三峡库区青干河峡谷鸳鸯越冬生境选择初探

从影响动物生境选择的水、食物、隐蔽物和干扰等因子对2010年11～12月在青干河首次发现的62只越冬鸳鸯新的越冬地环境进行了初步分析。结果表明:随着三峡水库蓄水至175m,长江支流青干河尾水段面积扩展及其他适宜水环境条件为越冬鸳鸯提供了良好生境;青干河及两岸分布的陆生植物及水生动植物为鸳鸯越冬提供了一定食物来源;两岸茂密的植被为鸳鸯陆上及水面的栖息提供了良好的隐蔽条件;人为干扰的负面影响较小成为鸳鸯越冬生境选择的重要因素。

Initial Exploration of Overwintering Mandarin Duck Habitat Selection along the Valley of Qinggan River of Three Gorges Area

This essay for the first time analyzes new overwintering habitat environment of 62 mandarin ducks Aix galericulata found along Qinggan river,which is the tributary of Changjiang river in Three Gorges area,based on the factors that influence animal habitat choosing include water accessibility,food resource,shelter and disturbance.This research shows that,when the water level raised to 175 meters,the enlarged area of tail water and other proper water factors provided accommodating environment for mandarin ducks’ overwintering activities.The abundant terrestrial plant as well as aquatic plant and animal resources along Qinggan river offered mandarin ducks certain food sources.The thick vegetation provided well hidden conditions both on land and water surface.The influence of human activity disturbance was limited.