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Resistance of Two Mediterranean Cold-Water Coral Species to Low-pH Conditions

AuthorsMovilla, Juan Ignacio ; Gori, Andrea ; Calvo, Eva María ; Orejas, Covadonga ; López-Sanz, Àngel ; Dominguez-Carrió, Carlos ; Grinyó, Jordi ; Pelejero, Carles
Calcification rate
Aquaria experiment
Mediterranean Sea
Madrepora oculata
Ocean acidification
Cold-water corals
Lophelia pertusa
Issue DateJan-2014
PublisherMultidisciplinary Digital Publishing Institute
CitationWater 6(1): 59-67 (2014)
AbstractDeep-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. © 2013 by the authors
Description9 pages, 1 figure, 1 table
Publisher version (URL)http://dx.doi.org/10.3390/w6010059
Identifiersdoi: 10.3390/w6010059
issn: 2073-4441
Appears in Collections:(ICM) Artículos
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