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Latitudinal patterns of gastropod drilling predation intensity through time

Subhronil Mondal, Hindolita Chakraborty and Shubhabrata Paul
Latitudinal patterns of gastropod drilling predation intensity through time
Palaios (May 2019) 34 (5): 261-270


Despite an expectation that predation pressure decreases with increasing latitude, studies on latitudinal variation in gastropod drilling predation through space and time have revealed equivocal trends. Here, we study the latitudinal pattern of gastropod drilling predation from the late Early Cretaceous to the Pleistocene based on a new compilation of global data on mollusks mostly from the northern hemisphere. The study finds a mid-latitudinal (i.e., 21-40 degrees ) peak in drilling predation intensity during the Miocene (the only time interval with sufficient data from all latitudinal bins), and a possible mid-latitudinal peak during the Cretaceous. For the Eocene, Pliocene, and Pleistocene the middle-and either the lower or higher latitudinal-bins show the highest drilling intensity, therefore suggesting a much flatter latitudinal gradient in drilling predation pattern; the Paleocene and Oligocene lack sufficient data for statistical comparison. The Miocene mid-latitudinal peak remains almost unchanged when analyses are restricted to certain ecological and taxonomic groups. Different abiotic (e.g., temperature) and biotic factors (e.g., generic abundances of the predatory gastropods) alone cannot explain the observed trend. The area of shallow shelf might have played a positive but statistically insignificant role in determining the observed pattern.

ISSN: 0883-1351
Serial Title: Palaios
Serial Volume: 34
Serial Issue: 5
Title: Latitudinal patterns of gastropod drilling predation intensity through time
Affiliation: University of Calcutta, Department of Geology, Calcutta, India
Pages: 261-270
Published: 201905
Text Language: English
Publisher: Society for Sedimentary Geology, Tulsa, OK, United States
References: 106
Accession Number: 2019-063786
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 5 tables
Secondary Affiliation: Indian Institute of Technology Kharagpur, IND, India
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, 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: 201933
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