浙江省峡谷型水库蓝藻水华发生的主要环境因子与生态分析
首发时间:2009-04-02
摘要:本文调查了以湖南镇水库为例的浙江省峡谷型饮用水水库的蓝藻水华发生的水化学特点。水温与总氮、总磷呈极显著的正相关(p<0.01),叶绿素a与总氮、溶氧呈极显著相关(p<0.01),与透明度正负相关(p<0.05)。总氮与总磷之间的波动也呈极显著相关(p<0.01)。因此,湖南镇藻类是水体中能够对营养盐产生响应的唯一生产者,外源营养盐的输入使藻类大量繁殖,藻类的生长又失去了上层食物链的下行控制效应,加上其具备的竞争优势,蓝藻水华的大爆发也就成了必然。通过初步探索,对湖南镇水库鱼产力255.6公斤/公顷的估算与千岛湖推算出所需鲢鳙生物量为240公斤/公顷的结果非常接近,通过放养鲢鳙来达到消除蓝藻水华、保护水环境的目的则是完全可行的。
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The major environment factors and ecological analysis of Cyanobacteria bloom of Canyon Reservoir in Zhejiang province
Abstract:In the present study,the blue—green algae bloom water-Hunanzhen Reservoir of Canyon Reservoir in Zhejiang Province,was monitored. Hydrochemistry Characteristic was measured.WT and TP, TD was highly significant positive correlation(p<0.01).Chl a and TD,DO was highly significant correlation(p<0.01),while Chl a and SD was positive correlation negative correlation(p<0.05). TD and TP values showed a significant correlation. As a result, algae in Hunanzhen Reservoir was the only one producer that was able to response to the nutrients. Own to extraneous nitrogen sources, the lose of the food chain’s top-down effects and competitive advantage of the algae, the explode of cyanobacteria bloom was inevitable. According preliminary research, the estimation of 255.6Kg/Ha of the fish productivity in Hunanzhen Reservoir was very chose to the projection of 240 Kg/Ha of the silver carp and bighead carp needed in Qiandaohu. Of course with the purpose of protecting water environment ,stocking silver carp and bighead carp to eliminate cyanobacteria bloom was feasible. Keywords: Cyanobacteria bloom, Hydrochemistry, Ecological analysis
Keywords: Cyanobacteria bloom Hydrochemistry Ecological analysis
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