Evolution and the latitudinal diversity gradient: speciation, extinction and biogeography.
- G. Mittelbach, D. Schemske, M. Turelli
- Environmental Science, GeographyEcology Letters
- 1 April 2007
Two major hypotheses for the origin of the latitudinal diversity gradient are reviewed, including the time and area hypothesis and the diversification rate hypothesis, which hold that tropical regions diversify faster due to higher rates of speciation, or due to lower extinction rates.
Is There a Latitudinal Gradient in the Importance of Biotic Interactions
- D. Schemske, G. Mittelbach, H. Cornell, James M Sobel, K. Roy
- Environmental Science
- 6 February 2009
The hypothesis that biotic interactions are more important in the tropics is supported, but additional research is needed on latitudinal comparisons of rates of molecular evolution for genes involved inBiotic interactions, estimates of gradients in interaction strength, and phylogenetic comparisons of the traits that med...
Out of the Tropics: Evolutionary Dynamics of the Latitudinal Diversity Gradient
- D. Jablonski, K. Roy, J. W. Valentine
- Environmental ScienceScience
- 6 October 2006
A global analysis of genera and subgenera of marine bivalves over the past 11 million years supports an “out of the tropics” model, in which taxa preferentially originate in the Tropics and expand toward the poles without losing their tropical presence.
Marine latitudinal diversity gradients: tests of causal hypotheses.
- K. Roy, D. Jablonski, J. W. Valentine, G. Rosenberg
- Environmental ScienceProceedings of the National Academy of Sciences…
- 31 March 1998
A database of the geographic ranges of 3,916 species of marine prosobranch gastropods living on the shelves of the western Atlantic and eastern Pacific Oceans, from the tropics to the Arctic Ocean, finds diversity gradients are strikingly similar despite many important physical and historical differences between the oceans.
Effects of sampling standardization on estimates of Phanerozoic marine diversification
- J. Alroy, C. Marshall, A. Webber
- Environmental Science, GeographyProceedings of the National Academy of Sciences…
- 15 May 2001
A new database of this kind for the Phanerozoic fossil record of marine invertebrates is introduced and four substantially distinct analytical methods that estimate taxonomic diversity by quantifying and correcting for variation through time in the number and nature of inventories are applied.
Ecological and evolutionary consequences of size‐selective harvesting: how much do we know?
- Phillip B. Fenberg, K. Roy
- Environmental ScienceMolecular Ecology
- 1 January 2008
This work uses examples from both aquatic and terrestrial habitats to illustrate some of the biological consequences of size‐selective harvesting and discusses possible future directions of research as well as changes in management policy needed to mitigate its negative biological impacts.
Scales of climatic variability and time averaging in Pleistocene biotas: implications for ecology and evolution.
- K. Roy, J. W. Valentine, D. Jablonski, S. Kidwell
- Environmental Science, GeographyTrends in Ecology & Evolution
- 1 November 1996
Dissecting latitudinal diversity gradients: functional groups and clades of marine bivalves
- K. Roy, D. Jablonski, J. W. Valentine
- Environmental ScienceProceedings of the Royal Society of London…
- 7 February 2000
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.
Anthropogenic impacts and historical decline in body size of rocky intertidal gastropods in southern California
- K. Roy, A. Collins, B. J. Becker, Emina Begovic, J. Engle
- Environmental Science
- 1 March 2003
Abstract The diverse fauna and flora of rocky intertidal ecosystems are being impacted by the activities of rapidly increasing coastal populations in many regions of the world. Human harvesting of…
Eastern Pacific molluscan provinces and latitudinal diversity gradient: no evidence for "Rapoport's rule".
- K. Roy, D. Jablonski, J. W. Valentine
- Environmental ScienceProceedings of the National Academy of Sciences…
- 13 September 1994
Latitudinal ranges of eastern Pacific marine molluscan species are analyzed, and species diversity gradients and range magnitudes appear to vary independently, with the spatial distribution of major oceanographic barriers exerting a strong influence on latitudinal ranges.
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