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Quantifying biodiversity: procedures and pitfalls in the measurement and comparison of species richness
A series of common pitfalls in quantifying and comparing taxon richness are surveyed, including category‐subcategory ratios (species-to-genus and species-toindividual ratios) and rarefaction methods, which allow for meaningful standardization and comparison of datasets.
Estimating terrestrial biodiversity through extrapolation.
- Robert K. Colwell, J. Coddington
- Environmental SciencePhilosophical transactions of the Royal Society…
- 29 July 1994
The importance of using 'reference' sites to assess the true richness and composition of species assemblages, to measure ecologically significant ratios between unrelated taxa, toMeasure taxon/sub-taxon (hierarchical) ratios, and to 'calibrate' standardized sampling methods is discussed.
INTERPOLATING, EXTRAPOLATING, AND COMPARING INCIDENCE-BASED SPECIES ACCUMULATION CURVES
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…
Models and estimators linking individual-based and sample-based rarefaction, extrapolation and comparison of assemblages
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…
Microbial biogeography: putting microorganisms on the map
- Jennifer B. H. Martiny, B. Bohannan, J. T. Staley
- Environmental Science, BiologyNature Reviews Microbiology
- 1 February 2006
Current evidence confirms that, as proposed by the Baas-Becking hypothesis, 'the environment selects' and is, in part, responsible for spatial variation in microbial diversity, but recent studies also dispute the idea that 'everything is everywhere'.
A new statistical approach for assessing similarity of species composition with incidence and abundance data
This work provides a probabilistic derivation for the classic, incidence-based forms of Jaccard and Sorensen indices of compositional similarity and proposes estimators for these indices that include the effect of unseen shared species, based on either (replicated) incidence- or abundancebased sample data.
Rarefaction and extrapolation with Hill numbers: a framework for sampling and estimation in species diversity studies
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.…
Global Warming, Elevational Range Shifts, and Lowland Biotic Attrition in the Wet Tropics
- Robert K. Colwell, G. Brehm, C. Cardelús, A. Gilman, J. Longino
- Environmental ScienceScience
- 10 October 2008
It is concluded that tropical lowland biotas may face a level of net lowlandBiotic attrition without parallel at higher latitudes and that a high proportion of tropical species soon faces gaps between current and projected elevational ranges.
Statistical methods for estimating species richness of woody regeneration in primary and secondary rain forests of northeastern Costa Rica
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…
Thermal-safety margins and the necessity of thermoregulatory behavior across latitude and elevation
- J. Sunday, A. Bates, R. Huey
- Environmental ScienceProceedings of the National Academy of Sciences
- 10 March 2014
It is found that most terrestrial ectotherms are insufficiently tolerant of high temperatures to survive the warmest potential body temperatures in exposed habitats and must therefore thermoregulate by using shade, burrows, or evaporative cooling and show why heat-tolerance limits are relatively invariant in comparison with cold limits.