洪湖养殖区水生植物种子库现状及水生植被恢复策略研究  

Seed bank in aquaculture area of Honghu lake and the strategy of aquatic vegetation restoration

作　　者：丁小青[1] 贾延亭[1] 杨娇艳[1] 安彦杰[1] 杨劭[1] 

机构地区：[1]华中师范大学生命科学学院城市水环境生态学湖北省重点实验室,武汉430079

出　　处：《华中师范大学学报（自然科学版）》2010年第2期296-300,共5页Journal of Central China Normal University：Natural Sciences

基　　金：湖北省重大科技攻关计划项目(2006AA305A04);湖北省自然科学基金重点项目(2008CDA101);华中师范大学中央高校科研基本业务费(CCNU0901016)

摘　　要：洪湖大面积围网养殖对水生植被破坏严重,为探讨洪湖养殖区水生植被恢复策略,在一个典型的养殖区域内进行了水生植被常规调查、水质调查、种子库调查、自然恢复试验.研究结果表明:(1)鱼类密度过大是水生植被退化主要原因和水生植被恢复的主要限制因子,而水质不是关键的限制因子.(2)养殖区种子库水生植物14种,平均密度为467±345 ind/m2.(3)养殖区现场2种自然恢复试验分别有5种、14种水生植物得到恢复.研究结果表明在洪湖养殖区现有水质条件下,仅通过严格控制草食性鱼类的密度,水生植被即可自然恢复.The large-scale and long-term aquaculture in Honghu lake has caused degradation of aquatic vegetation. In order to explore the strategy of aquatic vegetation restoration, we carried out a survey of aquatic vegetation, seed bank, and monitoring of water quality of a typical aquacultural area. The experiments of spontaneous restoration of aquatic vegetation in two enclosures were also conducted. The results of the study showed that （1） Excessive aquaculture was the main cause of vegetation degradation and the main limiting factor for vegetation restoration. （2） 14 species of macrophytes were found in the seed bank of the aquacultural area, and the total density of propagules was 471 ±345 ind/m^2. （3） 14 and 5 species of macrophytes were observed respectively in the two enclosures of spontaneous restoration experiments. The results indicated that to restore aquatic vegetation under current condition of water quality, the strategy is just to reduce the density of herbivorous fish.

关 键 词：洪湖 湿地 水生植被 自然恢复 

分 类 号：X37[环境科学与工程—环境工程] P941.78[天文地球—自然地理学]