摘要
鲤是我国浅水湖泊常见鱼类,鲤可以通过扰动底泥、牧食浮游动物、排泄营养盐等途径影响湖泊水质。为了研究鲤对浅水湖泊水质的影响,论文于2009年6月23日至8月18日在暨南大学明湖进行原位围隔实验。实验分为三个处理组(三组围隔):(1)在围隔中放养鲤(放鱼组);(2)在围隔底部放置塑料隔网,在隔网上部空间放养鲤(放鱼放网组);(3)围隔中不放隔网也不放鲤(空白对照组)。实验结果表明:鲤可以显著增加水体悬浮物、总氮、总磷和叶绿素a含量,显著降低了水体透明度。而鲤是否扰动底泥对水体悬浮物、总氮、总磷和叶绿素a含量等指标的影响不显著。因此,该研究中鲤对浅水湖泊的影响可能主要是通过排泄等途径实现的,鲤扰动底泥对水质的影响不大。
Common carp （Cyprinus carpio）, widely distributed in shallow lakes, can affect water quality by disturbing sediment and excreting nutrients. In order to study the impact of common carp on water quality of shallow lakes, an enclosure experiment was carried out in Ming Lake of Jinan University from June 23 to August 18, 2009. There were three treatments： enclosures with fish （EF）, enclosures with fish with plastic nets above sediments （EFN） and enclosures without fish as controls （EFL）. Results showed that common carp significantly increased suspended solids, total nitrogen, total phosphorus and chlorophyll a concentrations, but reduced transparency. However, the difference in suspended solids, total nitrogen, total phosphorus and chlorophyll a between EF and EFN was not significant. Present study indicates that there are no significant effects of sediment disturbance on water quality, and the effects of common carps on water quality are likely due to nutrient excretion.
出处
《生态科学》
CSCD
北大核心
2013年第2期171-176,共6页
Ecological Science
基金
国家重大科学研究计划项目(2012CB956104)
关键词
鲤
围隔实验
浅水湖泊
底泥扰动
carp
enclosure experiment
shallow lakes
sediment disturbance
