Benthic macrofauna and sediment reworking quantification in contrasted environments in the Thau Lagoon

Duport, Eric; Gilbert, Franck; Poggiale, Jean-Christophe; Dedieu, Karine; Rabouille, Christophe; Stora, Georges

doi:10.1016/j.ecss.2006.11.018

Cited by 48 publications

(38 citation statements)

References 29 publications

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“…Sediment reworking model-To describe the macrofaunainduced luminophore distribution within the sediment, the mechanistic one-dimensional gallery-diffusion model (François et al 1997(François et al , 2002Duport et al 2007) was used. The model is based on the general diagenetic equation (Berner 1980) and applies two different transport coefficients to quantify the sediment reworking:…”

Section: Methodsmentioning

confidence: 99%

Are similar worms different? A comparative tracer study on bioturbation in the three sibling species Marenzelleria arctia, M. viridis, and M. neglecta from the Baltic Sea

Renz¹,

Förster²

2013

Limnology & Oceanography

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The invasive spionid polychaetes of the genus Marenzelleria spp., consisting of the three sibling species M. neglecta, M. viridis, and M. arctia, has been found in the Baltic Sea since the 1980s. Because of difficulties in species identification, little is known about species-dependent sediment reworking and solute transport. The closely related species are apparently similar in feeding and sediment-dwelling behavior, but size and burrowing depth indicate differences in bioturbation and the biogeochemical consequences thereof. To investigate these potential differences, a tracer experiment with artificial particles (luminophores) and solute tracer (bromide) was conducted. Polychaetes were identified to species level using a molecular genetic key. Modeled results show that all three species display markedly low particle reworking rates with biodiffusion coefficients (Db) of 1.76 cm 2 yr 21 (M. viridis) and 0.07 cm 2 yr 21 (M. neglecta) at an abundance of 1273 individuals m 22 and 0.44 cm 2 yr 21 (M. arctia) at twice that abundance. Nonlocal transport coefficients are negligible in all cases. Solute transport by M. neglecta and M. viridis are more similar to one another than to M. arctia, whose solute transport mode is much more diffusive in character (10.9-fold enhanced diffusivity with nonlocal irrigation coefficients [a] of 55.3 yr 21 ) than that of the two other species, which affect tracer distributions in the sediment predominantly through a nonlocal, advective transport mode (a of 108.9 yr 21 M. viridis and 130.9 yr 21 M. neglecta). Thus, a functional grouping of the sibling species in terms of bioirrigation is not recommended.

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Section: Methodsmentioning

confidence: 99%

Are similar worms different? A comparative tracer study on bioturbation in the three sibling species Marenzelleria arctia, M. viridis, and M. neglecta from the Baltic Sea

Renz¹,

Förster²

2013

Limnology & Oceanography

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“…Gérino et al 1999), community composition (e.g. Duport et al 2007), environmental factors (e.g. Orvain & Sauriau 2002, Reiss & Kröncke 2005, resource availability (e.g.…”

Section: Discussionmentioning

confidence: 99%

Sediment mixed layer as a proxy for benthic ecosystem process and function

Teal¹,

Parker²,

Solan³

2010

Mar. Ecol. Prog. Ser.

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“…This latter station presents a higher seasonal variability, which is probably related to its position near oyster farms. Analyses of macrobenthos (organism density, total biomass, dominant species) and sediment reworking indicated roughly similar organism density and total biomass despite a different macrobenthos community and higher and deeper benthic mixing intensities at Stn C5 ( 210 Pb cross-sectional profiles exhibit a wellpronounced mixed layer of 10 cm depth at Stn C5) (Duport et al 2007, Schmidt et al 2007). Both stations consisted of a classical mixture of muddy sand in sheltered areas and fine sand assemblages.…”

Section: Methodsmentioning

confidence: 99%

Coupling of carbon, nitrogen and oxygen cycles in sediments from a Mediterranean lagoon: a seasonal perspective

Dedieu¹,

Gilbert²,

Soetaert³

et al. 2007

Mar. Ecol. Prog. Ser.

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International audienceExperimental data and simulations were used to investigate the seasonal coupling between carbon, nitrogen and oxygen cycles in marine sediments from a eutrophic shallow lagoon in the Mediterranean Sea area. A negative seasonal correlation was observed between oxygen consumption and coupled nitrification–denitrification rates in surface sediments. Elevated values of oxygen consumption rates were reached during warm periods (up to 87.7 mmol m–2 d–1) whereas nitrification and denitrification rates remained close to the lowest rates reported for coastal sediments (values around 0.021 to 0.35 mmol N m–2 d–1 for nitrification and 0.014 to 0.045 mmol N m–2 d–1 for denitrification). A steady-state diagenetic model closely represented the seasonal negative correlation of oxygen uptake, coupled nitrification–denitrification rates, the vertical distribution patterns of pore water oxygen and the solid phase distribution of organic carbon when nitrification inhibition by sulfide was included. Simulation adjusted to field data also highlighted the importance of oxygen penetration depth in the seasonal variation of nitrification. The modelling indicated that anaerobic metabolism was the most significant pathway (65 to 80%) during organic matter mineralization with a clear seasonal increase during warm periods. These warm periods were also characterized by the higher benthic demand of oxygen mostly used to re-oxidize the by-products from anaerobic reactions (from 57 to 82%), the other part being used for carbon mineralization

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Benthic macrofauna and sediment reworking quantification in contrasted environments in the Thau Lagoon

Cited by 48 publications

References 29 publications

Are similar worms different? A comparative tracer study on bioturbation in the three sibling species Marenzelleria arctia, M. viridis, and M. neglecta from the Baltic Sea

Are similar worms different? A comparative tracer study on bioturbation in the three sibling species Marenzelleria arctia, M. viridis, and M. neglecta from the Baltic Sea

Sediment mixed layer as a proxy for benthic ecosystem process and function

Coupling of carbon, nitrogen and oxygen cycles in sediments from a Mediterranean lagoon: a seasonal perspective

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