Galapagos Islands

The original ancestor of the tortoises was probably of normal size and evolved into the present day giants after its arrival in Galapagos. This is due to a phenomenon seen in many island ecosystems where gigantism evolves because there is no longer any need to hide from predators and because there are no other similar animals to compete with for food. Once the tortoises spread around the archipelago, they evolved on their isolated islands into the different races we see today, some with domed carapaces (shells), and others with saddleback carapaces. The unusual saddle shape is believed to have evolved several times on different islands, showing that it must be a very successful design for life in Galapagos.

http://www.spallek.com/photo/galapagos/June7/Website/_MG_7507.jpg

Biodiversity

Preserving biodiversity might have a global effect on the world in ways such as inspiring more areas to do the same or maybe changing the way people live which can change the way people look at the world.

It can effect other areas by influencing the food chain in ways like forcing animals to find a new home in order to find food or water. It can also convert the food chain to a completely different chain, snakes could be eating elephants because the cant find any other food.

Preserving biodiversity csnenhance peoples live in ways such as how the view the world. It can make them thing about what their world really looks like and try to do something to change a simple biodiversity into a world wide effect.