漓江鱼类物种多样性及其演变态势研究

根据漓江30多年来三次较大规模水生生物自然资源调查的鱼类信息数据，按照内陆水域渔业自然资源调查的方法，利用数学统计法和多样性指数法分析历史与现状数据，在物种多样性层面上分析研究漓江鱼类多样性的特点及鱼类三十多年来多样性的变化趋势，并在多样性的层面上分析漓江鱼类日益枯竭的原因，为漓江水生态系统保护与修复提供科学依据。研究显示，漓江鱼类的物种多样性指数处于较高水平，但由于各种有害致危因素的叠加影响，漓江水生态系统呈现出亚健康状态，水生生物结构严重失调，鱼类自然资源日趋衰竭的态势严重，鱼类物种多样性下降趋势显著，保护与修复工作刻不容缓。

Lijiang River fish species diversity and their evolution situation studies

According to the Lijiang River 30 for many years three time big scale aquatic organism natural resource investigation's fish message data, according to the inland water fishery natural resource investigation's method, the use mathematics method of average and the multiple exponential method analysis history and the present situation data, in the species multiple stratification planes the analytical study Lijiang River fish multiple characteristics and the fish more than 30 for year multiple change tendency, and has analyzed the reason which in the multiple stratification planes the Lijiang River fish dries up day by day, provides the scientific basis for the Lijiang River aquatic condition system protection and the repair. The research demonstrated that the Lijiang River fish's species multiple indices are in the high level, but because each kind sends the danger factor harmfully the superimposition influence, the Lijiang River aquatic condition system presents the Asian healthy condition, the aquatic organism structure is out of balance seriously, the fish natural resource failure's situation is day by day serious, the fish species multiplicity declining trend is remarkable, the protection and the recovering are urgent.