Patterns in species richness
3 important questions on Patterns in species richness
What is predator mediated co-existence?
When predation allows otherwise competitively inferior species to coexist with their superiors.
Explain the 4 predictions of the theory of island biogeography.
- The number of species on an island should eventually become roughly constant through time.
- This should be a result of a continual turnover of species, with some becoming extinct and others migrating.
- Large islands should support more species than small islands.
- Species number should decline with the increasing remoteness of an island.
Is an island always land in sea or water?
No, an island can also be:
- A lake in a 'sea' of land
- Mountaintops are high-altitude islands in low altitude 'ocean'
- Gaps in a forest canopy where a tree has fallen are islands in a 'sea' of trees
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