Description Usage Arguments Details Value Author(s) References See Also Examples
Simulate species colonization from mainland to islands with different sizes.
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n.isl |
numeric, number of islands. |
ar.min |
numeric, area of the smallest island. |
ar.max |
numeric, area of the biggest island. |
S |
numeric, number of species (species richness from mainland). |
seed.rain |
numeric, seed rain. Number of seeds colonizing islands on each time. |
abund |
numeric, abundance of each species in the seed rain. |
tmax |
numeric, maximum time for the simulations. |
anima |
logical; if TRUE, show simulation frames. |
The mainland has richness (S) and the evenness can be controled argument abund. The 'abund' argument can be one of these 3 options:
a vector with the same length of the species richness, meaning the proportion of each species population;
a single value more than 1 representing equal abundance of each species (maximum evenness);
a single value between 0 and 1, meaning the model of geometric species rank-abundance distribution. The model is: abund*(1-abund)*((1:S)-1), where S is the number of species.
'archip' returns 3 graphics:
The species-area relationship: number of species x island area at the end of the simulation. It also returns the coefficients c and z from species-area relationship S=cA^z.
Colonization rate curves: colonization (number of species per cycle) x number of species for each island.
Passive colonization: number of species x time for each island.
'archip' also returns an invisible array with the simulation results.
Alexandre Adalardo de Oliveira ecovirtualpackage@gmail.com
Gotelli, N.J. 2008. A primer of Ecology. 4th ed. Sinauer Associates, 291pp.
animaColExt
, bioGeoIsl
,
http://ecovirtual.ib.usp.br
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