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[1]徐政,张贵刚,胡韧,等.贫营养型水库中罗非鱼对浮游植物的影响：围隔实验[J].应用与环境生物学报,2011,17(02):191-195.[doi:10.3724/SP.J.1145.2011.00191]
　XU Zheng,ZHANG Guigang,HU Ren,et al.Effect of Tilapia (Oreochromis nilotica) on Phytoplankton Assemblage in an Oligotrophic Reservoir: An Enclosure Experiment[J].Chinese Journal of Applied & Environmental Biology,2011,17(02):191-195.[doi:10.3724/SP.J.1145.2011.00191]
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贫营养型水库中罗非鱼对浮游植物的影响：围隔实验()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
17卷
期数:
2011年02期
页码:
191-195
栏目:
研究论文
出版日期:
2011-04-25

文章信息/Info

Title:
Effect of Tilapia (Oreochromis nilotica) on Phytoplankton Assemblage in an Oligotrophic Reservoir: An Enclosure Experiment
作者:
徐政;  张贵刚;  胡韧;  韩博平
（1暨南大学水生生物研究所 广州 510632）
（2热带亚热带水生态工程教育部工程研究中心 广州 510632）
Author(s):
XU Zheng;  ZHANG Guigang;  HU Ren;  HAN Boping
(1Institute of Hydrobiology, Jinan University, Guangzhou 510632,.China)
(2Engineering Research Center of Tropical and Subtropical Aquatic Ecological Engineering,Ministry of Education, Jinan University, Guangzhou 510632, China)
关键词:
浮游植物; 罗非鱼; 围隔; 贫营养型水库; 水质评价
Keywords:
phytoplankton;  tilapia;  enclosure;  oligotrophic reservoir;  water quality assessment
分类号:
Q178.513
DOI:
10.3724/SP.J.1145.2011.00191
文献标志码:
A
摘要:
于2009年9~11月在贫营养型的大型深水水库（流溪河水库）中进行了围隔（体积约为85 m3）实验，分析了罗非鱼对浮游植物的影响. 根据水库中现有鱼类的生物量，设置加鱼处理组（2 g /m3）和无鱼对照组两组. 每组有3个重复，实验开始后每周采样一次，测定水质与采集浮游生物定性和定量样品. 实验结果表明，加鱼处理组和对照组的总氮、可溶性无机氮没有明显差别，实验后期的总磷与正磷有一定差别，处理组略高于对照组. 加鱼处理组浮游植物丰度及生物量、叶绿素a的含量显著高于对照组（P<0.05），且透明度低于对照组，个体小于30 ?m的浮游植物种类的丰度与生物量较明显增加，浮游动物丰度显著低于对照组（P<0.05），但是生物量差异不显著（P>0.05）. 总的来说，在贫营养条件下，低生物量的罗非鱼对水库浮游植物群落结构仍有着明显的影响，罗非鱼排泄产生的上行效应大于摄食产生的下行效应. 图6 参26
Abstract:
To examine the effect of tilapia (Oreochromis nilotica) on phytoplankton assemblage in oligotrophic water, an enclosure experiment was performed in the Liuxihe Reservoir, Guangdong, China, a large and oligotrophic water body, lasting for six weeks from September 10 to November 14 of 2009. Six large enclosures were used, among which three were for fish treatment (2 g/m3) and three for control (no fish). Each enclosure had a water volume of 85 m3. Water samples were collected every week for plankton and nutrient analysis. The results showed that there was no significant difference in TN and IDN and the biomass of zooplankton between the fish treatment and the control, TP and PO4 were higher in those of fish treatment only in the last three weeks than in those of control. However, the abundance and biomass of phytoplankton and chlorophyll a concentration were significantly higher in those of fish treatment than in those of control (P<0.05). The presence of tilapia resulted in the change of species and size structure of phytoplankton assemblage, and small-sized species (less than 30 ?m) markedly increased and the abundance of zooplankton markedly decreased (P<0.05) at the end of the experiment. In conclusion, tilapia had a significant impact on the structure of phytoplankton assemblage, and the bottom-up effect on phytoplankton from nutrient excretion of tilapia was stronger than top-down effect from its grazing. Fig 6, Ref 26

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备注/Memo

备注/Memo:
国家自然科学基金项目（No. U0733007）和教育部博士点基金（No. 20094401120009）资助
更新日期/Last Update: 2011-04-25