Digestion in sea urchin larvae impaired under ocean acidification

Stumpp, Meike, Hu, Marian Yong-An, Casties, Isabel, Saborowski, Reinhard, Bleich, Markus, Melzner, Frank and Dupont, Sam (2013) Digestion in sea urchin larvae impaired under ocean acidification Nature Climate Change, 3 (12). pp. 1044-1049. DOI 10.1038/nclimate2028.

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Abstract

Larval stages are considered as the weakest link when a species is exposed to challenging environmental changes1, 2. Reduced rates of growth and development in larval stages of calcifying invertebrates in response to ocean acidification might be caused by energetic limitations3. So far no information exists on how ocean acidification affects digestive processes in marine larval stages. Here we reveal alkaline (~pH 9.5) conditions in the stomach of sea urchin larvae. Larvae exposed to decreased seawater pH suffer from a drop in gastric pH, which directly translates into decreased digestive efficiencies and triggers compensatory feeding. These results suggest that larval digestion represents a critical process in the context of ocean acidification, which has been overlooked so far.

Document Type: Article
Funder compliance: info:eu-repo/grantAgreement/EC/FP7/265847
Additional Information: WOS:000330126300017
Keywords: ocean acidification
Research affiliation: OceanRep > The Future Ocean - Cluster of Excellence
OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-B Experimental Ecology - Benthic Ecology
Kiel University > Faculty of Medicine > Institute of Physiology
Refereed: Yes
DOI etc.: 10.1038/nclimate2028
ISSN: 1758-678X
Projects: BIOACID, Future Ocean, ECO2
Date Deposited: 06 Dec 2013 09:53
Last Modified: 12 Jan 2015 12:17
URI: http://oceanrep.geomar.de/id/eprint/22542

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