objects/island-biogeography.html

Island Biogeography - steady state model

1. description of the processes that maintain and decrease species diversity

immigration from a source (inverse to the distance)

extinction (local) (rate is inverse to the size, smaller size more chance of extinction)

2. system model of this process (draw on board)

number of species, immigration rate, extinction rate

controlling factors over each

 

 

equations

immigration = 10/island_distance

loss_of_species = 10*species/island_size

will lead to a steady state with input = output

 

3. each of these situations can reach a steady state

can study with simulations (models/island biogeog.)

fixed distance

fixed size (100, 200, 400 for example)

4. Island biogeography model can be applied to thinking about reserves and cooridors