凡口宽叶香蒲湿地植物群落恢复的研究

 调查观测广东韶关凡口铅锌矿宽叶香蒲(Typha latifolia)湿地的水生植物种类、生物多样性、群落结构及生物量，分析湿地基质的理化性质，探索湿地生态恢复的基本特征。研究结果表明：1) 以宽叶香蒲为优势种的湿地生态系统主要植物有98种，隶属44科，86属。次优势种有：芦苇(Phragmites communis)、茳芏(Cyperus malaccensis)。植物群落水平分布从均匀型向群集型分布格局转化，植物群落空间不均匀性增大。2) 随湿地系统的恢复演替进程，表现为土壤肥力（有机质，N，P，K）明

RESTORATION OF WETLAND PLANT COMMUNITIES DOMINATED BY TYPHA LATIFOLIA

In this paper the species composition, community structure, biomass and species biodiversity of a Typha latifolia wetland at Shaoguan in Guangdong Province (South China) was investigated. The major results are as follows: 1) ninty_eight species belonging to 86 genera were recorded in the community, with Typha latifolia, the major dominant and Phragmites communis and Cyperus malaccensis as secondary dominants; 2) with restoration of the wetland, soil fertility increased significantly: organic matter from 0.54% to 1.17%, N from 0.040% to 0.082%, P from 0.069% to 0.141% and K from 0.71% to 0.82%; 3) species diversity index is negatively correlated with soil organic matter, N, and P content and a significant increase in species richness, biomass and diversity occurred from the wastewater run_on to the effluent side of the community; 4) toxicity of available Pb and Zn in the wetland ecosystem was the major constraint on the restoration of diversity.