针对“构建生态廊道和生物多样性保护网络”的国家重大生态需求，结合当前生态廊道构建方法应用于湿地生态系统过程中忽略水文格局的问题，本研究提出基于水文连通性构建湿地生物多样性保护廊道的思路。本研究在已完成的湿地生物多样性热点基础上，通过水文连通性量化重点分析生物多样性热点内部的水文连通性变化规律及其与外部水文连通性的关系，以此划分廊道功能、维度与等级，形成湿地生物多样性廊道体系框架；通过洪泛频率梯度识别当前三江平原水文连通空缺，并根据土地利用-水文连通-生物多样性热点之间的互动关系分析水文连通空缺对生物多样性热点的影响及趋势；根据热点变化年份和历史洪泛范围确定廊道位置与宽度，结合水文连通阻力与最小累积阻力模型确定廊道功能区划；综合热点内部水文连通性变化驱动因素及廊道体系框架下的廊道功能、维度、等级，提出详细的管控策略。期望本研究能够完善现有生物多样性网络构建方法，为生态廊道实践提供技术支撑。

In view of the major national ecological security needs of "building ecological corridors and biodiversity protection networks", and the problems existing in the application of the current corridor identification methods to wetland ecosystem, this study proposes the idea of constructing corridor system for wetland biodiversity based on hydrological connectivity. Firstly, on the basis of the completed hot spots of wetland biodiversity and quantified hydrological connectivity, the changing rules and of hydrological connectivity within the biodiversity hotspots and its relation to external hydrological connectivity will be analyzed in order to determine the functions, dimensions and grades of corridors and form the framework of wetland corridor system. Secondly, the external hydrological connectivity of biodiversity hotspots will be quantified to identify the hydrological-connectivity gaps in Sanjiang Plain based on flood frequency gradient, and then the impacts and trends of the gaps will be analyzed according to the interaction between land use, hydrological connectivity and biodiversity hotspots. Thirdly, the location and width of the corridors will be determined based on the flood area at the year that a certain hotspot’s hydrological connectivity decreased, and the zoning of the corridors will be determined by combining the concept of hydrological connectivity resistance and the minimum cumulative resistance model. Finally, based on the analysis of driving factors for the change of hydrological connectivity inside the hotspots and the corridor function, dimension and grade under the framework of corridor system, detailed management and control strategies will be put forward. We hope that this study will improve the existing methods of biodiversity network construction and provide technical support for ecological corridor practice.