Influence of Two Invasive Plants on Local Plant Biodiversity in Xinjiang
[ Objective and Method] Square intercept method was used to survey the two invasive plants Solanum rostratum and Xanthium spinosum in desert grassland and oasis in the hope of finding out their effects on the local plant species biodiversity. In a field where the invasive plants were widely distributed, 20 plots invaded by these species were placed and between them with a distance of 5 m, 20 other plots which were not invaded by these species were selected as the control plots. Importance value, Simpson index and Pielou index were employed to analyze the pattern of local community biodiversity. [Result]There were total of 6 families and 14 species in all the plots that contained S. rostratum, but the control plots had 7 families and 29 species. There were total of 11 families and 31 species in all the plots that contained X. spinosum, while in control plots there were 9 families and 23 species. The importance value in most native plants was lower, only Polygonum aviculare and Tribulus terrestris had slightly lower importance value invaded by S. rostratum. X. spinosum plots had Setaria vividis. Meantime, Simpson index and Pielou index in the two invasive plants were lower than those in the control plot. [ Conclusion ] It is indicated that the invasion of S. rostratum and X.spinosum had effects on the structure and composition of the native plants community, resulting in reduced species diversity.
国家科技期刊平台
NSTL
万方数据
维普
