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