Distance-Decay Analysis

Analyze how species richness changes with distance from focal points.

Usage

distanceDecay(
  x,
  coords,
  n_seeds = 50L,
  breaks = NULL,
  distance = c("euclidean", "haversine"),
  progress = TRUE,
  seed = NULL
)

Arguments

x

A site-by-species matrix.

coords

A data.frame with x and y columns.

n_seeds

Integer. Number of focal points.

breaks

Numeric vector. Distance thresholds. Default auto-calculated.

distance

Character. Distance method.

progress

Logical. Show progress?

seed

Integer. Random seed.

Value

An object of class spacc_decay with distance-species relationships.

References

Nekola, J.C. & White, P.S. (1999). The distance decay of similarity in biogeography and ecology. Journal of Biogeography, 26, 867-878.

Soininen, J., McDonald, R. & Hillebrand, H. (2007). The distance decay of similarity in ecological communities. Ecography, 30, 3-12.