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dc.contributor.authorJohnson, Andrew L. A.
dc.contributor.authorValentine, Annemarie
dc.contributor.authorLeng, Melanie J.
dc.contributor.authorSloane, Hilary J.
dc.contributor.authorSchöne, Bernd R.
dc.contributor.authorSurge, Donna
dc.date.accessioned2017-05-10T13:54:56Z
dc.date.available2017-05-10T13:54:56Z
dc.date.issued2017-04-28
dc.identifier.citationJohnson A, Valentine A, Leng M, Sloane H, Schӧne B & Surge D (2017) 'Anti-predation strategy, growth rate and extinction amongst Pliocene scallops of the US eastern seaboard'. European Geosciences Union, General Assembly (Vienna, Austria, 23-28 April), Geophysical Research Abstracts 19, EGU2017-16494.en
dc.identifier.urihttp://hdl.handle.net/10545/621600
dc.description.abstractPlacopecten, Chesapecten and Carolinapecten are scallop (pectinid bivalve) genera occurring in the Pliocene of the US eastern seaboard. The first, present in the area today, is a smooth, streamlined form, adept at escaping predators by swimming (‘flight’ strategy). The other two, which are extinct, are plicate (‘ribbed’) forms. Plication facilitates a ‘resistance’ strategy towards predators which is benefited by large size and high shell thickness - maximally so if these states are achieved early in life. Oxygen isotope profiles show that early ontogenetic extensional growth in Pliocene Placopecten was at the same moderate rate as in modern Placopecten. By contrast, in Chesapecten it was as fast as in the fastest-growing modern scallop (c. 80 mm/annum), and accompanied by development of an unusually thick shell, while in Carolinapecten it was substantially faster still (<150 mm/annum). Rapid growth in Chesapecten and Carolinapecten was probably enabled by high primary productivity, for which there is evidence from sediment composition and the associated biota. The extinction of Chesapecten and Carolinapecten, and the survival of Placopecten, can be attributed to a decline in primary productivity which prevented a maximally effective ‘resistance’ strategy towards predators but had no deleterious impact on a ‘flight’ strategy.
dc.description.sponsorshipBritish Geological Survey (BUFI S157)en
dc.language.isoenen
dc.publisherEuropean Geosciences Unionen
dc.relation.urlhttp://meetingorganizer.copernicus.org/EGU2017/posters/24431en
dc.relation.urlhttp://www.geophysical-research-abstracts.net/egu2017.htmlen
dc.rights.urihttp://creativecommons.org/publicdomain/zero/1.0/en
dc.subjectSclerochronologyen
dc.subjectGrowth rateen
dc.subjectBivalveen
dc.subjectPlioceneen
dc.subjectExtinctionen
dc.titleAnti-predation strategy, growth rate and extinction amongst Pliocene scallops of the US eastern seaboarden
dc.typeMeetings and Proceedingsen
dc.contributor.departmentUniversity of Derbyen
dc.contributor.departmentUniversity of Loughboroughen
dc.contributor.departmentBritish Geological Surveyen
dc.contributor.departmentUniversity of Mainzen
dc.contributor.departmentUniversity of North Carolinaen
dc.identifier.journalGeophysical Research Abstractsen
refterms.dateFOA2019-02-28T15:45:10Z
html.description.abstractPlacopecten, Chesapecten and Carolinapecten are scallop (pectinid bivalve) genera occurring in the Pliocene of the US eastern seaboard. The first, present in the area today, is a smooth, streamlined form, adept at escaping predators by swimming (‘flight’ strategy). The other two, which are extinct, are plicate (‘ribbed’) forms. Plication facilitates a ‘resistance’ strategy towards predators which is benefited by large size and high shell thickness - maximally so if these states are achieved early in life. Oxygen isotope profiles show that early ontogenetic extensional growth in Pliocene Placopecten was at the same moderate rate as in modern Placopecten. By contrast, in Chesapecten it was as fast as in the fastest-growing modern scallop (c. 80 mm/annum), and accompanied by development of an unusually thick shell, while in Carolinapecten it was substantially faster still (<150 mm/annum). Rapid growth in Chesapecten and Carolinapecten was probably enabled by high primary productivity, for which there is evidence from sediment composition and the associated biota. The extinction of Chesapecten and Carolinapecten, and the survival of Placopecten, can be attributed to a decline in primary productivity which prevented a maximally effective ‘resistance’ strategy towards predators but had no deleterious impact on a ‘flight’ strategy.


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