Variation in size of living articulated brachiopods with latitude and depth

Peck, L.. S. and Harper, E. M. (2010) Variation in size of living articulated brachiopods with latitude and depth. Marine Biology, 157 (10). pp. 2205-2213. ISSN 0025-3162 (Print) 1432-1793 (Online) DOI 10.1007/s00227-010-1486-5

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Abstract

Geographical variations in animal characters are one of the main subjects for study in macroecology. Variation with latitude has received special interest. Articulated brachiopods are possibly the commonest macrofossil with large variations in size of taxa through the fossil record. Here, we investigate trends in size of the 3 main orders of articulated brachiopod with latitude and depth. Data were insufficient to identify patterns in Thecideida (a micromorph taxon only recorded from low latitudes). Rhynchonellida had no clear trends in size with latitude or depth. Terebratulida exhibited hemispheric differences in size relations, with increasing length of species towards the pole in the south and no significant trend in the north. Tropical species were small (<20 mm length between 10°N and 10°S), and the largest species were found between 30° and 60° latitude in both hemispheres. There were no articulated brachiopods recorded from the high arctic, and support for a continuous trend in size with latitude was small or absent. In Terebratulida, there was a significant decrease in species length with depth of 1.7 mm per 100 m depth increase. These trends could be explained by competition for space and reduced availability of habitat with progressive depth beyond the continental shelf.

Item Type: Article
Uncontrolled Keywords: 2010AREP; IA60;
Subjects: 04 - Palaeobiology
Divisions: 04 - Palaeobiology
Journal or Publication Title: Marine Biology
Volume: 157
Page Range: pp. 2205-2213
Identification Number: 10.1007/s00227-010-1486-5
Depositing User: Sarah Humbert
Date Deposited: 28 May 2010 15:47
Last Modified: 23 Jul 2013 09:57
URI: http://eprints.esc.cam.ac.uk/id/eprint/1403

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