Question

For the graph depicting the Theory of Island Biogeography Rate (immigration or Extinction Number of Species Present (3) This model is about islands. How does one use this model to understand species turnover in small terrestrial habitats?

Answer 1

Answer:- In the above graph shown which is Rate vs number of species present. It may be reasonable to consider the general island biogeography theory as two related components, the combined effects of area and isolation and the companion dynamic equilibrium between I and E. Based on the premises of the general patterns in island biogeography theory assumes that at a given time, species richness in island is saturated for a new species to colonize as an immigrant, an existing resident species has to become locally extinct. The given model I=E due to competition with other species for niches and resources. In the original MW and in most following descriptions, I and E have often been drawn as symmetrical across the equilibrium for the same island. The first component is well appreciated but the latter is not. Most of the tests tests of MW model were based on area or isolation only because immigration and extinction rates need much more time and greater effort to measure. I and E are most likely asymmetrical in opposite directions, and their positions and shapes could vary drastically among islands and different taxonomic groups.