Annual response of two Mediterranean azooxanthellate temperate corals to low-pH and high-temperature conditions
Autor: | Juan Ignacio Movilla, Àngel López-Sanz, Eva María Calvo, Eduard Serrano, Carles Pelejero, Rafael Coma |
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Rok vydání: | 2016 |
Předmět: |
0106 biological sciences
Mediterranean climate chemistry.chemical_classification Astroides calycularis food.ingredient 010504 meteorology & atmospheric sciences Ecology 010604 marine biology & hydrobiology Coral Ocean acidification Aquatic Science Biology 01 natural sciences Animal science food chemistry Temperate climate Leptopsammia pruvoti Organic matter Seawater Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences |
Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
ISSN: | 1432-1793 0025-3162 |
Popis: | 14 páginas, 4 figuras, 3 tablas. Ocean acidification (OA) and warming related to the anthropogenic increase in atmospheric CO2 have been shown to have detrimental effects on several marine organisms, especially those with calcium carbonate structures such as corals. In this study, we evaluate the response of two Mediterranean shallow-water azooxanthellate corals to the projected pH and seawater temperature (ST) scenarios for the end of this century. The colonial coral Astroides calycularis and the solitary Leptopsammia pruvoti were grown in aquaria over a year under two fixed pH conditions, control (8.05 pHT units) and low (7.72 pHT units), and simulating two annual ST cycles, natural and high (+3 °C). The organic matter (OM), lipid and protein content of the tissue and the skeletal microdensity of A. calycularis were not affected by the stress conditions (low pH, high ST), but the species exhibited a mean 25 % decrease in calcification rate at high-ST conditions at the end of the warm period and a mean 10 % increase in skeletal porosity under the acidified treatment after a full year cycle. Conversely, an absence of effects on calcification and skeletal microdensity of L. pruvoti exposed to low-pH and high-ST treatments contrasted with a significant decrease in the OM, lipid and protein content of the tissue at high-ST conditions and a 13 % mean increase in the skeletal porosity under low-pH conditions following a full year of exposure. This speciesspecific response suggests that different internal self-regulation strategies for energy reallocation may allow certain shallow-water azooxanthellate corals to cope more successfully than others with global environmental changes. This work was supported by projects CTM2012- 32017, CGL2013-43106-R and a FPI fellowship (BES-2007-16537) to JM from the Spanish Government. This is a contribution from the Marine Biogeochemistry and Global Change research group (Grant 2014SGR1029, Generalitat de Catalunya). |
Databáze: | OpenAIRE |
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