摘要
本文通过对漓江水流域鱼类生态类型和鱼类生物多样性的变化进行调查,监测河流生态系统的情况。结果是,漓江鱼类物种多样性指数较高,但单种属较多;敏感性鱼类种类大幅度减少,中下层鱼类和底栖鱼类明显减少,杂食性鱼类比例上升;单位捕捞努力量渔获量减少,经济鱼类小型化,低龄化。水域生态环境存在较大的压力。
The ecological environment of the river is monitored through investigation ot the ecological types and biodiversity of fish in Lijiang river. The results show that the biodiversity of fish in Lijiang river was higher,but with more genu of single species,sensitive species reduced greatly,the submucosa and benthic fish reduced significantly,the proportion of omnivorous fish increased,CPUE reduced,economic fish was of miniatunization and younger age. The ecological envirment of water is under great pressure.
出处
《广西师范大学学报（自然科学版）》
CAS
北大核心
2012年第4期146-151,共6页
Journal of Guangxi Normal University:Natural Science Edition
基金
国家自然科学基金资助项目(40971280
30870345)
中央分成水资源费资助项目(2010-2011)
关键词
漓江
鱼类生态类型
生物多样性
Lijang river
ecological types of fish
biodiversity of fish
