TOXICITY OF COPPER TO THE GREEN-ALGA, CHLAMYDOMONAS-REINHARDTII (CHLOROPHYCEAE), AS AFFECTED BY HUMIC SUBSTANCES OF TERRESTRIAL AND FRESH-WATER ORIGIN

被引：38

作者：

GARVEY, JE ^{[1
]}

OWEN, HA ^{[1
]}

WINNER, RW ^{[1
]}

机构：

[1] MIAMI UNIV,DEPT ZOOL,OXFORD,OH 45056

来源：

AQUATIC TOXICOLOGY | 1991年 / 19卷 / 02期

关键词：

COPPER TOXICITY; HUMIC ACID; FULVIC ACID; DEFLAGELLATION; CHLAMYDOMONAS-REINHARDTII;

D O I：

10.1016/0166-445X(91)90029-9

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

Population growth, loss of flagella and encystment were used as indices of copper toxicity to Chlamydomonas reinhardtii. Copper concentrations up to 64-mu-g/l had no effect on population growth in any of the treatments. Deflagellation occurred at copper concentrations ranging from 6.7 to 25.4-mu-g/l with terrestrial humic acid (HA) having the greatest effect on toxicity and aqueous fulvic acid (FA) having no effect on toxicity. The effect of aqueous HA was intermediate. Encystment was a less sensitive index of copper toxicity than was deflagellation but it may offer protection against extinction when algae are exposed to pulses of higher copper concentrations. Based on our results, we conclude that terrestrially derived humic acids are an inappropriate model to be used in predicting the effects of freshwater humic substances on the toxicity of metals.

引用

页码：89 / 96

页数：8

共 12 条

[1] AN ANALYSIS OF SELECTIVE HERBIVORY IN AN ACID LAKE AND ITS IMPORTANCE IN CONTROLLING PHYTOPLANKTON COMMUNITY STRUCTURE [J].