Unified neutral theory of biodiversity
Numerical simulations, and visualizations, of the unified neutral theory of biodiversity
untb uses two classes of object to represent an
count and class
census. In essense, a
count object is a table of species abundances and a
object is a list of individuals. See
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
display.untb() displays a semi-animated
graphic of an ecosystem undergoing neutral drift.
- Chinese restaurant
- Chinese restaurant process
- 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
a <- untb(start=rep(1,100),prob=0.005,gens=5000,keep=FALSE) preston(a) no.of.spp(a) display.untb(start=rep(1,100),prob=0.1,gens=1000) data(butterflies) plot(butterflies,uncertainty=TRUE)