罗非鱼对浅水型湖泊生态系统营养水平的影响:《江苏环境科技》2008年S1期

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罗非鱼对浅水型湖泊生态系统营养水平的影响

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Z)`w)D/\)lF _-as H0【摘要】:惠州南湖(惠州西湖子湖之一)是典型的亚热带浅水城市湖泊。2007年5月惠州西湖开展了以水生植被构建和鱼类调控为主的生态系统修复与构建(中试)工程,以控制湖泊富营养化,改善湖泊水质。在工程前对罗非鱼等野杂鱼类进行了清理。清鱼后总磷下降了58.79%,总氮上升了36.48%,浊度下降77.87%,水体透明度明显改善。浮游植物的种群结构变化不大,但生物量变化很大,水体的富营养化程度有所改善,罗非鱼等野杂鱼能够明显加剧水体富营养化进程。水利论文!q"Iv G6Z@a(Z(q

/p I y0{A%w5X0【作者单位】:水利论文T/\qGV,kT4d

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南京市水产科学研究所 南京中科水治理工程有限公司 南京中科水治理工程有限公司水利论文*v.x@;iW Tw pQRy

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罗非鱼 浊度 总磷 总氮水利论文7eJ(u$x^V\"k tH

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K0h.z6B4t]'ex0惠州西湖面积为1.34hm2,是广东省的永久性淡水湖泊之一,由平湖、丰湖、南湖、菱湖、鳄湖大小不等的五个子湖组成,南湖中试区是南湖的一部分,工程区水面约12万m2,水深1.6m至2.2m之间。1995年至2003年之间,惠州市政府采用截污、清淤、引清三管齐下的措施进行分湖整治。目前已无水利论文yq'Cs%x$e"^K:Kc

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