The Study On Seasonal Changes And Influencing Factors Of Plankton Distribution In Baishan Reservoir And The Surrounding Rivers

Jingyu, Jilin nuclear power plant, started in 1986. Site has been selected to enter the preparation stage of environmental impact assessment. We have accepted nuclear power plants around the water bodies of water ecological survey and assessment tasks, Research in aquatic ecosystems will be an important producer of phytoplankton and primary consumers of zooplankton in the seasonal distribution of research studies. This will provide the basis for the assessment of ecosystem data.From May 2009 to January 2010, we have conducted a total of four sub-sampling, sampling points in the river, including where the H River, River Road, River, and Akamatsu, for a total of five sampling points in section 2 of the sample survey, and sampling points near the water bodies of the physical and chemical analysis.In this paper, floating plants and animals in all seasons of the type and density of a detailed investigation and careful analysis, these data can be reaction to the upper reaches of the Songhua River water pelagic fauna and flora of the basic features. The results showed that the types of zooplankton and phytoplankton in comparison with 1980 has increased very significantly, on the contrary, their density has decreased by an order of magnitude. The dominant species of phytoplankton shifted from Chlorophyta become Bacillariophyta; Potifera species number increased a lot; Cladocera and copepod species richness and density is relatively low. Temperature is the seasonal distribution of zooplankton and phytoplankton primary factors, light, water turbidity, the existence of harmful ions, nutrients content, also on the distribution of zooplankton and phytoplankton great influence. The species similarity between samples is low, the special environment in winter, which makes it possible to improve sampling of species similarity. River nutrient poor, lack of nutrient ion content, and lower levels of harmful ions. White Mountain Reservoir in April 2009 put in a lot of fish eggs, Affecting local animal species and density of zooplankton made. Spring flood period of poor water quality, water quality levels ranged between class II and III , other times, water quality stability in the level II . Songhua River is Gradeâ…¡water quality, need reasonable protection.