Invasive+Species+Connection+With+Native+Species

=Connections between invasive species and native species.= = = =All the work under has been reworded.=

Invasive species can make life hard for native species. Here is an example. The Galapagos conservancy, conservation organization, continue to exterminate all the goats from the Galapagos islands an island off the coast of Ecuador. The fast grazing goats are a threat to the Giant tortoises. Rats are also a threat because they eat the eggs of the tortoises and other native species. Bacteria viruses also kill the tortoises.

Alien species have varied effects on native species. The most common and destructive is the competition for food and basic survival with native species. Invasive species can also impact native species by breeding with another species and making a hybrid (these can not reproduce and will become an invasive species itself), damage human activity (like clogging up pipes), some invasive species unable farming infect forests and bring in diseases. For example the West Nile Virus, which is fatal to birds, reptiles, mammals, and even people.

A lot of invasive species have token over other habitats and damage one or more native species. Besides damaging the economy invasive species can halt tourism. There are a couple of levels of invasive species. I will show you the second level down below:

The second level of invasive species only affects one or few native species. An example is the North American gray squirrel (Scirurus Carolinenis) was introduced to Britain in 1876. It has spread and competes with the red squirrel (Sciurus vulgaris). The red squirrels are continuing to decline.

References: http://www.thenakedscientists.com/forum/index.php?topic=42820.0 http://www.enviroliteracy.org/article.php/40.html http://en.wikipedia.org/wiki/Invasive_species#Impacts_of_wildfire http://www.pbs.org/wgbh/nova/nature/impact-invasive-species.html#