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Unified neutral theory of biodiversity

untb.package.Rd

Numerical simulations, and visualizations, of the unified neutral theory of biodiversity

Details

Package untb uses two classes of object to represent an ecosystem: class count and class census. In essence, a count object is a table of species abundances and a census object is a list of individuals. See ?census and ?count for more details. Although objects of either class can be coerced to the other, class count is the preferred form: it is a more compact representation, especially for large ecosystems.

The package simulates neutral ecological drift using function untb(). Function display.untb() displays a semi-animated graphic of an ecosystem undergoing neutral drift.

Author

Robin K. S. Hankin

Maintainer: <hankin.robin@gmail.com>

References

  • S. P. Hubbell 2001. “The Unified Neutral Theory of Biodiversity”. Princeton University Press.

  • R. K. S. Hankin 2007. Introducing untb, an R package for simulating ecological drift under the unified neutral theory of biodiversity. Journal of Statistical Software, volume 22, issue 12

Examples

a <- untb(start=rep(1,100),prob=0.005,gens=5000,keep=FALSE)
preston(a)
#>                   1  2  3-4  5-8  9-16  17-32  33-Inf
#> number of species  0 0    1    0     1      0       2
no.of.spp(a)
#> [1] 4

display.untb(start=rep(1,100),prob=0.1,gens=1000)


data(butterflies)
plot(butterflies,uncertainty=TRUE)