EFFECTS OF SOIL ENVIRONMENTAL FACTORS ON VEGETATION COMMUNITIES IN THE DEGRADED TARIM RIVER WETLAND

文献类型： 外文期刊

第一作者： Dong, Peng

作者： Dong, Peng;Li, Ming;Jiang, Jiyuan;Zhang, Jun;Chen, Qiling;Zhu, Yaojun

作者机构：

关键词： Tarim River;vegetation community;TWINSPAN;DCA;DCCA

期刊名称：FRESENIUS ENVIRONMENTAL BULLETIN （ 影响因子：0.489； 五年影响因子：0.479 ）

ISSN： 1018-4619

年卷期： 2017 年 26 卷 10 期

页码：

收录情况： SCI

摘要： The distribution of wetland vegetation is significantly influenced by soil environmental factors. Few studies have been conducted on the restoration processes used on the degraded wetlands of the Tarim River. We surveyed the vegetation communities of the Tarim River Basin, and their responses to soil environmental factors using two methods of indicator species classification (TWINSPAN): detrended correspondence analysis (DCA) and detrended canonical correspondence analysis (DCCA) ordination. Results showed that Tarim River wetland species were limited, the community structure was simple, and there were no endemic species. There were only 34 plant species in the study area, and 12 families were represented by only 1 species. Wetland flora in the Tarim River Basin consisted mainly of herbaceous plants, with only a few shrub and tree species. These results show that the degradation of the Tarim River wetland is severe. The vegetation community was divided into 4 formations using TWINSPAN, and 3 formations using DCA. Both methods showed clear distribution boundaries, and the DCA also provided a good reflection of the vegetation and soil environment. The DCCA ordination showed that the distribution of vegetation in the study area was affected by a combination of elevation, salinity, and soil moisture. Pairwise correlations also showed that vegetation diversity was significantly correlated with elevation. Therefore, we suggest that the process of restoring the degraded wetland cannot solely rely on restoring the hydrological conditions in the Tarim River Basin, as topography and soil salinity must also be taken into account. These results should be integrated into the vegetation restoration and management plans of the Tarim River wetland and could be important for the ecological management of the Tarim River Basin.

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