ecospat.mpa: Minimal Predicted Area
In ecospat: Spatial Ecology Miscellaneous Methods

ecospat.mpa

R Documentation

Minimal Predicted Area

Description

Calculate the minimal predicted area.

Usage

ecospat.mpa (Pred, Sp.occ.xy, perc)

Arguments

`Pred`	Numeric or, SpatRaster predicted suitabilities from a SDM prediction.
`Sp.occ.xy`	xy-coordinates of the species (if Pred is a RasterLayer or a SpatRaster).
`perc`	Percentage of Sp.occ.xy that should be encompassed by the binary map.

Details

The minimal predicted area (MPA) is the minimal surface obtained by considering all pixels with predictions above a defined probability threshold (e.g. 0.7) that still encompasses 90 percent of the species' occurrences (Engler et al. 2004).

Value

Returns the minimal predicted area.

Author(s)

Frank Breiner frank.breiner@wsl.ch with the contribution of Flavien Collart

References

Engler, R., A. Guisan and L. Rechsteiner. 2004. An improved approach for predicting the distribution of rare and endangered species from occurrence and pseudo-absence data. Journal of Applied Ecology, 41, 263-274.

Examples

data(ecospat.testData)
obs <- (ecospat.testData$glm_Saxifraga_oppositifolia
[which(ecospat.testData$Saxifraga_oppositifolia==1)])

ecospat.mpa(obs)
ecospat.mpa(obs,perc=1) ## 100 percent of the presences encompassed

ecospat documentation built on July 4, 2024, 5:06 p.m.