Immigration: Organisms are introduced into new ecosystems by a variety of methods. Seeds, spores, and small animals may be floated on winds or water currents over long distances. Sometimes organisms are carried as hitchhikers in the fur, feather, or intestines of animals traveling from one place to another. Some animals travel as adults flying, swimming, or walking.
Population Size (Factors-2)
In this article we will discuss Population Size (Factors-2)