Here's a breakdown:
Native Species:
* Origin: Naturally occurring in a specific geographic area, having evolved and lived there for a long time.
* History: Established a natural balance within the ecosystem, interacting with other species and contributing to the ecosystem's health.
* Examples: Redwood trees in California, American bison on the Great Plains, gray wolves in Yellowstone National Park.
Introduced Species (also called non-native or exotic species):
* Origin: Brought to a new geographic area by humans, either intentionally or unintentionally.
* History: Lacking a natural history in the new ecosystem, they may disrupt the existing balance.
* Examples: Zebra mussels in the Great Lakes, kudzu vine in the southeastern US, Burmese pythons in the Florida Everglades.
Important points:
* Not all introduced species are harmful. Some may become beneficial, integrating well into the ecosystem. However, many have negative impacts.
* Invasive species are a subset of introduced species that become problematic, causing ecological damage, economic losses, or harm to human health.
Consequences of Introduced Species:
* Competition: Introduced species can outcompete native species for resources like food, water, and space.
* Predation: Introduced predators can decimate populations of native species.
* Disease: Introduced species can bring new diseases that can harm native species.
* Habitat alteration: Introduced species can alter the physical environment, leading to changes in habitat for native species.
In summary:
* Native species are an integral part of an ecosystem's natural balance, contributing to its health and stability.
* Introduced species can disrupt this balance, leading to a range of negative consequences.
It's crucial to understand these differences to better manage ecosystems and protect biodiversity.
