环罗源湾河流浮游植物调查及水质分析研究

摘要

This paper investigated the composition, density, biomass and biological diversity index of phytoplankton in the es-tuaries of nine rivers around Luoyuan Bay in late July 2012, combining with analysis on water physical and chemical indexes in each sampling point.The results showed that a total of 116 species which belong to 47 genera of 5 phyla were identified in those rivers.During the study period, the plankton density varied from 466.27 to 40 546.00 ind./L, biomass varied from 0.000 5 to 0.463 4 mg/L.Shannon-Wiener diversity index varied from 2.50 to 4.65, and species evenness index varied from 0.52 to 0.97.The water quality in the rivers was in II-V class, and their trophic levels from oligotrophic to mesotrophic.%2012年7月下旬对环罗源湾主要河流入海口处9个采样点的浮游植物组成、密度、生物量以及生物多样性指数进行调查，并与水质理化参数相结合分析了各采样点的水质情况。结果表明：9个采样点共发现浮游植物3门47属116种；浮游植物的密度范围在466.27～40546．00个/L之间，生物量在0.0005～0.4634 mg/L之间；Shannon-Wiener多样性指数的波动范围为2.50～4.65，物种均匀度指数的波动范围分别为0.52～0.97；研究区域的水质居于II～V类，其水质营养等级情况为贫营养至中营养。