Abstract:To evaluate the changes in biodiversity and soil properties during vegetation restoration, the plant diversity and soil characters among five habitats, such as flood land, gravel land, reed land, Saccharum arundinaceum land and sand land, in riparion zone of Wenjiang section of Jinma River were comparative analyzed in 2015 and 2018. The results showed that there were 113 species of herbs in Wenjiang riparion zone, belonging to 80 genera and 32 families in 2015, and 161 species of herbs and shrubs, belonging to 118 genera and 57 families in 2018. With shrub layer added in 2018, the changes in community structure of flood land and S. arundinaceum land were the most significant, and that in gravel land was the smallest. In 2018, except for the flood land and S. arundinaceum land, the biodiversity indexes had little change. The richness index (D), Shannon-Wiener diversity index (H), Simpson dominance index (H') and Pielou evenness index (Jsw) showed the same variation trend among habitats, with the biggest in gravel land and the smallest in reed land. In 2018, the soil water contents (SWC) of flood land and S. arundinaceum land were significantly lower than that of other habitats, the soil bulk density (BD) of S. arundinaceum land was the lowest, but the contents of TN and OM were the biggest. Combining species matrix and environment matrix, redundance analysis (RDA) showed that BD, SWC, OM had the most significant correlation with species diversity. SWC and soil pH were the main effect factors in the gravel land and sand land, while OM in the flood land and S. arundinaceum land. On the whole, after forbidding sand mining, each habitat showed different degrees of restoration, and the restoration effect of S. arundinaceum land was the most significant. These would be conductive to providing theoretical basis for continuously improving the current situation of soil quality and promoting the restoration of riparian ecosystem in the Wenjiang section of Jinma River.
