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Last data update: 2014.03.03

R: Island Biogeographical Model

bioGeoIsl

R Documentation

Island Biogeographical Model

Description

Simulates island biogeographical models, with rates of colonization and extinction for islands of different sizes and distances to the mainland.

Usage

bioGeoIsl(area, dist, P, weight.A=0.5, a.e=1, b.e=-0.01, c.i=1, d.i=-0.01, 
e.i=0, f.i=.01, g.e=0, h.e=.01)

Arguments

`area`	a vector with the sizes of the island areas. It must have the same length as 'dist'
`dist`	a vector with the distances of the islands to the mainland. It must have the same length as 'areas'
`P`	the number of species in the mainland (species richness of the pool).
`weight.A`	ratio between the area and the distance effects.
`a.e`	basal extiction coefficient for area.
`b.e`	extinction/area coefficient.
`c.i`	basal colonization coefficient for distance.
`d.i`	numeric, colonization/distance coefficient.
`e.i`	basal colonization coefficient for area.
`f.i`	colonization/area coefficient.
`g.e`	basal extinction coefficient for distance.
`h.e`	extinction/distance coefficient.

Value

'bioGeoIsl' returns a graph with the rates of colonization and extinction in relation with the species richness for each island.

'bioGeoIsl' also returns a invisible data frame with the values for area, distance and species richness (S) for each island.

Author(s)

Alexandre Adalardo de Oliveira ecovirtualpackage@gmail.com

References

Gotelli, N.J. 2008. A primer of Ecology. 4th ed. Sinauer Associates, 291pp.

Examples

## Not run: 
bioGeoIsl(area=c(5,10,50,80), dist=c(10,100,100,10), P=100, weight.A=.5, a=1, 
b=-0.01, c=1, d=-0.01, e=0, f=.01, g=0, h=.01)

## End(Not run)