我国南黄海沿岸湿地底栖纤毛虫原生动物：物种、基因、生态系多样性

底栖纤毛虫因食性多样而在近海湿地微食物网中扮演着重要的生态学功能并成为研究底栖生境中原生动物与细菌、微藻等微型生物间关系的重要类群。近年来我国长江口以南湿地底栖纤毛虫的研究已有众多进展，但围绕北方水系该类群的工作高度缺乏。本工作拟以南黄海滩涂、河口、盐沼等典型湿地为调查地，运用分类学、发生学及基因测序等手段开展底栖类群生物多样性、分子系统学、生态分布及变化等方面的研究，旨在 1）建立我国南黄海海区底栖纤毛虫物种多样性和代表属种发生模式的第一手资讯；2）构建研究欠缺类群的DNA资源库，填补国内该生境研究的空白;3）在基因库构建的基础上，探讨关键类群的系统演化地位；4）揭示不同沉积生态系的群落结构、分布与时空演化特征、探寻驱动群落结构变化的主要因素和内在关联。本工作的开展将为我国微型生物资源的开发利用、底栖生态学等领域研究以及回答真核微生物的地理分布格局问题提供重要的（相关类群的）基础资料。

Benthic ciliates play an important ecological role in the microfood web of offshore wetlands due to their diverse feeding habits and become an important group for studying the relationship between protozoa and microorganisms such as bacteria and microalgae in benthic habitats. In recent years, many advances have been made in the study of benthic ciliates in the tropical coastal areas of southern China and wetlands south of the Yangtze Estuary, but there is a high lack of work on this group in the northern river system. The purpose of this work is to study the species and ontogenesis diversity, molecular systematics, ecology and geographical distribution of benthic ciliates in typical wetlands such as beaches, estuaries and salt marshes in the southern Yellow Sea by means of ecology, classical taxonomy and molecular technology. This work aims to establish first-hand information on the species diversity of benthic ciliates and ontogenesis of key taxa; 2) to construct the background database of species and gene diversity to fill the gaps in such study field in China; 3) to explore the phylogenetic status of key groups on the basis of the construction of gene bank; 4) to reveal the community structure, distribution and temporal and spatial evolution characteristics, and to explore the main environmental factors and internal relationships that drive the change of community structure. The proposed work will provide important basic data for the assessment of coastal water environment, the development and utilization of micro-biological resources, benthic ecology and other basic fields in China.