title: Metabolic responses to highpCO2conditions at a CO2vent site in juveniles of a marine isopod species assemblage.
abstract: We are starting to understand the relationship between metabolic rate responses and species' ability to respond to exposure to highpCO2. However, most of our knowledge has come from investigations of single species. The examination of metabolic responses of closely related species with differing distributions around natural elevated CO2areas may be useful to inform our understanding of their adaptive significance. Furthermore, little is known about the physiological responses of marine invertebrate juveniles to highpCO2, despite the fact they are known to be sensitive to other stressors, often acting as bottlenecks for future species success. We conducted an in situ transplant experiment using juveniles of isopods found living inside and around a highpCO2vent (Ischia, Italy): the CO2'tolerant'Dynamene bifidaand 'sensitive'Cymodoce truncataandDynamene torelliae. This allowed us to test for any generality of the hypothesis thatpCO2sensitive marine invertebrates may be those that experience trade-offs between energy metabolism and cellular homoeostasis under highpCO2conditions. Both sensitive species were able to maintain their energy metabolism under highpCO2conditions, but inC. truncatathis may occur at the expense of [carbonic anhydrase], confirming our hypothesis. By comparison, the tolerantD. bifidaappeared metabolically well adapted to highpCO2, being able to upregulate ATP production without recourse to anaerobiosis. These isopods are important keystone species; however, given they differ in their metabolic responses to futurepCO2, shifts in the structure of the marine ecosystems they inhabit may be expected under future ocean acidification conditions.
authors.affiliation: Marine Biology and Ecology Research Centre, Plymouth University, Drake Circus, Plymouth, PL4 8AA UK ; Department of Marine Sciences, University of Gothenburg, Box 460, 405 30 Göteborg, Sweden.
authors.forename: Lucy M
authors.initials: LM
authors.lastname: Turner
authors.affiliation: Stazione Zoologica Anton Dohrn, Department of Integrative Marine Ecology, Villa Dohrn - Benthic Ecology Centre, 80121 Ischia, Naples Italy.
authors.forename: Elena
authors.initials: E
authors.lastname: Ricevuto
authors.affiliation: Stazione Zoologica Anton Dohrn, Department of Integrative Marine Ecology, Villa Dohrn - Benthic Ecology Centre, 80121 Ischia, Naples Italy.
authors.forename: Alexia
authors.initials: A
authors.lastname: Massa Gallucci
authors.affiliation: Stazione Zoologica Anton Dohrn, Department of Integrative Marine Ecology, Villa Dohrn - Benthic Ecology Centre, 80121 Ischia, Naples Italy.
authors.forename: Maurizio
authors.initials: M
authors.lastname: Lorenti
authors.affiliation: Stazione Zoologica Anton Dohrn, Department of Integrative Marine Ecology, Villa Dohrn - Benthic Ecology Centre, 80121 Ischia, Naples Italy.
authors.forename: Maria-Cristina
authors.initials: MC
authors.lastname: Gambi
authors.affiliation: Marine Biology and Ecology Research Centre, Plymouth University, Drake Circus, Plymouth, PL4 8AA UK ; Département de Biologie, Chimie et Géographie, Université du Québec à Rimouski, Rimouski, QC G5L 3A1 Canada.
authors.forename: Piero
authors.initials: P
authors.lastname: Calosi