Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

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Record number 401846
Title Oxygen consumption in Mediterranean octocorals under different temperatures
Author(s) Previati, M.; Scinto, A.; Cerrano, C.; Osinga, R.
Source Journal of Experimental Marine Biology and Ecology 390 (2010)1. - ISSN 0022-0981 - p. 39 - 48.
DOI http://dx.doi.org/10.1016/j.jembe.2010.04.025
Department(s) Aquaculture and Fisheries
WIAS
Publication type Refereed Article in a scientific journal
Publication year 2010
Keyword(s) coral corallium-rubrum - benthic suspension feeders - mass mortality event - particulate organic-matter - paramuricea-clavata - eunicella-singularis - climate-change - in-situ - ecological observations - marine invertebrate
Abstract Ecosystem resilience to climate anomalies is related to the physiological plasticity of organisms. To characterize the physiological response of some common Mediterranean gorgonians to fluctuations in temperature, four species (Paramuricea clavata, Eunicella singularis, Eunicella cavolinii and Corallium rubrum) were maintained in aquaria, in which the temperature was increased every ten days with increments of 2–3 °C, starting at 14 °C, ending at 25 °C. Oxygen consumption, number of open/closed polyps and percentage of necrotic tissue were monitored. All species showed similar activity patterns with increasing temperature. P. clavata and E. singularis showed the highest respiration rate at 18 °C, E. cavolinii and C. rubrum at 20 °C. Above these temperatures, both oxygen consumption and polyp reactivity decreased in all species. The present data confirm a reduction of the metabolic activity in Mediterranean gorgonians during periods of high temperature. At temperatures above 18 °C, the percentage of open polyps (considered as a parameter to evaluate polyps reactivity) decreased, thus mirroring the trend of oxygen consumption. The average values of Q10 indicated that gorgonians have a definite temperature limit over which the metabolism (oxygen consumption) stop to follow the temperature increase. After three days at 25 °C, metabolic activity in E. cavolinii, C. rubrum and P. clavata further decreased and the first signs of necrosis were observed. At this temperature, activity remained unchanged in E. singularis. This species seems to more resistant to thermal stress. The symbiotic zooxanthellae present in this species are likely to provide an alternative source of energy when polyps reduce their feeding activity.
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