Plot Distance-Decay Relationship

Displays community dissimilarity versus geographic distance with a smooth loess trend. The y-axis is constrained to [0, 1] to reflect the range of Sorensen (binary Bray-Curtis) dissimilarity.

Usage

plot_distance_decay(decay_data)

Arguments

decay_data

A data frame as returned by calculate_distance_decay with columns Distance (pairwise Euclidean distances among quadrat centroids) and Dissimilarity (pairwise Sorensen dissimilarities).

Value

A ggplot object.

Details

Points show pairwise site comparisons; the loess smoother summarizes the overall distance-decay pattern. Input should already exclude self-comparisons.

See also

calculate_distance_decay

Examples

if (FALSE) { # \dontrun{
dd <- calculate_distance_decay(abund_matrix, site_coords)
plot_distance_decay(dd)
} # }