文章基本信息

标题：Plant Diversity and its Correlation with the Physicochemical Properties of Soil in Different Gradient Levels in the Riparian Zone of Lijiang River
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作者：Lu Yang ; Wang Dongmei
期刊名称：Nature, Environment and Pollution Technology
印刷版ISSN：0972-6268
出版年度：2016
卷号：15
期号：2
语种：English
出版社：Technoscience Publications
摘要：Riparian zones are the most diverse and complex biophysical habitats being threatened by anthropogenicactivities. Degradation of riparian vegetation is a serious problem. This study conducted a field standardsample plot investigation and experiments to evaluate plant diversity and the physicochemical properties ofsoil in different gradient levels of a riparian zone. The distribution patterns of plants and their correlation withthe physicochemical properties of soil were also analysed. This study provides a theoretical basis for ecologicalprotection, vegetation recovery, and vegetation reconstruction in a riparian zone in Guangxi and in the wholekarst region of southwestern China. Ten typical sample plots in the riparian zone of Lijiang River in GuilinCity, Guangxi Province, were selected. Various parameters, including quantitative characteristics of theplots and physicochemical properties of soil, were analysed. Results revealed that species abundance,diversity, and richness, as well as evenness indexes of plant communities in the riparian zone increased withthe increase in gradient zone variation. The species diversity, Shannon-Wiener index, and evenness indexesof the plants in the herbal zone did not significantly differ from those in the shrub zone. Species richnessindex also significantly increased. In addition, the species richness indexes in the shrub zone did notsignificantly differ from those in the arbor zone. Physicochemical analysis revealed that the soils in thegradient zones were primarily composed of neutral and slightly alkaline sand. Soil bulk density initially increasedand then decreased with the increase in relative altitude. The organic matter contents in the soil also increased.Changes in total nitrogen, total potassium, quick-acting potassium, and total phosphorus were not significant.Multiple regression analysis indicated high fitting degrees of total biomass, diversity, and environmentalelements. Moreover, the contribution of soil texture on diversity was higher than that of soil nutrients.