滦河口近岸海域浮游植物群落结构

1999-2000年对滦河口近岸海域浮游植物群落结构进行了春、夏、秋、冬4个航次调查，描述了浮游植物的种类组成、细胞数量、生物多样性指数、均匀度指数等群落特征，分析了浮游植物群落的季节变化及平面分布趋势。结果显示：4个航次共检测出浮游植物70种，以硅藻为主；不同季节优势种有交叉演替现象；浮游植物细胞数量季节变化显著；浮游植物平面分布特征表现为春、夏、秋呈明显的斑块状分布，冬季浮游植物分布呈近岸水域高、远岸水域低的特征；优势种明显，生物多样性指数(H’)及均匀度指数(J)偏低。

Community of phytoplankton in Luanhe Estuary

The phytoplanktonic community in Luanhe Estuary, including the species, distribution, abundance, Shnnon-Weaver index, and Pelou's index was studied in spring, summer, autumn, and winter during 1999 to 2000. The seasonal changes of the community and the spatial distribution of abundance were also analyzed. The results showed that 70 species present in the investigated area, and most of them were diatom the dominant species were quite different and the abundance changed significantly in different seasons.The highest abundance appeared in winter and the lowest in spring. the distribution of phytoplankton followed the patchy distribution style in spring, summer, and autumn, and showed a high to low gradient from the coastal area to the offshore area in winter. Shannon-Weaver index and Pielou's index were comparative lower.