Vertical distribution and diurnal migration of atlantid heteropods

Wall-Palmer, Deborah and Metcalfe, Brett and Leng, Melanie J and Sloane, Hilary J and Ganssen, Gerald and Vinayachandran, P N and Smart, Christopher W. (2018) Vertical distribution and diurnal migration of atlantid heteropods. In: MARINE ECOLOGY PROGRESS SERIES, 587 . pp. 1-15.

PDF Mar_Eco_Pro_Sci_587_1_2018.pdf - Published Version Restricted to Registered users only Download (3MB) | Request a copy

Abstract

Understanding the vertical distribution and migratory behaviour of shelled holoplanktonic gastropods is essential in determining the environmental conditions to which they are exposed. This is increasingly important in understanding the effects of ocean acidification and climate change. Here we investigated the vertical distribution of atlantid hetero pods by collating data from publications and collections and using the oxygen isotope (delta O-18) composition of single aragonitic shells. Data from publications and collections show 2 patterns of migration behaviour: small species that reside in shallow water at all times, and larger species that make diurnal migrations from the surface at night to deep waters during the daytime. The delta O-18 data show that all species analysed (n = 16) calcify their shells close to the deep chlorophyll maximum. This was within the upper 110 m of the ocean for 15 species, and down to 146 m for a single species. These findings confirm that many atlantid species are exposed to large environmental variations over a diurnal cycle and may already be well adapted to face ocean changes. However, all species analysed rely on aragonite supersaturated waters in the upper < 150 m of the ocean to produce their shells, a region that is projected to undergo the earliest and greatest changes in response to increased anthropogenic CO2.

Item Type:	Journal Article
Publication:	MARINE ECOLOGY PROGRESS SERIES
Publisher:	INTER-RESEARCH, NORDBUNTE 23, D-21385 OLDENDORF LUHE, GERMANY
Additional Information:	Copy right for the article belong to INTER-RESEARCH, NORDBUNTE 23, D-21385 OLDENDORF LUHE, GERMANY
Department/Centre:	Division of Mechanical Sciences > Divecha Centre for Climate Change
Date Deposited:	27 Mar 2018 18:27
Last Modified:	27 Mar 2018 18:27
URI:	http://eprints.iisc.ac.in/id/eprint/59399

Actions (login required)

View Item