基于植被完整性指数的鄱阳湖湿地生态健康评价

发布时间：2018-04-25 21:40

  本文选题：植被完整性指数 + 健康评价　； 参考：《生态学报》2017年15期

【摘要】：基于鄱阳湖湿地30个采样点的植被调查数据,利用植被完整性指数法(V-IBI)评价鄱阳湖湿地生态健康状况。通过分布范围分析、判别能力分析和相关性分析,从35个候选生物参数中筛选出6个核心参数,利用比值法对核心参数赋值并累加求得各采样点V-IBI分值,以所有采样点95%分位数值为最佳期望值建立评价标准划分健康等级。结果显示:鄱阳湖湿地生态健康状况总体较好,30个采样点中6个为非常健康(V-IBI≥5.01),7个为健康(4.38≤V-IBI5.01),8个为一般(3.74≤V-IBI4.38),7个为差(3.10≤V-IBI3.74),2个为极差(V-IBI3.10),呈现出西部优于东部,北部优于南部的空间差异。V-IBI与景观发展强度指数(LDI)和栖息地环境质量评价指数(QHEI)呈显著相关性,表明V-IBI方法对鄱阳湖湿地生态健康状况评价结果合理有效,可作为鄱阳湖湿地生态监测的重要手段。
[Abstract]:Based on the vegetation survey data of 30 sampling sites in Poyang Lake wetland, the ecological health status of Poyang Lake wetland was evaluated by vegetation integrity index method (V-IBI). By analyzing the distribution range, discriminant ability and correlation, 6 core parameters were selected from 35 candidate biological parameters, and the V-IBI scores of each sampling point were obtained by the ratio method. Use 95 quartile of all sampling points as the best expected value to establish evaluation criteria for health grading. The results showed that the ecological health status of the wetland in Poyang Lake was good, 6 of the 30 sampling sites were very healthy, 7 were healthy, 4.38 鈮，

本文编号：1803088