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- Publications
- Influence
Quantifying biodiversity: procedures and pitfalls in the measurement and comparison of species richness
- N. Gotelli, R. Colwell
- Biology
- 22 July 2001
Species richness is a fundamental measurement of community and regional diversity, and it underlies many ecological models and conservation strategies. In spite of its importance, ecologists have not… Expand
Estimating terrestrial biodiversity through extrapolation.
- R. Colwell, J. Coddington
- Biology, Medicine
- Philosophical transactions of the Royal Society…
- 29 July 1994
Both the magnitude and the urgency of the task of assessing global biodiversity require that we make the most of what we know through the use of estimation and extrapolation. Likewise, future… Expand
INTERPOLATING, EXTRAPOLATING, AND COMPARING INCIDENCE-BASED SPECIES ACCUMULATION CURVES
- R. Colwell, C. Mao, J. Chang
- Mathematics
- 1 October 2004
A general binomial mixture model is proposed for the species accumulation function based on presence-absence (incidence) of species in a sample of quadrats or other sampling units. The model covers… Expand
Models and estimators linking individual-based and sample-based rarefaction, extrapolation and comparison of assemblages
- R. Colwell, A. W. Chao, +4 authors J. Longino
- Mathematics
- 1 March 2012
Aims In ecology and conservation biology, the number of species counted in a biodiversity study is a key metric but is usually a biased underestimate of total species richness because many rare… Expand
A new statistical approach for assessing similarity of species composition with incidence and abundance data
- A. Chao, R. Chazdon, R. Colwell, Tsung-Jen Shen
- Biology
- 17 December 2004
The classic Jaccard and Sorensen indices of compositional similarity (and other indices that depend upon the same variables) are notoriously sensitive to sample size, especially for assemblages with… Expand
Rarefaction and extrapolation with Hill numbers: a framework for sampling and estimation in species diversity studies
- A. Chao, Nicholas J. Gotelli, +5 authors A. Ellison
- Mathematics
- 1 February 2014
Quantifying and assessing changes in biological diversity are central aspects of many ecological studies, yet accurate methods of estimating biological diversity from sampling data have been elusive.… Expand
Statistical methods for estimating species richness of woody regeneration in primary and secondary rain forests of northeastern Costa Rica
- R. Chazdon, R. Colwell, J. Denslow, M. Guariguata
- Geography
- 1998
The study of plant communities requires a basic understanding of the abundance, distribution, and number of species present. Yet, in obtaining this information, scientists can rarely sample the… Expand
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Global Warming, Elevational Range Shifts, and Lowland Biotic Attrition in the Wet Tropics
- R. Colwell, G. Brehm, C. Cardelús, Alex Gilman, J. Longino
- Environmental Science, Medicine
- Science
- 10 October 2008
Many studies suggest that global warming is driving species ranges poleward and toward higher elevations at temperate latitudes, but evidence for range shifts is scarce for the tropics, where the… Expand
The Mid‐Domain Effect and Species Richness Patterns:What Have We Learned So Far?
- R. Colwell, C. Rahbek, N. Gotelli
- Geography, Medicine
- The American Naturalist
- 13 February 2004
If species' ranges are randomly shuffled within a bounded geographical domain free of environmental gradients, ranges overlap increasingly toward the center of the domain, creating a “mid‐domain”… Expand
Nonbiological Gradients in Species Richness and a Spurious Rapoport Effect
- R. Colwell, G. Hurtt
- Biology
- The American Naturalist
- 1 October 1994
G. C. Stevens showed that an equatorward increase in species richness is often paralleled by a decrease in the mean latitudinal range of species-a pattern he called Rapoport's rule. He reported a… Expand