Variabilité spécifique à l'intérieur des groupes fonctionnels. Étude du remaniement sédimentaire de deux bivalves Veneridae, Ruditapes decussatus et Venerupis aurea

François, Frédérique; Dalègre, Karine; Gilbert, Franck; Stora, Georges

doi:10.1016/s0764-4469(99)80070-5

Cited by 21 publications

(10 citation statements)

References 23 publications

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“…Species of which only one individual was identified in the set of experimental cores (i.e. Marphysa sanguinea and Venerupis aurea), were removed from the independent variables, even though the latter is known to cause significant biodiffusive mixing when measured in monospecific microcosms (Franç ois et al, 1999).…”

Section: Relationship Between Benthic Populations and Bioturbationmentioning

confidence: 99%

Bioturbation in the Venice Lagoon: Rates and relationship to organisms

et al. 2007

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Experiments were carried out during autumn 1998 and spring 1999 at four selected sites in the Venice Lagoon in order to estimate the major bioturbation modes, and for quantitative analysis of the contribution of various taxa to these modes. Fluorescent sediment particles (63–350 μm) were supplied as a tracer pulse input at the sediment surface. Tracer depth profiles obtained after 15 and 20 days were simulated with a diffusion-advection-non-local transport model. This allowed the rates of biodiffusion (Db), bioadvection (W), and RS, a non-local transport coefficient to account for the displacement of sediment by regeneration, to be estimated. A combination of fresh water and marine organisms were responsible for the recorded sediment reworking, which was dominated by both types of non-local transports (conveying and regeneration). Considering all the sampling sites and seasons, Db ranged from 0.87 ± 0.02 to 3.17 ± 0.92 cm2 y−1, W from 0.12 ± 0.09 to 27.41 ± 2.47 cm y−1 and RS from 0.00 ± 0.00 to 5.47 ± 1.09 g cm−2 y−1 (mean ± SE, n = 3). A multiple regression analysis was applied to identify the contribution from individual species to sediment transport types. Biodiffusion resulted from the combined activity of polychaetes such as Spio decoratus and meiobenthic harpacticoïd copepods, while the polychaete Hediste diversicolor was mainly responsible for regeneration. Conveying processes were driven by another polychaete, Capitella capitata. Despite heterogeneity in the benthic community composition, biodiffusion and regeneration rates did not vary significantly between sites or season, with only bioadvection found to be higher in spring than in autumn

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Section: Relationship Between Benthic Populations and Bioturbationmentioning

confidence: 99%

Bioturbation in the Venice Lagoon: Rates and relationship to organisms

et al. 2007

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“…The knowledge about physical factors complicating this scenario is steadily increasing (e.g., Billi et al, 1992;Wilcock, 1998;Pyrce and Ashmore, 2003;MacKinnon et al, 2004;Pearce and Walker, 2005), and mobile animals complicate this scenario even more: they have diverse mechanistic abilities to modify solid surfaces and to increase or decrease the transport of solids, and these animal actions vary in space and time (e.g., Butler, 1995;Statzner et al, 2003b;Butler, 2006). Thus, for a start, quantifications of such action of animals focused on separate singlespecies assessments of mammals (e.g., Butler, 1995;Trimble and Mendel, 1995;Butler, 2006), salmonids and other fish groups (e.g., Flecker, 1996;Montgomery et al, 1996;DeVries, 1997;Rennie and Millar, 2000;Gottesfeld et al, 2004), and many groups of marine invertebrates (e.g., Fager, 1964;Eckman et al, 1981;Meadows et al, 1990;Willows et al, 1998;François et al, 1999;Botto and Iribarne, 2000;Katrak and Bird, 2003;Jackson et al, 2005; see also the review by Murray et al, 2002) or freshwater invertebrates (e.g., McCall and Tevesz, 1982;Statzner et al, 1996;Parkyn et al, 1997;Statzner et al, 1999;2000;MermillodBlondin et al, 2002;Creed and Reed, 2004;Usio and Townsend, 2004;Takao et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Crayfish and fish as bioturbators of streambed sediments: Assessing joint effects of species with different mechanistic abilities

Statzner

Sagnes

2008

Geomorphology

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“…In the present paper, we define a new functional group, the 'gallerydiffusor' group, as distinct from strict biodiffusors, e.g. the amphipod Pontoporeia hoyi (Robbins et al 1979) and the bivalves Ruditapes decussatus and Venerupis aurea (François et al 1999). This group comprises organisms with particulate tracer distribution patterns similar to the diffusion profile, but whose sediment reworking is neither random nor local.…”

Section: Introductionmentioning

confidence: 99%

Functional approach to sediment reworking by gallery-forming macrobenthic organisms: modeling and application with the polychaete Nereis diversicolor

François¹,

Gérino²,

Stora³

et al. 2002

Mar. Ecol. Prog. Ser.

148

118

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A mechanistic model has been developed to characterize and quantify sediment-mixing due to macrobenthic organisms that construct gallery systems. The mixing model is time-and spacedependent and employs ordinary differential equations. It uses (1) biological parameters -the size of the bioturbated zone, rate of biodiffusion and rate of biotransport; (2) physical parametes -output to the water-column coefficient and rate of physical mixing due to local water currents; and (3) biogeochemical parameters -decay rate of the tracer. This gallery-diffusor model is based on a combination of 2 processes: biodiffusion in the sediment layer containing very dense gallery systems, and biotransport in the region of tube bottoms. The performance of this gallery-diffusor model is compared with that of the biodiffusor model classically used to describe mixing of such organisms. Both models are applied to conservative tracer profiles measured in laboratory experiments with the polychaete Nereis diversicolor. Our new model provides mechanisms to describe and explain the tracer-profile shapes observed in sediments. It includes rapid particle transport from the upper layer of the sediment to the tube bottom zone, which is not taken into account with the biodiffusor model but which is of great importance in understanding the processes of organic matter degradation in the sedimentary column. It also makes possible the accurate quantification of the different components of the mixing process of an organism (in this study, the polychaete N. diversicolor). The gallery-diffusor model constitutes 1 of 5 elementary components in a global bioturbation model that allows the study, quantification and prediction of sediment reworking by macrobenthic communities according to their functional group and composition and/or to the specific characteristics of the individual organisms. KEY WORDS: Bioturbation · Nereis diversicolor · Model · Functional groups · MacrobenthosResale or republication not permitted without written consent of the publisher

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Variabilité spécifique à l'intérieur des groupes fonctionnels. Étude du remaniement sédimentaire de deux bivalves Veneridae, Ruditapes decussatus et Venerupis aurea

Cited by 21 publications

References 23 publications

Bioturbation in the Venice Lagoon: Rates and relationship to organisms

Bioturbation in the Venice Lagoon: Rates and relationship to organisms

Crayfish and fish as bioturbators of streambed sediments: Assessing joint effects of species with different mechanistic abilities

Functional approach to sediment reworking by gallery-forming macrobenthic organisms: modeling and application with the polychaete Nereis diversicolor

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