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Title: Resistance of two Mediterranean cold-water coral species to low-pH conditions
Author: Movilla, J.
Gori, Andrea
Calvo, Eva
Orejas, Covadonga
López-Sanz, Á.
Domínguez-Carrió, Carlos
Grinyó, Jordi
Pelejero Bou, Carles
Keywords: Coralls
Canvis climàtics
Ecologia aquàtica
Mediterrània (Mar)
Climatic changes
Aquatic ecology
Mediterranean Sea
Issue Date: 31-Dec-2013
Publisher: MDPI
Abstract: Deep-water ecosystems are characterized by relatively low carbonate concentration values and, due to ocean acidification (OA), these habitats might be among the first to be exposed to undersaturated conditions in the forthcoming years. However, until now, very few studies have been conducted to test how cold-water coral (CWC) species react to such changes in the seawater chemistry. The present work aims to investigate the mid-term effect of decreased pH on calcification of the two branching CWC species most widely distributed in the Mediterranean, Lophelia pertusa and Madrepora oculata. No significant effects were observed in the skeletal growth rate, microdensity and porosity of both species after 6 months of exposure. However, while the calcification rate of M. oculata was similar for all colony fragments, a heterogeneous skeletal growth pattern was observed in L. pertusa, the younger nubbins showing higher growth rates than the older ones. A higher energy demand is expected in these young, fast-growing fragments and, therefore, a reduction in calcification might be noticed earlier during long-term exposure to acidified conditions.
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It is part of: Water, 2013, vol. 6, p. 59-67
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ISSN: 2073-4441
Appears in Collections:Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)

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