Fish farmingSpec 9.9
Human interactions with ecosystems can have both positive and negative impacts on biodiversity, which is the variety of living organisms in an ecosystem. Fish farming is one example.
| Positive | Negative |
|---|---|
| Provides a reliable supply of food for a growing population | Waste and uneaten food pollute water and can cause eutrophication |
| Reduces overfishing, which protects wild fish stocks and biodiversity | Disease and parasites can spread from farmed fish to wild fish |
| Conditions can be controlled, so fish grow quickly | Escaped farmed fish may compete or interbreed with wild fish, reducing their genetic variety |
| Fish may be fed on wild fish, and chemicals used to control disease can harm other organisms |