张掖市城郊草本沼泽湿地植物多样性研究——张掖市甘州区碱滩镇老仁坝为例

Research on Heihe River Basin Marsh Wetland Plant Diversity:For example of Laorenba,Jiantan Town of Ganzhou District in Zhangye City

对黑河流域湿地自然保护区甘州区碱滩镇老仁坝湿地进行物种多样性研究结果表明,该群落物种的多样性、均匀度和丰富度都较大,其中芦苇在整个群落中的重要值是0.513 6,滨麦的重要值是0.238 8,共占总群落的75.24%,芦苇是优势种,滨麦是亚优势种,该群落的多样性指数与均匀度指数与丰富度指数呈正相关,与优势度指数呈负相关。

The species diversity results of Heihe river basin marsh wetland show that the species diversity, evenness and a- bundance of the community are larger. In the whole species of community , the important value of Phragmitas cornmunis Trin. and Leymus Mollis Trin Hoehst is 0. 5136 and 0. 2388 respectively, which accounted for 75.24% of the total community. Phragmitas communis Trin. is a dominant species and LeymusMollis Trin Hochst is a sub--dominant species. The diversity index is positively correlated with the evenness index and the richness index , and with dominance index is negatively correlated.