生态与农村环境学报2017，Vol.33Issue(1)：77-83,7.DOI:10.11934/j.issn.1673-4831.2017.01.011
不同重金属混合液对萼花臂尾轮虫(Brachionus calyciflorus)实验种群增长的影响
Effects of Mixture of Different Heavy Metal Ions on Population of Freshwater Rotifer Brachionus calyciflorus
摘要
Abstract
To explore effects of combined heavy metal pollution on aquatic organisms,an experiment was carried out using fresh water rotifers,Brachionus calyciflorus,which are among the most important groups of zooplankton in terms of biomass,ecological importance and bio-diversity,and are recognized as ideal bioassay animals for toxicity tests because of their small size,short generation time and rapid reproduction rate.However,few reports are available in the literature on impacts of combined heavy metal pollution on rotifers.This experiment was designed to use solutions of heavy metal mixture,containing Cu2+(0.001 and 0.01 mg · L-1),Zn2+(0.01 and 0.1 mg · L-1),Cd2+(0.01 and 0.1 mg · L-1),Cr6+ (0.01 and 0.1 mg · L-1),Mn2+(0.1 and 1 mg · L-1) and 18 d old freshwater rotifers in the cumulative culture test.Population growth rate and maximal population density of the rotifers were monitored.Results show that concentrations of the metals in the solution was the major factor affecting toxicity of the solution to the rotifers.Population growth rate and maximal population density of the rotifers were significantly lowered by solutions high in heavy metal concentration.Interactions of any given element with the other 4 in concentration in the solution all significantly influenced population growth rate of the rotifers,while interactions of Zn2+ with the other 4 in concentration in the solution significantly influenced maximal population density of the rotifers.The rotifers were more sensitive to interactions between the elements in the solution in population growth rate than in maximal population density.So they can be used as bio-indicator to monitor combined heavy metals pollution of water bodies.关键词
重金属混合液/萼花臂尾轮虫/种群增长率/最大种群密度Key words
solution of heavy metal mixture/Brachionus calyciflorus/population growth rate/maximal population density分类
资源环境引用本文复制引用
徐晓平,席贻龙,黄林..不同重金属混合液对萼花臂尾轮虫(Brachionus calyciflorus)实验种群增长的影响[J].生态与农村环境学报,2017,33(1):77-83,7.基金项目
国家自然科学基金(31470015) （31470015）
安徽省高等学校自然科学研究重点项目(KJ2016A063) （KJ2016A063）
安徽工程大学青年科研基金(2015YQ01) （2015YQ01）
