Study on the Distribution Pattern of Species Diversity and Phylogenetic Diversity of Plant Community in Yanqi Hola Mountain Along the Altitude Gradient
In order to reveal the altitudinal distribution characteristics and maintenance mechanisms of species diversity and phylogenetic diversity of plant communities in arid desert areas.In this study,we analyzed the dis-tribution characteristics of species diversity and phylogenetic diversity of plant communities along the altitudinal gradient and their driving factors,taking the desert shrub communities in the Hola Mountains as object.The results showed that the Margalef index,Simpson index,Shannon-Wiener index and phylogenetic diversity index showed a single-peak trend with the increase of altitude,and the community phylogenetic structure changed from divergence to aggregation.The phylogenetic diversity index was positively correlated with the Margalef index,Simpson index and Shannon-Wiener index.The net genealogical relatedness index was nega-tively correlated with the Margalef index,but positively correlated with the Simpson index and the Pielou index.The net closest interspecific relatedness index was negatively correlated with the Margalef index.The net closest interspecific kinship index was significantly negatively correlated with Margalef index but positively correlated with Pielou index.Soil water content,total salt,total nitrogen,and quick-acting phosphorus content were important drivers of species diversity and phylogenetic diversity with the elevation gradient.Species diver-sity and phylogenetic diversity of desert scrub communities in the Hola Mountains are closely related,and soil factor is an important factor influencing their changes along the altitudinal gradient.
NETL
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万方数据
