HunShanDaKe sand east edge of vegetation ecological niche and interspecific association studies

Abstract

Plant communities show some kind of interspecific relationship and different niche characteristics through the sharing and competition of resources in the living environment, which is of great significance for interpreting the response mechanism of vegetation to the environment. This study analyzes the niche breadth, niche overlap, and interspecific relationships of plant species in the study area by using ecological statistics. Although there are certain correlations among the species in the Hunshandake Sandy Land, the relationship is relatively loose and the whole is in an unstable stage; the plants with relatively wide niche under three types of site types in the eastern margin of the Hunshandake Sandy Land The species are Quercus mongolica (Betula platyphylla), Malus baccata + Spiraea pubescens, Ribes diacanthum (Ostryopsis davidiana) of the leeward slope; Ulmus pumila+ Ribes diacanthum and Siberian apricot (Ribes pulchellum ) on the windward slope; Ulmus pumila and Malus baccata + Spiraea trilobata, Rosa davurica (Kochia prostrata) on the hilly land. The combination of the leeward slope niche overlap is Betula platyphylla and Malus baccata + Spiraea pubescens, Ostryopsis davidiana; Ulmus pumila + Ribes pulchellum, Kochia prostrata on the windward slope; the hilly land for Malus baccata, Ulmus pumila + Spiraea trilobata.