Unit 3: Pesticide Pollution - Effects
- Created by: rosieevie
- Created on: 06-04-15 23:23
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- Effects of Pesticide Pollution
- Direct Effects
- Kill non-target species due to toxicity
- Cause infertility to non-target species and reduce breeding rates so the population cannot be maintained
- Indirect Effects
- May reduce food availability (starvation)
- May increase predator numbers (over predation)
- Organochlorine Insecticides e.g. DDT
- Very persistent (liposilble) so bioaccumulates/magnifies
- Causes infertility in birds - egg shells weak so break
- Organophosphate Insecticides e.g. parathion
- Not very persistent
- High mammal toxicity
- Sheep farmers exposed suffered nervous system damage
- Pyrethroids e.g. pyethrum
- Not very persistent or toxic - fewer problems
- High fish and non-target insect toxicity e.g. butterfly/bees
- Direct Effects
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