spacc-package: spacc: Fast Spatial Species Accumulation Curves

In spacc: Fast Spatial Species Accumulation Curves

spacc: Fast Spatial Species Accumulation Curves

Description

High-performance spatial species accumulation curves using nearest-neighbor algorithms. Implements 'kNN' and 'kNCN' sampling methods with a 'C++' backend for speed. Supports Hill numbers (q=0,1,2), beta diversity partitioning (turnover/nestedness), coverage-based rarefaction and extrapolation, phylogenetic diversity (Faith's PD, mean pairwise distance, mean nearest taxon distance), functional diversity accumulation, diversity-area relationships (DAR), endemism-area curves, sampling-effort correction and fragmentation analysis, and species-area relationship (SAR) models based on extreme value theory (EVT). Multiple starting points (seeds) provide uncertainty quantification. Methods are described in 'Chao' et al. (2014) \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1890/13-0133.1")}, 'Baselga' (2010) \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1111/j.1466-8238.2009.00490.x")}, 'Chao' and 'Jost' (2012) \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1890/11-1952.1")}, 'Faith' (1992) \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1016/0006-3207(92)91201-3")}, 'Ma' (2018) \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1002/ece3.4526")}, 'Borda-de-Agua' et al. (2025) \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1038/s41467-025-59239-7")}, 'Hanski' et al. (2013) \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1073/pnas.1311190110")}, and 'Jost' (2007) \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1890/06-1736.1")}.

Author(s)

Maintainer: Gilles Colling [e-mail] (ORCID) [copyright holder]

Authors:

• Gilles Colling [e-mail] (ORCID) [copyright holder]

See Also

Useful links:

• https://gillescolling.com/spacc/

• https://github.com/gcol33/spacc

• Report bugs at https://github.com/gcol33/spacc/issues

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