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GEOREF RECORD

Life history, environment and extinction of the scallop Carolinapecten eboreus (conrad) in the Plio-Pleistocene of the U.S. eastern seaboard

Andrew L. A. Johnson, Annemarie M. Valentine, Melanie J. Leng, Bernd R. Schone and Hilary J. Sloane
Life history, environment and extinction of the scallop Carolinapecten eboreus (conrad) in the Plio-Pleistocene of the U.S. eastern seaboard
Palaios (February 2019) 34 (2): 49-70

Abstract

Plio-Pleistocene mass extinction of marine bivalves on the U.S. eastern seaboard has been attributed to declines in temperature and primary production. We investigate the relationship of growth rate in the scallop Carolinapecten eboreus to variation in these parameters to determine which contributed to its extinction. We use ontogenetic profiles of shell delta (super 18) O to estimate growth rate and seasonal temperature, microgrowth-increment data to validate delta (super 18) O-based figures for growth rate, and shell delta (super 13) C to supplement assemblage evidence of production. Post-larval growth started in the spring/summer in individuals from the Middle Atlantic Coastal Plain but in the autumn/winter in some from the Gulf Coastal Plain. Growth rate typically declined with age and was usually higher in summer than winter. Many individuals died in winter but the largest forms typically died in spring, possibly on spawning for the first time. No individuals lived longer than two years and some grew exceedingly fast overall, up to 60% more rapidly than any other scallop species (<145.7 mm in a year). Faster growth was generally achieved by secreting more rather than larger microgrowth increments. Some very fast-growing individuals lived in settings of high production and low temperature. No individuals grew slowly under high production whereas most if not all grew slowly under 'average' production and low temperature. In that the rapid growth evidently enabled by high production would have afforded protection from predators, Plio-Pleistocene decline in production was probably contributory to the extinction of C. eboreus. However, the negative impact of low temperature on growth under 'average' production suggests that temperature decline played some part.


ISSN: 0883-1351
Serial Title: Palaios
Serial Volume: 34
Serial Issue: 2
Title: Life history, environment and extinction of the scallop Carolinapecten eboreus (conrad) in the Plio-Pleistocene of the U.S. eastern seaboard
Affiliation: University of Derby, School of Environmental Science, Derby, United Kingdom
Pages: 49-70
Published: 201902
Text Language: English
Publisher: Society for Sedimentary Geology, Tulsa, OK, United States
References: 130
Accession Number: 2019-014741
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sketch maps, 1 plate, 3 tables, chart
Secondary Affiliation: British Geological Survey, GBR, United KingdomUniversity of Mainz, DEU, Germany
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2020, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by SEPM (Society for Sedimentary Geology), Tulsa, OK, United States
Update Code: 201910
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