探讨景观特征等生态因素在种群微进化过程中的作用是景观遗传学研究的核心内容，也是进化生物学研究的热点之一。但这些研究很少关注水生植物，这一维持水生态系统运转的关键类群。在前期工作中，我们发现生境特征可能影响一些广布沉水植物的种内和种间基因流及遗传分化，但想要更全面地理解水生植物的环境适应与进化需要对更多代表性类群开展比较研究。本项目选取高寒地区（东北、西北和青藏高原）分布、生态型不同的三种水生植物，首先通过谱系地理学研究，揭示三种植物在不同地区间的遗传分化和种群动态。在此基础上，对分布在青藏高原这一特殊的气候和地理单元平台上的三种植物种群进行景观遗传学分析，探讨青藏高原水生植物遗传多样性和结构，以及历史和现时环境因素对水生植物遗传格局的影响。本研究的结果将帮助人们更好地理解水生植物种群进化历程和影响因素。

Examining the roles played by ecology and the environment in microevolutionary processes of species is a key research field in landscape genetics, as well as a research hotspot in evolutionary biology. But few studies have focused on aquatic plants, an important part of the structure and function of freshwater ecosystems. In preliminary work, we found that habitat quality may influence the intra- or inter-specific gene flow of some widespread submerged plants, but comparative studies involving more representative species are needed to deepen our knowledge of the ecological adaptation and evolution of these special ecological taxa. In this study, we used phylogeographic analysis in three species of boreal and arctic-alpine aquatic plants with different ecotypes, to reveal their demographic history and genetic structure among regions (the Qinghai-Tibetan Plateau, Northwest China and Northeast China). We subsequently used landscape genetics analysis in the populations from the Qinghai-Tibetan Plateau, to study genetic diversity, population structure, and the historical and contemporary influences of ecological factors on the genetic divergence in aquatic plants. The results will help us completely understand the evolutionary processes of aquatic plants and their underlying causes.