滇池铜绿微囊藻温光特性研究-市政工程专业论文.docxVIP

重庆大学硕士学位 重庆大学硕士学位论文 中文摘要 II II 囊藻生长；在5月藻的增长率最大，为36.4%，表明水温18.5℃是铜绿微囊藻最适 温度。6~7月平均水温20.1℃，藻的增长率较小，加之6月的晴天数（2d）远少于 阴雨天数（28d），且7月的11个晴天日中有9天的温度处在高温段，不利藻生长， 这表明水华暴发期间常在4~5月，水温18.5℃时、晴天有光照，增长最快。 ② 研究结论 1）滇池优势藻种—铜绿微囊藻的生长受光照影响，其温度三基点：最低温度 为14℃，最适温度为18℃，最高温度为31℃。 2）实验测得的最适温度 18℃，最接近快速增长期的水温 18.5℃，表明 18℃ 接近滇池铜绿微囊藻的最适温度。 关键词：滇池，铜绿微囊藻，生长速率，光照，最适温度 重庆大学硕士学位 重庆大学硕士学位论文 英文摘要 III III ABSTRACT Nearly 20 years, owing to water pollution can not be well controlled, the eutrophication in Dianchi Lake have not been improved, cyanobacterial-blooms (Microcystis aeruginosa) occur frequently. After the formation of water-bloom, the death of lots of blue algae consume dissolved, and anaerobic condition of water body causes the death of heterotrophic microorganism. The decomposition process of organic debris produces hydrogen sulfide, amoxicillin and other harmful substances, resulting in the death of aquatic organisms, destruction of aquatic ecosystems, and endangering fisheries. The lower of water transparency and the emission of harmful gas due to water-bloom not only affect water landscape, but tourism. Meanwhile some cyanobacteria-Microcystis produce microcystin harm to human health through the food chain or by dringking. Therefore, the study on the activiy of M. aeruginosa in Dianchi Lake has a certain significance. Currently, the effection of temperature, illumination and nutrient on the cell proliferattion of M. aeruginosa has been reported, but research on activity rhythm and growth temperature in M. aeruginosa has some problems. In order to further understanding composition of the algae in Dianchi Lake, and activity routines of M. aeruginosa and the growth temperature, etc, the characteristic research on effects of temperature and light on the cell proliferation has been carried out, to accumulate research experience and data in the exploration of Microcyst activity rhythm and the prediction mechanism. The paper through the research data and temperature and light experiments of M. a