万泉河雅寨流域水生生物资源调查与多样性分析

为了掌握万泉河流域水生生物多样性及生态系统的健康状况，以万泉河雅寨流域水生生物作为研究对象，采用实地监测、市场调查、走访了解等方法对该流域的水生生物及相关的生态学进行系统研究。调查结果表明: 万泉河雅寨水域水质较好，处于地表水Ⅲ类标准，水生生物的种类和数量较多，生物量较高。在万泉河雅寨流域设置的6个采样点中，共采集到浮游植物7门137种，其中绿藻门种数最多，有60种，占种数的40.80%；浮游动物6类30种，其中轮虫类种数最多，有13种，占种数的43.33%；底栖动物4类14种，其中节肢动物种数最多，有6种，占种数42.86%；鱼类12目41科68属82种 ，鲈形目和鲤形目的数量最多，分别占总数的45%和27%；水生维管束植物18科48种，其中禾本科植物种类最多，有12种，占种类的25%。笔者结合浮游动植物、底栖动物、鱼类多样性指数综合分析，判断出万泉河雅寨段水生生物多样性丰富。

Survey and diversity analysis of aquatic bioresources in Yazhai section of Wanquan River Basin

Wanquan River Basin constitutes the most important ecological barrier of Hainan province, and its ecological environment in the national economy of Hainan province and social development plays a pivotal role. However, the aquatic biological research in the basin has been less made in recent years, which greatly affected the ecological environment protection and species conservation in the basin. Therefore, a survey was made of the aquatic species and their related ecology in Yazhai section of Wanquan River Basin by using the methods of field monitoring, market survey and interview. The survey showed that the water at the Yazhai section of Wanquan River is high in quality, meeting the Class 3 of the national surface water standards, and is abundant in aquatic species with high biomass. Among the six sampling sites set up in the Yazhai section of Wanquan River Basin a total of 137 phyla of phytoplankton were collected, of which green algae species are the most abundant (60 species), accounting for 40.80% of the total phytoplankton species, and 6 types and 30 species of zooplankton were collected, of which rotifer species were most abundant (13 species), accounting for 43.33% of the total zooplankton species. There were 4 types and 14 species of zoobenthos collected, of which arthropod species were most abundant (6 species), accounting for 42.86% of the total zoobenthos species. There were 12 orders, 41 families, 68 genera and 82 species of fish collected, of which the orders of perch and cyprinid were most abundant, accounting for 45% and 27% of the total fish orders, respectively. There were 18 families and 48 species of aquatic vascular plants, of which gramineous plant species were most abundant (12 species), accounting for 25% of the total species of aquatic vascular plants. Comprehensive analysis of the diversity indexes of zooplankton, phytoplankton, zoobenthos and fish showed that the aquatic biodiversity in Yazhai section of Wanquan River is rich.