赤水河与金沙江下游河段鱼类生境条件的相似性分析  

Similarity analysis of fish habitats between the Chishui River and downstream reaches of the Jinsha River

作　　者：林俊强[1] 彭期冬[1] 任杰[1] 柏海霞[1] 赵利[1] 

机构地区：[1]中国水利水电科学研究院,北京100038

出　　处：《淡水渔业》2014年第6期93-99,共7页Freshwater Fisheries

基　　金：国家"十二五"科技支撑项目课题(2012BAC06B01);中国长江三峡集团公司经费项目(0799533);国家自然科学基金面上项目(51379218)

摘　　要：为探讨长江上游特有鱼类在赤水河栖息繁殖的可能性,评估赤水河作为金沙江下游干流替代生境的可行性与适宜性,将河流生境进行适当概化,建立赤水河与金沙江下游河段的生境相似性指标体系,应用模糊相似理论,提出基于恒定型相似元、时间型相似元和系统相似度的河流生境相似性计算方法。以赤水河与金沙江下游河段为研究对象,实例计算了两个河流生境的相似程度,结果表明赤水河与金沙江下游河段在水环境方面的相似度高达0.811,处于高度相似等级,河流地形地貌与水文方面的相似度分别为0.743和0.640,均处于基本相似等级。总体来说,赤水河与金沙江下游河段的河流生境相似程度较高,相似度达0.694,处于基本相似等级。In order to assess the feasibility and suitability of Chishui River to be an alternative fish habitat of downstream reaches of Jinsha River,a similarity analysis was performed between these two rivers. Based on the generalized hierarchical structure of river habitat,a similarity indicator system was established. A set of calculation methods of habitat similarity,including different types of similarity elements and system similarity degree,were presented. The calculated results of similarity degree showed that the water environment between these two rivers was in highly similar level（ value of similarity elements in water environment reached 0. 811）. The river morphology and hydrology were both in basically similar level（ values of similarity elements in river morphology and hydrology were 0. 743 and 0. 640,respectively）. On the whole,the habitat similarity between Chishui river and downstream reaches of Jinsha river was relatively high（ value of similarity degree was 0. 694） and in basically similar level.

关 键 词：赤水河 金沙江下游河段 鱼类生境 相似性分析 

分 类 号：S931.3[农业科学—渔业资源]