition,structural characteristics,quantitative characteristics,species diversity and their relationship with environmental factors of 10 Salsola passerina communities in different habitats in desert area of Inner Mongolia were studied,and the spatial distribution pattern of Salsola passerina population was analyzed.In order to study the spatial distribution pattern of other plant populations and provide suggestions for the protection and tending of Salsola passerina population.The results show that:1)There are 35 species of angiosperms,belonging to 12 families and28 genera in the community.Most of the species in the community are Chenopodiaceae,Zygophyllaceae,and Gramineae.Shrub and subshrubs were the main life forms in Salsola passerina community.There are 8shrubs,6 subshrubs,12 perennial herbs and 9 annual herbs.The functional structure and stability of Salsola passerina community in Inner Mongolia desert are mainly determined by shrub and subshrub layers.The density,biomass,coverage of Salsola passerina community showed a decreasing trend with the decrease of annual rainfall.Salsola passerina community is often composed of Reaumuria songarica,Nitraria sphaerocarpa,Potaninia mongolica,Cleistogenes songorica,Allium polyrhizum and so on.2)The community survey results were analyzed using four diversity indexes,and the correlation analysis with environmental factors showed that the community diversity level of Salsola passerina in the desert area of Inner Mongolia is low,there are significant differences between the plots due to the different effects of climate,soil and other factors.

Mots clés : Inner Mongolia Desert Area ;Salsola passerina ;Community diversity ;Spatial distribution pattern ;

Présentation (CNKI)

Page publiée le 6 novembre 2021