泼洒石灰水对鱼蚌混养水体中浮游生物群落结构的影响

研究了泼洒石灰水后鱼蚌混养水体系统中浮游生物的演化规律.实验设计了三组Ca2浓度水平(6、18、45 mg/L),时间为2个月.结果发现:施加不同浓度石灰水后,池蝶蚌(Hyriopsis schlegeli养殖系统水体中浮游生物的数量、生物量和优势种群随时间出现变化.浮游植物总数的变化和Shannon-Wiener多样...

Effect of quicklime water-spraying on plankton population in the Hvriopsis schlegeli culture ecosystem

The influence on the plankton′s growth and amount in Hyriopsis schlegeli culture ecosystem after quicklime water-spraying was studied.Three different levels of (6 mg/L、18 mg/L、45 mg/L) were included in a two-month experiment.The result showed that after quicklime water-spraying,the growth 、amount and biomass of plankton changed to some extent.The variety of phytoplankton amounts and Shannon-Wiener indexes at three different levels had no significant differences during the experiment,while,the content of chl-a and amounts of zooplankton in water samples at 0d and 7 d were significantly different at different levels.The phytoplankton′s superiority population changed more obvious compared with that of zooplankton.The content of chl-a and total phosphorus were significantly correlated,the amount variance of phytoplankton was also correlated with total phosphorus and ammonia nitrogen,so was zooplankton with total phosphorus and total nitrogen.According to the values of Shannon-Wiener diversity indices and physicochemical indexes,The culturing water were in a state of eutrophication.