Statistical comparison of diversity decomposition metrics across multiple island systems

Tests whether in-situ speciation, import, and export counts differ across islands using a chi-square test, and whether in-situ and colonization rates differ across islands using a Kruskal-Wallis test. Rates are computed internally from the counts and total species per island.

Usage

compare_islands(div)

Arguments

div

A data frame returned by decompose_diversity.

Value

A named list with elements:

counts_test

Chi-square test comparing n_insitu, n_import, and n_export across islands.

insitu_rate_test

Kruskal-Wallis test on per-island in-situ speciation rates (n_insitu / n_species).

colonization_rate_test

Kruskal-Wallis test on per-island colonization rates ((n_import + n_export) / 2 / n_species).