Comparison of Species Diversity under Heterogeneous Habitats, Determination and Evaluation of Diversity Indices of Desert Riparian Forest Community in Tarim Basin

doi:10.7525/j.issn.1673-5102.2017.06.021

Abstract

Abstract: The choice of diversity index and its measuring index are the basis in the species diversity of plant community. We studied the plant communities of desert riparian forest in the upper reaches of Tarim River. The species richness, diversity, evenness and dominance were compared by taking the important value, coverage and abundance with twelve measuring indices, and the characteristics of community diversity under different habitats were compared by using correlation analysis and principal component analysis. The community species compositions of heterogeneous habitats were significantly difference in desert riparian forest, P.euphratica community was the highest species richness and diversity index in Lunnan Town, P.pruinosa community was the lowest species diversity in three crop, and the spatial heterogeneity of soil water and salt was the main factor to determine the difference of spatial distribution and diversity of desert vegetation. The diversity indices based on important value and coverage had better than that of based on abundance, so the index of important value was more rational to reveal community diversity of desert plant communities. The correlation and principal component analysis indicated the correlation between evenness index and diversity index was higher than that of richness index and diversity index, diversity index was greatly influenced by evenness index, and dominance index was greatly influenced by richness index, indicating that the species diversity index of the desert plant communities was mainly affected by the even degree of species distribution. The Margalef richness index(M_a), Shannon-Weiner(H) and Simpson(D) diversity indices were be used to objectively reflect the diversity characteristics of desert plants community under heterogeneous habitats among twelve diversity index. At the same time, in view of the high habitat heterogeneity of desert plant community, and the community species composition and habitat characteristics were be considered, appropriate diversity index was selected and assembled to objectively reflect the characteristics of community diversity in desert riparian forest in Tarim Basin.

Key words: desert riparian forest, diversity index, species measuring index, important value, coverage, abundance

CLC Number:

Q948

MA Shu-Qin, XUE Zheng-Wei, YANG Li-Li, KANG Jia-Peng, MA Ying-Ying, HAN Lu. Comparison of Species Diversity under Heterogeneous Habitats, Determination and Evaluation of Diversity Indices of Desert Riparian Forest Community in Tarim Basin[J]. Bulletin of Botanical Research, 2017, 37(6): 961-969.

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