iaor {BAT}R Documentation

Interspecific abundance-occupancy relationship (IAOR).

Description

Fits and compares several of the most supported models for the IAOR.

Usage

iaor(comm)

Arguments

comm

A sites x species matrix with abundance values.

Details

Locally abundant species tend to be widespread while locally rare species tend to be narrowly distributed. That is, for a given species assemblage, there is a positive interspecific abundance-occupancy relationship (Brown 1984). This function compares some of the most commonly used and theoretically or empirically suported models (Nachman 1981; He & Gaston 2000; Cardoso et al. subm.).

Value

A matrix with the different model parameters and explanatory power.

References

Brown, J.H. (1984) On the relationship between abundance and distribution of species. American Naturalist, 124: 255-279.

Cardoso, P., Branco, V.V., Borges, P.A.V., Carvalho, J.C., Rigal, F., Gabriel, R., Mammola, S., Cascalho, J. & Correia, L. (subm.) Automated discovery of relationships, models and principles in ecology. Pre-print available from bioRxiv doi: http://dx.doi.org/10.1101/027839

He, F.L. & Gaston, K.J. (2000) Estimating species abundance from occurrence. American Naturalist, 156: 553-559.

Nachman, G. (1981) A mathematical model of the functional relationship between density and spatial distribution of a population. Journal of Animal Ecology, 50: 453-460.

Examples

comm <- matrix(c(4,3,2,1,5,4,3,2,3,2,1,0,6,3,0,0,0,0,0,0), nrow = 5, ncol = 4, byrow = TRUE)
iaor(comm)

[Package BAT version 2.6.0 Index]