多因素驱动下元江鱼类功能多样性的变化过程和保护研究

元江-红河是我国西南纵向岭谷区重要的国际河流，鱼类区系组成独特，资源丰富，受纵向岭谷和喀斯特高原特殊地貌、以及日益加剧的气候变化和人为干扰的复合影响，成为濒危物种和生物多样性保护优先考虑的热点地区。本研究在历史资料基础上结合现场系统性野外调查，完善鱼类功能性状数据库，应用功能alpha与beta多样性指数刻画元江流域鱼类功能多样性的空间格局及演变过程；运用数量生态学方法和模型，量化气候变化、水文情势和遥感数据表征的人为干扰，对鱼类功能性状的作用，筛选出响应环境变化的敏感物种；从环境-功能性状关系及种间关系角度，探究并预测元江流域鱼类群落内部结构和功能多样性变化，为确定元江流域鱼类功能脆弱区域、有针对性地开展关键物种保育与生态系统功能维护的工作提供参考。

As an international river locates in the longitudinal range-gorge region (LRGR) in southwest China, Yuanjiang (Red river) has become a priority hotspot for endangered fish species and biodiversity conservation, because of its unique fish fauna. Meanwhile, it is suffering from more and more severe climate change and human-caused disturbance, besides the combined influence of the special landform of the LRGR and the karst plateau. Understanding the response of fish functional diversity to the environment change and disturbance, provides important basics for conservation of key fish species and the maintenance of freshwater ecosystem function. .This study is aimed to carry out a research on the change of fish functional diversity driven by multiple factors in the catchment. We intend to describe the functional diversity pattern of fish by alpha, beta (and it’s components) indices, with a fish database including historical data, field survey data, and fish functional traits data. Quantitative ecological methods and models will be used to quantify the dominant environmental factors and their roles in shape the change pattern of diversity, based on the data of climate change, anthropic factors hydrological stations records, and abiotic environment factors. From the perspective of environment-trait relationship and interspecies relationship, this research tend to predict changes of the fish functional diversity, so as to identify the vulnerable areas and keystone fish species in the study area, which could effectively guide the ecological functional conservation work for Yuanjiang River basin.