Pleistocene Ice Volumes and Sea-Level Lowering

Donn, William L.; Farrand, William R.; Ewing, Maurice

doi:10.1086/626809

Cited by 118 publications

(40 citation statements)

References 12 publications

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“…The depth of · its outer edge varies between 80 and 140 meters, spanning the world average of 132 meters (Shepard, 1963, p. 257) and lying close to the estimate of 159 meters for the maximum lowering of sea level during Pleistocene glaciations (Donn, Farrand, and Ewing, 1962). Most of the area of the shelf is well below present wave base, which is about 20 meters, as estimated from the position at which waves begin to refract and transmit energy to the sea bottom.…”

Section: ?L"' Gktlumentioning

confidence: 55%

Atlantic Continental Shelf and Slope of the United States - Geologic background

Emery¹

1966

Professional Paper

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Section: ?L"' Gktlumentioning

confidence: 55%

Atlantic Continental Shelf and Slope of the United States - Geologic background

Emery¹

1966

Professional Paper

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“…During ice ages when global temperatures were 5 o C (9 o F) lower than today, much of the ocean's water was tied up in glaciers and sea level was often over one hundred meters (three hundred feet) lower than today (Donn et al, 1962;Kennett, 1982;Oldale, 1985). On the other hand, during the last interglacial period (100,000 years ago) when temperatures were about 1 o C (2 o F) warmer, sea level was approximately 6 meters (20 feet) higher than today (Mercer, 1970).…”

Section: Climate and Sea Levelmentioning

confidence: 99%

Greenhouse effect and sea level rise: The cost of holding back the sea

et al. 1991

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“…The greatest unionid diversity is found in ancient rivers with dynamic hydrogeological histories (Lydeard & Mayden, 1995;Neves et al, 1997). Many of these rivers have undergone reorganization during the cyclic glacial advances and retreats of the Pliocene and Pleistocene (e.g., Donn et al, 1962;Melhorn & Kempton, 1991) or experienced episodic tilt-block tectonics (e.g., Cox, 1994) during the Pleistocene and Early Holocene. These geologic events have profound evolutionary effects by restricting gene flow, causing allopatric speciation through vicariance, or creating opportunities for rapid radiations and secondary contact zones between onceisolated populations through stream-capture events (Roe et al, 2001;Kozak et al, 2006).…”

mentioning

confidence: 99%

Congruence and Conflict Between Molecular and Reproductive Characters When Assessing Biological Diversity in the Western Fanshell Cyprogenia aberti (Bivalvia, Unionidae)¹

Serb

Barnhart

2008

Annals of the Missouri Botanical Garden

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Organisms with complex life histories and unusual modes of genome inheritance can present challenges for phylogenetic reconstruction and accurate assessment of biological diversity. This is particularly true for freshwater bivalves in the family Unionidae because: (1) they have complex life cycles that include a parasitic larva and obligate fish host; (2) they possess both a male and female mitochondrial genome that is transmitted through doubly uniparental inheritance (DUI); and (3) they are found in riverine habitats with complex hydrogeological histories. Examination of mitochondrial DNA (mtDNA) sequences, conglutinate morphology, and host fish compatibility of the western fanshell Cyprogenia aberti (Conrad, 1850) revealed significant character variation across its range. Although variation was correlated among the different data sets and supports discrete groups, these groups did not always correspond to geographically isolated populations. Two discrete mtDNA clades exist sympatrically within most C. aberti populations, and these same clades are also diagnosed by at least one morphological character, egg color. The surprisingly high genetic distance (14. 61%-20.19%) between the members of these sympatric clades suggests heritance infidelity of the two different mitochondrial genomes. This hypothesis was tested and falsified. More general patterns in geography were observed in host fish compatibility. Populations of C. aberti from the major river systems differed in their ability to utilize fish species as hosts. These differences in reproductive traits, which are presumably genetically based, suggest that these populations are not ecologically exchangeable with one another and represent biological diversity not previously recognized within Cyprogenia Agassiz, 1852. KeywordsCentral Highlands, coevolution, Cyprogenia aberti, double uniparental inheritance, mitotype, Unionidae Disciplines Ecology and Evolutionary Biology | Genetics and Genomics CommentsThis article is from Annals of the Missouri Botanical Garden 95 (2008) ABSTRACTOrganisms with complex life histories and unusual modes of genome inheritance can present challenges for phylogenetic reconstruction and accurate assessment of biological diversity. This is particularly true for freshwater bivalves in the family Unionidae because: (1) they have complex life cycles that include a parasitic larva and obligate fish host; (2) they possess both a male and female mitochondrial genome that is transmitted through doubly uniparental inheritance (DUI); and (3) they are found in riverine habitats with complex hydrogeological histories. Examination of mitochondrial DNA (mtDNA) sequences, conglutinate morphology, and host fish compatibility of the western fanshell Cyprogenia aberti (Conrad, 1850) revealed significant character variation across its range. Although variation was correlated among the different data sets and supports discrete groups, these groups did not always correspond to geographically isolated populations. Two discrete mtDNA clades exist ...

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Pleistocene Ice Volumes and Sea-Level Lowering

Cited by 118 publications

References 12 publications

Atlantic Continental Shelf and Slope of the United States - Geologic background

Atlantic Continental Shelf and Slope of the United States - Geologic background

Greenhouse effect and sea level rise: The cost of holding back the sea

Congruence and Conflict Between Molecular and Reproductive Characters When Assessing Biological Diversity in the Western Fanshell Cyprogenia aberti (Bivalvia, Unionidae)¹

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Pleistocene Ice Volumes and Sea-Level Lowering

Cited by 118 publications

References 12 publications

Atlantic Continental Shelf and Slope of the United States - Geologic background

Atlantic Continental Shelf and Slope of the United States - Geologic background

Greenhouse effect and sea level rise: The cost of holding back the sea

Congruence and Conflict Between Molecular and Reproductive Characters When Assessing Biological Diversity in the Western Fanshell Cyprogenia aberti (Bivalvia, Unionidae)1

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Congruence and Conflict Between Molecular and Reproductive Characters When Assessing Biological Diversity in the Western Fanshell Cyprogenia aberti (Bivalvia, Unionidae)¹