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Effects of temperature on in vitro sediment reworking processes by a gallery biodiffusor, the polychaete Neanthes virens

Ouellette, Daniel and Desrosiers, Gaston and Gagne, Jean-Pierre and Gilbert, Franck and Poggiale, Jean-Christophe and Blier, Pierre U. and Stora, Georges Effects of temperature on in vitro sediment reworking processes by a gallery biodiffusor, the polychaete Neanthes virens. (2004) Marine Ecology Progress Series, vol. 266 . pp. 185-193. ISSN 0171-8630

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Official URL: http://dx.doi.org/10.3354/meps266185

Abstract

Temperature-induced variations in bioturbation could affect sediment mixing processes in the marine benthic environment. In this study, sediment reworking by Neanthes virens (Sars), a widely distributed polychaete in muddy sand communities of northern temperate latitudes, was studied under different temperature conditions representing winter (1°C), spring and fall (6°C), summer(13°C), and tide pool (18°C) temperatures in the lower St. Lawrence Estuary, Québec, Canada. Sediment reworking was quantified using inert fluorescent particles (luminophores) deposited at the sediment surface. Based on the 1-D luminophore distributions obtained after 5 and 30 d, the use of the specific ‘gallery-biodiffusor’ model allowed us to quantify both biodiffusion (Db) and biotransport (Vb) due to the organisms. Our results showed temperature effects on sediment transport. The lowest biotransport and biodiffusion coefficients were measured at 1 and 6°C and did not change with time. The highest biodiffusion occurred at 13°C for both sampling periods. At 18°C, biodiffusion was intermediate while biotransport was maximal. Differences between the 13°C biodiffusive transport and the other temperatures increased with time. Low transport values at 1 and 6°C suggest that a quiescent stage exists for this species at these temperatures, with sediment mixing occurring mostly during burrow construction. On the other hand, sediment mixing resulted from both the burrow construction and maintenance phases at higher temperatures (13 and 18°C).

Item Type:Article
Additional Information:Thanks to Inter Research editor. The definitive version is available at http://www.int-res.com The original PDF of the article can be found at Marine Ecology Progress Series website : http://www.int-res.com/abstracts/meps/v266/p185-193/
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Other partners > Université de la Méditerranée - Aix-Marseille II (FRANCE)
Other partners > Université du Québec à Rimouski - UQAR (CANADA)
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Deposited By: Franck Gilbert

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