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Quantification of sediment reworking by the Asiatic clam Corbicula fluminea Müller, 1774

Majdi, Nabil and Bardon, Léa and Gilbert, Franck Quantification of sediment reworking by the Asiatic clam Corbicula fluminea Müller, 1774. (2014) Hydrobiologia, 732 (1). 85-92. ISSN 0018-8158

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Official URL: http://dx.doi.org/10.1007/s10750-014-1849-x

Abstract

Active organisms modify the substratum in which they dwell. This process, called “bioturbation”, affects the way that biogeochemical fluxes are mediated at the substratum–water interface. In the frame of this work, the bioturbation potential of the Asiatic clam Corbicula fluminea was characterized and quantified. We measured the displacement of fluorescent particles by C. fluminea burying in a size-based experimental design in order to explore the effects of body-size on sediment reworking. Our results stress that C. fluminea belongs to the functional group of biodiffusors, and that C. fluminea can be considered as an intermediate sediment reworker. We suggest that bioturbation was mainly induced by the pedal-feeding activity of the clams. Results also showed that, though large clams induced displacement of particles deeper into the sediment, small clams showed the highest net sediment reworking activity. This result was in contrast to the initial hypothesis of biovolume as the main driver for particle displacement by bioturbating organisms. Life-history traits and specific features of pedal-feeding could explain the observed pattern.

Item Type:Article
Additional Information:Thanks to Springer editor. The original PDF of the article can be found at Hydrobiologia website : http://link.springer.com/journal/10750
HAL Id:hal-00987357
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: Franck Gilbert
Deposited On:06 May 2014 06:22

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