城镇化导致的生物多样性的丧失日益受到关注，青藏高原的城镇化过程中对水资源的需求急剧增加，使溪流水生昆虫多样性的丧失风险更加严峻。本项目拟以青藏高原水生昆虫类群为研究对象，通过对无干扰或干扰极小溪流的调查，分析湟水河上游溪流流域内水生昆虫多样性（多样性指数、物种数、特有种、稀有种）现状及特点，以及沿自然环境梯度的分布规律，在此基础上，多元统计分析无干扰溪流/城镇化强度/城镇化干扰溪流内物理生境、水质、流速与溪流水生昆虫种群发生规律和群落结构（优势种、敏感种、丰富度）的关系，寻找高原城镇化导致的水生昆虫多样性下降的关键环境因子，揭示城镇化对溪流水生昆虫多样性的影响机制。研究结果有望为青藏高原地区水生生物多样性的保护和城镇化的科学规划提供科学依据。

The loss of biodiversity caused by urbanization is being increasingly concerned, and the requirment of water resource is highly raising in the process of urbanization of Qinghai-Tibet plateau, so the loss risk of diversities of aquatic insects will become more serious. This project aims to aquatic insects on the Qinghai-Tibet plateau to study the diversities of insect species in the streams originated from Huangshui River, The present situation and features will be analyzed so that the law of natural distribution of insects is revealed under the conditions of different water quality and phy sical &chemical habitats, which includes the index of diversity, number of specied, local or special species and rare species. On the basis of that, the relations betwen the population dynamics of aquatic insects and the instensity of urbanization will be discussed through multivariate statistical analysis. The project will indicate the key factors which lead to decrease the diversity of insects and try to discover the mochanism of effects on the diversity. The results are expected to provide the scientific bases for the conservation of aquatic biodiversity in Qinghai-Tiber plateau and its urban planning.