以植被生物完整性评价梁子湖湖滨湿地生态系统健康

发布时间：2018-06-08 04:02

本文选题：植被生物完整性 + 梁子湖　；参考：《长江流域资源与环境》2015年08期

【摘要】：湖滨湿地植被是湖滨带生态系统的主要特征,以湖滨湿地植被为对象可评价湖滨带生态系统健康状况。通过对梁子湖湖滨湿地植被的详细调查,共鉴定出植物182种,隶属于52科128属,其中湿生植物147种,水生植物35种。水生植物中有20种挺水植物,6种浮叶植物和9种沉水植物。采用植被生物完整性(VIBI)方法评价梁子湖湖滨湿地生态系统健康,对21个备选指标进行筛选分析,建立了以挺水植物物种数、多年生植物物种数、外来物种百分比、香农多样性指数、植物区系质量指数FQAI、耐受性物种百分比、敏感性物种百分比为核心指标的评价体系,三分法对指标进行赋值,将梁子湖湖滨湿地划分为健康、良好、一般和较差4个等级。评价结果表明,梁子湖湖滨湿地22个调查位点中,处于健康状态的有3个位点,良好6个,共占总位点数的41%,一般和较差分别为7个和6个,共占59%。总体上看,东梁子湖和牛山湖湖滨湿地位点健康状况较好,而西梁子湖湖滨湿地差异性较大,山坡湖南部湖湾和前江大湖北部位点健康状况良好,张桥湖湖滨湿地健康状况一般,评价较差的6个位点集中在宁港湖周围和前江大湖南部沿岸。底质和人类活动如水位调控、围网养殖、放牧等是影响梁子湖湖滨湿地植被生物完整性的主要原因。
[Abstract]:Lakeshore wetland vegetation is the main characteristic of lakeshore ecosystem. Taking lakeside wetland vegetation as an object, the health status of lakeside wetland ecosystem can be evaluated. Based on the detailed investigation of the wetland vegetation along Liangzi Lake, 182 species of plants were identified, belonging to 128 genera of 52 families, including 147 species of wet plants and 35 species of aquatic plants. There are 20 species of water plant, 6 species of floating-leaf plant and 9 species of submerged plant. Using the method of vegetation biological integrity (VIBI) to evaluate the ecosystem health of Liangzi Lake lakeshore wetland, 21 alternative indexes were screened and analyzed, and the species numbers of octopus plants, perennial plants and the percentage of alien species were established. Shannon diversity index, floristic quality index FQAI, percentage of tolerant species and percentage of sensitive species were the evaluation system. Average and poor 4 grades. The results showed that among the 22 sites in Liangzi Lake lakeside wetland, 3 sites were healthy, 6 sites were good, accounting for 41% of the total site points, 7 sites and 6 sites were normal and poor respectively, accounting for 599.00% of the total number of sites. On the whole, the health status of the wetland sites of East Liangzi Lake and Niushan Lake is good, while that of West Liangzi Lake Wetland is quite different. The health status of Zhangqiao Lake lakeshore wetland was general, and the six sites with poor evaluation were concentrated around Ninggang Lake and along the coast of Qianjiang River. Sediment and human activities, such as water level regulation, seine culture, grazing and so on, are the main factors that affect the biological integrity of wetland vegetation in Liangzi Lake.
【作者单位】：华中师范大学生命科学学院;
【基金】：国家试点湖泊生态环境保护项目梁子湖专题,“十二五”国家重大专项(2013ZX07104-004-03)
【分类号】：X826

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