Question

How do exotic species threaten ecosystems?

Answer 1

Invasive species move to the new ecosystem and change or collapse the total ecosystem and cause damage to the existing species. Food sources will be reduced for the existing species. Predation will occur. Because it destroys the small living organism in the native place so it leads to extinction. It overgrazed the vegetation which is not native vegetative species. Alteration of habitat will result in soil erosion and produce less water source.

Complete answer:
Exotic species are the species like aliens, nonnative, non indigenous or invasive species which live outside of their geographical region. Exotic species cannot survive in the new environment because it cannot change their habit based on the environment, climatic condition and competition. Exotic species are growing in the ecosystem and compete over the resources and predation. They threaten the native species. So it is called an invasive species. The species which threaten the other animals for their own needs is called the invasive species. They can easily change or adapt for the new food web of the ecosystem and it is increasing the population very fastly.
These exotic species are harmful to the ecosystem and it affects the biodiversity. It affects the health of fish, wild life, plants and ecosystem. It involves the natural communities and ecological process. It threatened the native species by being the competitor. It destroys the native food web ecosystem or makes some changes in the ecosystem. It affects humans also. The species which is growing fast or aggressive and reproduces fastly is named to be invasive. It has the potential to harm nature.

Note:
Exotic fishes are also called the alien species because it is not native and it belongs to the origin of another world or from abroad. Exotic species are very harmful and also the costliest one. Invasive species can be plants, animals, and also insects. But exotic trees are very useful to recreate the native trees and repair the forest areas. Zebra mussels are used to filter the water. It had an impact on animal and human health. It reduces the growth of crops in agricultural land. But they are good survivors in all the places.