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Robert K. Colwell

Museum Curator Adjoint in Entomology


Curriculum vitae


robertkcolwell [at] gmail.com


Museum of Natural History

University of Colorado

Boulder, CO 80309, USA




robertkcolwell [at] gmail.com


Museum of Natural History

University of Colorado

Boulder, CO 80309, USA



Ecological and biogeographic null hypotheses for comparing rarefaction curves


Journal article


L. Cayuela, N. Gotelli, R. K. Colwell
2015

Semantic Scholar DOI
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Cite

APA   Click to copy
Cayuela, L., Gotelli, N., & Colwell, R. K. (2015). Ecological and biogeographic null hypotheses for comparing rarefaction curves.


Chicago/Turabian   Click to copy
Cayuela, L., N. Gotelli, and R. K. Colwell. “Ecological and Biogeographic Null Hypotheses for Comparing Rarefaction Curves” (2015).


MLA   Click to copy
Cayuela, L., et al. Ecological and Biogeographic Null Hypotheses for Comparing Rarefaction Curves. 2015.


BibTeX   Click to copy

@article{l2015a,
  title = {Ecological and biogeographic null hypotheses for comparing rarefaction curves},
  year = {2015},
  author = {Cayuela, L. and Gotelli, N. and Colwell, R. K.}
}

Abstract

The statistical framework of rarefaction curves and asymptotic estimators allows for an effective standardization of biodiversity measures. However, most statistical analyses still consist of point comparisons of diversity estimators for a particular sampling level. We introduce new randomization methods that incorporate sampling variability encompassing the entire length of the rarefaction curve and allow for statistical comparison of i ≥2 individual-based, sample-based, or coverage-based rarefaction curves. These methods distinguish between two distinct null hypotheses: the ecological null hypothesis (H0eco) and the biogeographical null hypothesis (H0biog). H0eco states that the i samples were drawn from a single assemblage, and any differences among them in species richness, composition, or relative abundance reflect only sampling effects. H0biog states that the i samples were drawn from assemblages that differ in their species composition but share similar species richness and species abundance distri...


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