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Species Diversity and Spatial Variation of Plant Community in the Southern Part of the Gurbantunggut Desert

Author: LiuZhongQuan
Tutor: LiuTong
School: Shihezi University
Course: Botany
Keywords: Gurbantunggut desert Detrended canonical correspondence analysis Two - way indicator species analysis Species diversity
CLC: Q948
Type: Master's thesis
Year: 2011
Downloads: 22
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Abstract

Gurbantunggut desert in southern plant communities distribution characteristics of different life forms of plants, short-lived plants relationship with the environment, as well as two years between the short-lived plant diversity changes, the study focuses on plant species diversity in these studies will be cataloged in the region vegetation diversity, long-term dynamic monitoring of desert vegetation, focus on the establishment of the protected areas in the desert, desert vegetation protection and sustainable management, recovery and reconstruction support. The main conclusions are as follows: a survey analysis of the Gurbantunggut Desert southern 35 samples of 3.86 × 104m2 of plant diversity. Total of 93 species belonging to 24 families, 74 genera, Chenopodiaceae Chenopodiaceae, Asteraceae, Compositae, Cruciferae Cruciferae, Leguminosae Leguminosae dominant families, respectively, accounting for 19.35% of the total number of the major species, 17.20%, 11.83% and 9.68%. Ephemeral plants accounted for 53.76% of the life form, long vegetative period herbaceous accounted for 22.58%, and the category accounted for 16.13% of the bushes and trees. From the important value point of view, the bushes and trees and accounted for 30.93%, the ephemeral plants accounted for 45.73%. 2 using the method of two-way indicator species, will be the Gurbantunggut Desert ephemeral plants in the south is divided into seven communities. Detrended canonical correspondence analysis (DCCA) to find slope position, latitude and longitude, annual precipitation and precipitation in March-May impact on species distribution. 3 different living plants vary up the distribution of the warp and weft, warp, the number of short-lived plant species and important values ??With Longitude increase (from west to east) significantly increased the importance of long vegetative period herbs and bushes and trees like value decreases. Zonal regard, the number of short-lived plant species and important values ??with increasing latitude (from south to north) decreases long vegetative period herbs and bushes and trees important value, the number of species did not change significantly. Different life form of plant cover differences between the 4 different slope positions are bushes and trees class gt; a short nutrition Plant gt; a long nutritional Plant gt; perennials. The average density of different life forms of plants: the long vegetative period and short vegetative phase density is relatively large, the bushes and trees the class and perennials density is relatively small. Overall the top of the hill the density smaller two-slope density distribution showed significant selectivity. Two years of different plant communities in the short-lived plant cover differences are very significant performance for the 2010 plant cover larger; density changes as well as the diversity index is not very obvious.

Species Diversity and Spatial Variation of Plant Community in the Southern Part of the Gurbantunggut Desert

Abstract

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