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Differential sensitivity of larvae to ocean acidification in two interacting mollusc species

Journal article
Authors C. Campanati
Samuel Dupont
G. A. Williams
V. Thiyagarajan
Published in Marine Environmental Research
Volume 141
Pages 66-74
ISSN 0141-1136
Publication year 2018
Published at The Sven Lovén Centre for Marine Sciences
Department of Biological and Environmental Sciences
Pages 66-74
Language en
Links dx.doi.org/10.1016/j.marenvres.2018...
Keywords Saccostrea cucullatn, Reishia clavigera, Larvae, Ocean acidification, Predator, Prey, oysters crassostrea-virginica, marine invertebrate larvae, predator-prey, interactions, mixed-effects models, early-life stages, climate-change, saccostrea-glomerata, calcifying organisms, keystone predation, elevated, pco(2), Environmental Sciences & Ecology, Marine & Freshwater Biology, Toxicology
Subject categories Marine ecology

Abstract

Anthropogenically-induced ocean acidification (OA) scenarios of decreased pH and altered carbonate chemistry are threatening the fitness of coastal species and hence near-shore ecosystems' biodiversity. Differential tolerances to OA between species at different trophic levels, for example, may alter species interactions and impact community stability. Here we evaluate the effect of OA on the larval stages of the rock oyster, Saccostrea cucullata, a dominant Indo-Pacific ecosystem engineer, and its key predator, the whelk, Reishia clavigera. pH as low as 7.4 had no significant effect on mortality, abnormality or growth of oyster larvae, whereas whelk larvae exposed to pH 7.4 experienced increased mortality (up to similar to 30%), abnormalities (up to 60%) and similar to 3 times higher metabolic rates compared to controls. Although these impacts' long-term consequences are yet to be investigated, greater vulnerability of whelk larvae to OA could impact predation rates on intertidal rocky shores, and have implications for subsequent community dynamics.

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