island biogeography theory?
what are 2 key predictions of island biogeography theory?
- BioLizLv 79 years agoFavorite Answer
Island biogeography tries to explain how many species can live under certain conditions. In the beginning, it tried to explain how many species can live on islands, which are surrounded by water. How did the animal and plants get on that island?
But nowadays, island biogeography is a broader field. It also looks at e.g. a lake surrounded by dry land, a forest surrounded by agricultural land, etc. Biologically speaking, these could be considered "islands" as well. The principals stay the same.
The 2 key effects that island biogeography studies are:
1. distance effect: How far is the island from an area with species that could come to the island? In the case of a real island, this could be the distance from the island to the mainland, or to another island that already has species on them.
2. area effect: what is the size of the island? The bigger the island, the more chance a species will have to be able to live on that island. Think of the opportunities between a single rock (not much chance of survival), or a bigger island with grasslands, forests, or even a fresh water lake (much more chance).