摘要
根据1982—1983年调查资料,阐述了舟山群岛浮游植物和浮游动物的类群组成和主要种类,共有藻类162′属,动物256种。舟山群岛淡水浮游生物具有以下特点:各水体周年的生物量都较高,藻类中咸淡水种类较多,原生动物的砂壳纤毛虫种类多,且数量大。6—11月在水库、溪流水体普遍出现胶鞘轮虫。迈氏三肢轮虫是优势种群。轮虫是决定水体浮游动物生物量的主要因素。本文从两个水体渔产潜力估算,提出了开发利用生物资源的初步设想。
This paper presents the results of limnological survey of Zhoushan Archipelago during 1982—1983.The archipelago's geographical position is 121°21′—123°08′E, 29°34′—31°02′N. consisting of 670 off-shore islands.The chief planktons belong to 162 genera of algae, 256 species of zooplankton.From the analysis of the structure and the seasonal distribution of seven water bodies it is showed that the biomass is high in each season. Cyanophyta being the greatest in number, the individual number fluctuation of phytoplankton is apparently affected by that of Cyanopyta. Chtorophyta is the largest in mumber of species and relatively high in biomass, but predominance is not obvious. The standing crop of Euglenoplenophyta and Cryptophyta hava major value in phytoplankton in the ponds and small-sized reservoires in which organic material is rich. Protozoa is the largest in individual number of zooplankton, while the biomass of Rolifera is the greatest. The seasonal fluctuation of zooplankton is actually affected by the fluctuation of the Rotifera.An estimation of fishery potentiality is discussed with two examples of water bodies given.
