摘要
沟渠是银川平原最重要的生态廊道,发挥着生物多样性保育和多种湿地生态功能。在沟渠植物群落及其生境调查的基础上,计算了Shannon-Weiner物种多样性指数、Margalef物种丰富度指数、Simpson物种优势度指数和Pielou物种均匀度指数。研究结果表明,维管植物多样性指数一般呈现排水沟道高于灌溉渠道、上游沟道优于下游沟道的特征。这种特征是沟渠的水文条件、水利工程建设方式、水土理化性质等综合作用的结果,底泥和边坡土壤的含盐量与含水量,是影响沟渠植物多样性的直接生境因素。
The canals and ditches are the important ecological corridors in Yinchuan Plain and played the biodi- versity conservation and construction rehabilitate of ecological functions. Based on the plant community and its habitat survey, this paper calculated many kinds of species diversity indices including in Margalef species richness index, Simpson species dominance index, the Shannon-Weiner species diversity index and Pielou spe- cies evenness index. The results showed that plant diversity of tracheophytes was generally higher in the ditch- es than in the irrigation canals and better in the upstream ditches than those in the downstream in Yinchuan Plain. These characteristics were determined by combined factors, including hydrology, hydraulic construc- tion, physical and chemical properties for water and soil. On the other hand, the salt and moisture contents of bottom mud and soil on slope are the direct habitats which make the plant diversity differences.
出处
《湿地科学》
CSCD
北大核心
2013年第3期352-358,共7页
Wetland Science
基金
宁夏回族自治区环境保护基金项目(20100813)资助
关键词
沟渠
植物多样性
分布特征
银川平原
canals and ditches
plant diversity
distribution characteristics
Yinchuan Plain
