gammaDiversity: Gamma Diversity (Regional)

In spacc: Fast Spatial Species Accumulation Curves

Gamma Diversity (Regional)

Description

Compute Hill numbers for the pooled community across all sites.

Usage

gammaDiversity(x, q = c(0, 1, 2))

Arguments

x	A site-by-species matrix (abundance data).
q	Numeric vector. Orders of diversity. Default c(0, 1, 2).

Details

Gamma diversity represents regional (total) diversity across all sites. It is computed by pooling abundances across all sites and calculating Hill numbers on the combined community.

Value

A named numeric vector with gamma diversity for each q.

References

Jost, L. (2007). Partitioning diversity into independent alpha and beta components. Ecology, 88, 2427-2439.

See Also

alphaDiversity() for local diversity, diversityPartition() for full alpha-beta-gamma decomposition

Examples

species <- matrix(rpois(50 * 30, 2), nrow = 50)
gammaDiversity(species, q = c(0, 1, 2))

spacc documentation built on June 20, 2026, 5:07 p.m.