ACUTE EFFECTS OF EXPOSURE TO SODIUM FLUORIDE ON THE RED COMPOST EARTHWORM EISENIA FETIDA: LETHALITY AND AVOIDANCE BEHAVIOR

作者：Dunne Kelsey; Verrell Paul^*

来源：Fluoride, 2011, 44(4): 210-214.

• Acute toxicity
• Avoidance behavior
• Earthworms
• Eisenia fetida
• Red compost earthworm
• Sodium fluoride and earthworms

This study tested for effects of acute exposure of the red compost earthworm Eisenia fetida to a range of concentrations of sodium fluoride (NaF) that bracket the fluoride concentrations applied to many municipal water supplies in the United States of America and other countries. No significant difference was found between worm survivorship after 96 hr of exposure to soil moistened with water only vs. with 0.5, 1.4, and 3.0 ppm NaF in water. In addition, no dose-response relationship was apparent across concentrations varying from 0.1 to 4.0 ppm NaF. Also, no significant avoidance of contaminated soil/preference for 'clean' soil was found when worms were exposed to soil moistened with 0.5, 1.4, and 3.0 ppm NaF in water. These results tentatively suggest that this species of earthworm may be tolerant to the fluoride levels that could be present in graywater (used for irrigation) and sewage sludge (used as fertilizer).

• 出版日期2011-12