* Competition for resources: Non-native species can compete with native species for food, water, and habitat. This can lead to the decline or even extinction of native species.
* Predation: Non-native predators can prey on native species, leading to their decline or extinction.
* Disease: Non-native species can carry diseases that can infect native species, leading to their decline or extinction.
* Hybridization: Non-native species can interbreed with native species, leading to the loss of genetic diversity and the emergence of new, less-adapted species.
Indirect impacts from eradication efforts
* Habitat destruction: Eradication efforts can sometimes lead to the destruction of native habitats. This can harm native species that rely on these habitats for survival.
* Poisoning: Eradication efforts often involve the use of pesticides and other chemicals that can harm native species. These chemicals can poison native species directly, or they can contaminate their food and water sources.
* Bycatch: Eradication efforts can sometimes lead to the unintended capture and killing of non-target species. This can harm native species that are not the intended target of the eradication effort.
Conclusion
Non-native species can have a significant impact on the environment, both directly and indirectly. Eradication efforts can sometimes be necessary to control the spread of non-native species, but they can also have negative impacts on native species. It is important to weigh the potential benefits and risks of eradication efforts before taking action.