Evolution of taxonomic diversity gradients in the marine realm: a comparison of Late Jurassic and Recent bivalve faunas

  title={Evolution of taxonomic diversity gradients in the marine realm: a comparison of Late Jurassic and Recent bivalve faunas},
  author={J. Alistair Crame},
Abstract We still have much to learn about the evolution of taxonomic diversity gradients through geologic time. For example, have latitudinal gradients always been as steep as they are now, or is this a phenomenon linked to some form of Cenozoic global climatic differentiation? The fossil record offers potential to address this sort of problem, and this study reconstructs latitudinal diversity gradients for the last (Tithonian) stage of the Jurassic period using marine bivalves. At this time… 

Early Cenozoic Differentiation of Polar Marine Faunas

  • J. Crame
  • Geography, Environmental Science
    PloS one
  • 2013
A global analysis of one of the largest marine clades at the present day, the Neogastropoda, indicates that not only is there a decreases in the number of species from the tropics to the poles but also a decrease in the evenness of their distribution, which points to the key role of seasonality in structuring the highest latitude marine assemblages.

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The low species richness of the Southern Ocean molluscan fauna compared with many tropical sites is confirmed, and is related principally to the absence of the large number of rare taxa that characterize some tropical assemblages.

The Distribution Pattern of Marine Bivalve Death Assemblage From the Western Margin of Bay of Bengal and Its Oceanographic Determinants

The global pattern of shallow marine biodiversity is constructed primarily using the data from extra-tropical sites. A severe knowledge gap in the shallow benthic diversity exists for the tropical

Major Evolutionary Trends

  • M. Hughes
  • Environmental Science, Geography
  • 2013
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Five relationships predicted by the evolutionary speed hypothesis are identified and it is suggested that diversity patterns associated with area, temperature and water availability might all be influenced by a common mechanism associated with biologically available energy and its influence on the tempo of evolution.


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It is found that bivalves as a whole, and both infauna and epifauna separately, show a strong latitudinal diversity gradient that is closely related to mean sea surface temperature (SST), even in analyses of residuals and first differences, which contradicts Thorson's environmental homogeneity hypothesis.

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The geographic distribution of Recent taxa is important in interpreting paleobiogeography and the fossil record of extinction. We examine the latitudinal diversity gradient in Recent marine bivalve

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  • A. Hallam
  • Environmental Science, Geography
  • 1976
Documentation of bivalve generic and species diversity and times of first and last appearance through successive Jurassic stages in Europe, together with data on turnover and changes in taxonomic and

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SummaryIn order to elucidate the control of local, regional and global factors on occurrence, distribution and character of Jurassic reefs, reefal settings of Mid and Late Jurassic age from

Facies analysis of the Lo Valdés Formation (Tithonian–Hauterivian) of the High Cordillera of central Chile, and the palaeogeographic evolution of the Andean Basin

Abstract Facies descriptions and environmental interpretations are given for outstanding sections of marine Tithonian to Hauterivian strata in the High Cordillera of the central Chilean Andes.

Geology and paleontology of the Jurassic and Cretaceous beds of southern Tanganyika

Part I of the thesis describes the geology of an area of about 400 square miles in the hinterland of Kiswere in the coastal region of southern Tanganyika. More detail is available of the

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Analysis of the end-Cretaceous mass extinction, based on 3514 occurrences of 340 genera of marine bivalves (Mollusca), suggests that extinction intensities were uniformly global; no latitudinal


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