河流保护区河岸带自然恢复过程中生境空间异质性形成机理研究

项目名称： 河流保护区河岸带自然恢复过程中生境空间异质性形成机理研究

项目编号： No.41201187

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 地理学

项目作者： 孔维静

作者单位： 中国环境科学研究院

项目金额： 26万元

中文摘要： 利用高分辨率航片和QuickBird影像解译获取的辽河保护区景观类型图，研究河流保护区自然恢复过程前后河岸带生境斑块演化及自然恢复过程中生境空间异质性形成机理。在景观类型图解译过程中，将植被斑块划分到群落类型水平。利用空间分析结合生境斑块组成和空间配置指数研究不同类型生境斑块在自然恢复后的演化。通过野外调查结合空间插值技术获取环境因子参数，计算生境斑块与环境因子的距离，利用排序分析和方差分割方法结合研究环境因素与河岸带生境斑块空间配置的关系，分析环境因子对斑块性的影响及不同因子的贡献率。通过分析距河道距离增加过程中河岸带生境斑块组成、空间配置和斑块NDVI的变化，阐明河岸带斑块性变化的空间梯度特征。通过不同水文年间洪水的变化和生境斑块性参数变化的结合，分析水文年际节律对河岸带生境斑块性的影响。通过本课题研究，为我国河流保护区建设、河流水量调配和保护区评价提供理论和技术支持。

中文关键词： 河流保护区；植被演替；河岸带；遥感影像；景观格局

英文摘要： Based on landscape type maps interpreted from high resolution aerial images and QuickBird images, riparian habitat patches evolution and the heterogeneity formation mechanism before and after natural rehabilitation was researched in a river protected area. Vegetation patches was interpreted into vegetation community type level. Combined overlay analysis with patch structure and spatial configuration indexes habitat patches evolution was studied. Environmental variables were got through field surveys and spatial interpolation, and ordination analysis and variation partitioning method was used to analyze the influence of environmental variables on patch spatial configuration and its contribution. Gradient features were studied through the change of patches composition, spatial configuration and NDVI along the distance gradient from the river channel margin. Riparian patches heterogeneity during different hydrological years was studied through combination of flood and patches heterogeneity indices. This research can provide theoretical and technical base for river protection area establishment, riverine water allocation and river protected area landscape assessment.

英文关键词： riverine reserve ；vegetation succession；riparian zones；remote sensing images；landscape pattern