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Insular biogeography or island biogeography is a field within biogeography that examines the factors that affect the species richness and diversification of isolated natural communities. The theory was originally developed to explain the pattern of the species–area relationship occurring in oceanic islands.


A modified version of the classical island biogeography model proposed by MacArthur and Wilson (1963) is depicted above. The model considers the interaction of two main parameters, colonization and extinction, and then considers island size and distance from mainland as predictors of the species richness found on each island.


Wilson of Harvard, developed a theory of "island biogeography" to explain such uneven distributions. They proposed that the number of species on any island reflects a balance between the rate at which new species colonize it and the rate at which populations of established species become extinct.


The Basic Model of Island Biogeography The model is one of a dynamic equilibrium between immigration of new species onto islands and the extinction of species previously established. There are 2 things to note immediately: 1) this is a dynamic equilibrium, not a static one.


The Theory of Island Biogeography is a 1967 book by Robert MacArthur and Edward O. Wilson. It is widely regarded as a seminal piece in island biogeography and ecology. The Princeton University Press reprinted the book in 2001 as a part of the "Princeton Landmarks in Biology" series.


In this lesson, you will learn about island biogeography, which is the species composition on an island. Because island habitats are so isolated and unique, the theory of island biogeography ...


Equilibrium Theory of Island Biogeography. Munroe, E.G. (1948) dissertation R. McArthur and E. Wilson (1963, 1967) ... A species-based, hierarchical model of island biogeography. In E. Wiher and P.A. Keddy (eds.) The search for assembly rules in ecological communities. Cambridge Univ. Press. Variable Immigration Abilities Channel Island ...


The island equilibrium model describes the number of species on an island based on the immigration and extinction rates of species on that island. Species have to get to the island from somewhere else, which is the immigration part, and species go extinct from the island as they run out of resources.


Theory of Island Biogeography. Island biogeography (also called insular biogeography) provides some of the best evidence in support of natural selection and the theory of evolution. The term describes an ecosystem that is isolated by being surrounded by different ecosystems. For the purposes of this theory, an island is defined as more than just a piece of land surrounded by water.


Island biogeography is the study of the species composition and species richness on islands. Island biogeography is a study aimed at establishing and explaining the factors that affect species diversity of a specific community. An island in this context, is not just a segment of land surrounded by water.