sim.sad: Simulation of species abundance distributions (SAD).
In BAT: Biodiversity Assessment Tools

sim.sad

R Documentation

Simulation of species abundance distributions (SAD).

Description

Creates artificial communities following given SADs.

Usage

sim.sad(n, s, sad = "lognormal", sd = 1)

Arguments

`n`	total number of individuals.
`s`	number of species.
`sad`	The SAD distribution type (lognormal, uniform, broken stick or geometric). Default is lognormal.
`sd`	The standard deviation of lognormal distributions. Default is 1.

Details

Species Abundance Distributions may take a number of forms. A lognormal SAD probably is the most supported by empirical data, but we include other common types useful for testing multiple algorithms including several of the functions in BAT.

Value

A matrix of species x abundance per species.

Examples

comm1 <- sim.sad(10000, 100)
comm2 <- sim.sad(10000, 100, sd = 2)
comm3 <- sim.sad(10000, 100, sad = "uniform")
par(mfrow=c(1,3))
hist(log(comm1$Freq))
hist(log(comm2$Freq))
hist(log(comm3$Freq))

BAT documentation built on May 29, 2024, 7:35 a.m.