An introduced, alien, exotic, non-indigenous, or non-native species, or simply an introduction, is a species living outside its native distributional range, which has arrived there by human activity, either deliberate or accidental. A list of introduced species is given in a separate article. The effect of introduced species on natural environments is a controversial subject, and one that has gained much scrutiny by scientists, governments, farmers and others. Invasive species are damaging to the ecosystem they are introduced into, while others have no negative effect and can, in fact, be beneficial, for example as an alternative to pesticides in agriculture. اعرف منهم ناس و الله :D
Posted on: Wed, 07 Aug 2013 16:46:38 +0000
Trending Topics
Recently Viewed Topics
© 2015