Results 261 to 270 of about 229,388 (307)

Contrasting responses of functional diversity to major losses in taxonomic diversity [PDF]

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2018
Significance Global biodiversity consists not only of the sum of taxonomic units such as species, but also of their ecological or functional variety. These two components of biodiversity might be expected to rise or fall in tandem, but we find they are capable of strikingly independent behavior.
Stewart M Edie   +2 more
exaly   +5 more sources

Dynamics of taxonomic diversity

Paleobiology, 1980
A general model of taxonomic diversity, incorporating diversity-dependent rates of origination and extinction, is constructed to examine the dynamic responses of diversity to perturbation. The model predicts that the trajectories of diversification increase and decrease are substantially different.
Timothy R. Carr, Jennifer A. Kitchell
openaire   +1 more source

Rarefaction and Taxonomic Diversity

Biometrics, 1982
Rarefaction is a technique that corrects for unbalanced sample sizes, which are often a major problem in comparisons of diversity. The rarefaction curve is the expected number of higher taxonomic groups, such as families or genera, represented in a random selection of lower taxonomic units, such as species or individuals. The shapes of these curves are
John J. Gart   +2 more
openaire   +1 more source

Generation and Maintenance of Gradients in Taxonomic Diversity

Science, 1969
Latitudinal gradients in diversity of organisms represent an equilibrium distribution for at least the last 270 × 10 6 years. Faunas endemic to tropical regions evolved significantly faster than extra-tropical faunas.
F G, Stehli, R G, Douglas, N D, Newell
openaire   +2 more sources

Taxonomic diversity of the freshwater Zooplankton in Argentina: A review

Limnologica, 2023
Fil: Jose, Susana Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral.
Jose, Susana Beatriz   +4 more
openaire   +2 more sources

Taxonomic diversity in the biology of migration

Canadian Journal of Zoology, 2014
Migration is widespread across taxa and highly variable both within and among groups. There have been multiple efforts to synthesize migratory theory across groups and these frameworks benefit from the inclusion of diverse taxa. The objective of this partial series of the Canadian Journal of Zoology was to highlight taxonomic diversity in migration by ...
Liam P. McGuire, Erin E. Fraser
openaire   +1 more source

Measuring beta‐diversity from taxonomic similarity

Journal of Vegetation Science, 2007
AbstractQuestion: The utility of beta (β‐) diversity measures that incorporate information about the degree of taxonomic (dis)similarity between species plots is becoming increasingly recognized. In this framework, the question for this study is: can we define an ecologically meaningful index of β‐diversity that, besides indicating simple species ...
Giovanni Bacaro   +2 more
openaire   +4 more sources

Allergenic relationship between taxonomically diverse pollens

Clinical & Experimental Allergy, 1995
SummaryBackground Skin tests and tests for IgE antibodies show that subjects are usually sensitive to a number of different pollens, frequently from taxonomically diverse species which are assumed to be allergenically non‐crossreactive. This suggests that the presence of IgE antibody‐reactivity to an individual pollen may not necessarily have ...
N H, Pham, B A, Baldo
openaire   +2 more sources

Geminiviruses: Taxonomic Structure and Diversity in Genomic Organization

Recent Patents on Biotechnology, 2020
Background: Geminiviridae is one of the best-characterized and hence, one of the largest plant-virus families with the highest economic importance. Its members characteristically have a circular ssDNA genome within the encapsidation of twinned quasi-icosaheadral virions (18-38 nm size-range).
Saurabh Kulshrestha   +2 more
openaire   +2 more sources

Taxonomic diversity of anaerobic glycerol dissimilation in the Enterobacteriaceae

Research in Microbiology, 1995
A total of 1,123 strains representing 128 taxa in the Enterobacteriaceae (named species or subspecies and genomic species) were screened for the presence of glycerol dehydrogenases and 1,3-propanediol dehydrogenase. Only eight taxa, Citrobacter freundii sensu stricto, C. youngae, C. braakii, C.
O M, Bouvet   +3 more
openaire   +2 more sources

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