Responses of arid plant species diversity and composition to environmental factors

Abstract An oasis is a unique natural landscape in arid and semi-arid areas, significant for regulating regional microclimates hydrological processes deserts. However, little known regarding the response of plants communities to various environmental factors. Nineteen sample plots (50 m × 50 m) were selected Daliyabuyi Oasis Taklimakan Desert hinterland based on location groundwater monitoring wells 76 vegetation quadrats (25 25 established. A two-way indicator species analysis, Mantel test, detrended correspondence canonical analysis (CCA), hierarchical partitioning used provide an in-depth community classification, composition, interpretation oasis. generalized linear model was verify results which showed that current could be divided into four types according dominant species, controlled by soil moisture. Measurement composition distribution differences between diversity individual types. Variations depth affects patterns sensitive richness, while degree surface water disturbance pattern evenness. Moreover, CCA ordination map characteristics have their own preferences habitat gradients. The study concluded dominance are not dominated single factor. There scale effect different resource maintaining characteristics.