Description Usage Arguments Value Author(s) References See Also Examples
Simulates island biogeographical models, with rates of colonization and extinction for islands of different sizes and distances to the mainland.
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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 distance effects. Should be a number between 0 to 1. When the ration is 1 the extinction is only affected by size and colonization only by distance. The default ratio is 0.5, meaning that distance and size equally influence colonization and extinction. |
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. |
'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.
Alexandre Adalardo de Oliveira ecovirtualpackage@gmail.com
Gotelli, N.J. 2008. A primer of Ecology. 4th ed. Sinauer Associates, 291pp.
animaColExt
archip
,
http://ecovirtual.ib.usp.br
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