秋季太湖鱼类群聚特征和生境特征的关系
毕业论文关键词：太湖、鱼类、群落结构特征、生境、水环境因子
A Study on The Hydroponic Experiment of Different Chinese Herbal Medicine and the Effect of Water Purification
Abstract:Taihu Lake is the most typical large shallow lake in the Yangtze River Basin,mild climate, rich in fishery resources. In order to investigate the community structure characteristics of Taihu Lake fish and its relationship with habitat, in this study,the fish and the environmental factors were investigated at 30 sites, 8 area in Taihu Lake from October to November in 2016.In this study，a total of 4270 inpiduals were collected and identified as 33 species representing 7 families and 27 genera。Among them，Coilia macrognathos Bleeker, Chinese white prawn, Macrobrachium nipponense and Rhinogobius giurinus as the main dominant species. Sorensen similarity analysis showed that the fish composition of the eight lake areas was similar. Pearson correlation analysis showed that the main reason for influencing the inpidual number of fish are pH and dissolved oxygen. I hoped that this study can provide the evidence for the fish protection and management and the restoration of water resources in the Taihu Lake Basin.
Key words:Taihu Lake；Fish；Community structure characteristics；Habitat；Water environment factor
目 录
摘要1
关键词1
Abstract1
Key words1
引言1
第二章、秋季太湖鱼类群落结构特征和水环境因子 2
1.材料与方法2
1.1实验对象及材料 2
1.2样点设置2
1.3实验方法3
1.4研究方法3
1.4.1优势度（Y）及计算3
1.4.2种类丰富度指数（D）、均匀度指数（J）4
1.4.3多样性指数4
1.4.4 群落相似性系数4
1.4.5 相关分析4
2.结果与分析4
2.1太湖鱼类群落结构特征4
2.1.1鱼类物种组成4
2.1.2太湖鱼类优势种10
2.1.3 生物多样性指数 10
2.1.4不同网具渔获物种类组成及多样性分析10
2.1.5群落相似性系数分析13
2.2太湖水环境特征14
2.2.1秋季太湖环境因子与营养状态评价14
2.3太湖鱼类群落结构特征与水环境因子的相关性分析15
3.讨论15
3.1太湖富营养化 15
3.2太湖鱼类群落结构特征与水环境的关系 16
3.3展望16
致谢16
参考文献16
秋季太湖鱼类群聚特征和生境特征的关系
引言
太湖是长江流域最典型的大型浅水湖泊。太湖流域气候温和，水网稠密，渔业资源丰富[1]。20世纪八十年代后期，流域经济快速发展，湖泊水体环境质量不断下降，太湖的营养化程度加重。从湖内氮、磷的营养成分分析，其指标均在中一富营养和富营养化水平，中一富营养和富营养化的面积已占太湖总面积的90%以上，蓝藻水华频发[2]。由于过度捕捞、水生植被退化及历史上形成的江湖阻隔等多重影响[3]，太湖优势鱼类如翘嘴鲌（Culter alburnus）和鳜（Siniperca chuatsi）等渔获量不断减少，鱼类群落结构和多样性特征发生显著变化[4],影响了太湖渔业的健康发展。
上一篇：罗非鱼生物经济学模型研究