汉石桥湿地湿生植物群落多样性研究

Study on Hygrophytic Plant Community Diversity in Hanshiqiao Wetland

以北京市顺义区汉石桥湿地108个样方植物群落样地调查资料为基础,从不同类型、层次的均匀度、丰富度和多样性指数等方面对汉石桥湿地湿生植物群落多样性进行了分析,7—9月核心区样地内的植物种类组成与恢复区有显著差异。核心区中的芦苇、浮萍、紫萍、槐叶萍这4种植物的重要值均大于恢复区。核心区和恢复区的物种丰富度指数均较大,核心区大于恢复区;核心区和恢复区的Alatalo均匀度指数均较小,核心区略大于恢复区;多样性指数存在差异性,核心区的Shannon-Wiener指数略大于恢复区,而Simpson指数明显小于恢复区。一年生草本植物的重要值核心区高于恢复区;漂浮植物的重要值在各生活型中最高,并且核心区明显高于恢复区;多年生草本植物的重要值核心区也高于恢复区。

Based on the data of 108 plant community survey plots in Hanshiqiao Wetland(Shunyi District,Beijing),this paper has analyzed the diversity of the local wet plant community from the aspects of richness,evenness and diversity index of different types and levels.From July to September,the plant species composition in the core plot was significantly different from that in the restoration area.The important values of Phragmites australis,Lemna minor,Spirodela polyrhiza and Salvinia natans in the core area were all higher than those in the restoration area.The species richness index was large in both core and restoration areas,and was larger in the core area than in the restoration area.The Alatalo evenness index of the core area and the restoration area was small,but the core area is slightly larger than the restoration area.Diversity index exhibited variation:the Shannon-Wiener index in the core area was slightly larger than in the restoration area,while the Simpson's index was significantly smaller than in the restoration area.The importance value of annual herbaceous plants in the core area was higher than in the restoration area.The importance value of floating plants was the highest among all life forms,and the core area was significantly higher than the restoration area.The importance value of perennial herbaceous plants was also higher in the core region than in the restoration region.