The functional group approach to bioturbation: II. The effects of the Macoma balthica community on fluxes of nutrients and dissolved organic carbon across the sediment–water interface

Michaud, Emma; Desrosiers, Gaston; Mermillod‐Blondin, Florian; Sundby, Bjørn; Stora, Georges

doi:10.1016/j.jembe.2006.06.025

Cited by 165 publications

(120 citation statements)

References 49 publications

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“…Such temporal variability is rather common in manipulative experimental studies (e.g. Tuominen et al 1999, Michaud et al 2006). For example, Michaud et al (2005) noted significantly different oxygen uptake rates 20 and 28 d after the addition of the polychaete Nereis virens to experimental sediment microcosms.…”

Section: Discussionmentioning

confidence: 99%

Nutrient fluxes from reduced Baltic Sea sediment: effects of oxygenation and macrobenthos

Ekeroth¹,

Blomqvist²,

Hall³

2016

Mar. Ecol. Prog. Ser.

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Effects of bottom water oxygenation and macrofaunal colonisation on benthic fluxes of nitrogen (N), phosphorus (P) and silicon (Si) from long-term anoxic Baltic Sea bottom sediment were investigated. Sediment boxcosms from an anoxic site at 150 m depth in the open Baltic proper were incubated in the laboratory to follow the development of benthic nutrient fluxes during 74 d exposure to flow-through of oxygen-rich water. In contrast to traditional end-point experimental designs, our repeated measurement approach allowed for separation of transient and long-term effects of oxygenation and bioturbation on benthic nutrient recycling. The composition, but not the rate, of the benthic total dissolved N efflux changed by oxygenation from being dominated by NH 4 in situ to being mostly composed of NO 2 + NO 3 and dissolved organic N (DON) under oxic conditions. Oxygenation in the boxcosms decreased the benthic efflux of dissolved silicate (DSi) and essentially shut off the in situ flux of dissolved inorganic phosphorus (DIP). After 20 d of oxygenation, 2 bottom macrofauna taxa, the polychaete Marenzelleria spp. and the amphipod Monoporiea affinis, were introduced to a subset of the boxcosms. Bioturbation by either taxa increased the efflux of dissolved inorganic N (DIN), DON and DSi to the overlying water. The Prich benthic flux under in situ anoxic conditions roughly approached Redfield N:P stoichiometry after oxygenation in the sediment boxcosms. Upon addition of macrofauna, bioturbation generated even higher N:P flux ratios.

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Section: Discussionmentioning

confidence: 99%

Nutrient fluxes from reduced Baltic Sea sediment: effects of oxygenation and macrobenthos

Ekeroth¹,

Blomqvist²,

Hall³

2016

Mar. Ecol. Prog. Ser.

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“…Among mollusks, bivalves usually dominate the macrofauna biomass on sheltered beaches (McLachlan and Brown 2006), affecting the vertical distribution and stability of the sediments (Hall 1994), the nutrient fluxes from the sediment to the water column (Michaud et al 2006), and the oxygen availability (Michaud et al 2005) by means of their burrowing habit.…”

Section: Introductionmentioning

confidence: 99%

Population dynamics of two suspension-feeding bivalves on a sheltered beach in southeastern Brazil

Mattos

Cardoso

2011

Helgol Mar Res

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The population biology and secondary production of the bivalves Anomalocardia brasiliana (Gmelin, 1791) and Diplodonta punctata (Say, 1822) were studied on a sheltered beach on the southeast coast of Brazil (1) A. brasiliana occupied mainly the upper levels, whereas D. punctata occupied the lower level of the beach; (2) total abundance, growth rate, and production were higher for A. brasiliana; and (3) mortality and turnover rate were higher for D. punctata. The differences in growth, mortality, and production parameters may be associated with a difference in the species' abilities to exploit resources.

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“…However, there are few works that demonstrate the important role of infauna (e.g. Hediste) on fluxes of nutrients (nitrification/denitrification) and dissolved organic carbon across the sediment-water interface (Gilbert et al, 1998;Mermillod-Blondin et al, 2004;Michaud et al, 2005Michaud et al, , 2006. According to the literature, the gallery-diffusers (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…The fauna burrows usually have significant effects on chemical fluxes and microbial activity. As H. diversicolor burrows deeper into the sediment, it irrigates a great volume of sediment, having a great influence on pore water chemistry, ammonium release and active bacteria (Mermillod-Blondin et al, 2004;Michaud et al, 2006). Since the ventilation of burrows by Hediste sp.…”

Section: Discussionmentioning

confidence: 99%

Influence of bioturbation by Hediste diversicolor on mercury fluxes from estuarine sediments: A mesocosms laboratory experiment

Cardoso

Lillebø

Lopes

et al. 2008

Marine Pollution Bulletin

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Mercury, with its reactive forms being the most deleterious for the trophic chains, has been identified as a major pollutant in a few confined bodies of the coastal zone. Due to feeding, burrowing, and bioirrigation activities, infauna are known to play a crucial role in the biogeochemical processes of contaminants. The main goal of the present study is to evaluate the effects of Hediste diversicolor bioturbation on mercury fluxes from estuarine sediments in a mesocosms laboratory experiment. Additionally, an attempt was made to establish a relationship between the amount of remobilised mercury to the water column and the degree of contamination of the sediments using a mercury contamination gradient.The present experiment demonstrated that the bioturbation activity caused by the gallery-diffuser H. diversicolor did not influence the remobilisation of mercury (in dissolved reactive forms) from the sediment to the water column. The concentration of dissolved reactive mercury in the water column also did not reflect the degree of contamination in the sediments. The results obtained were in accordance with the sediment characteristics of the Mondego Estuary and Ria de Aveiro (Portugal), since they are very rich in organic matter content, iron/manganese total and hydrous oxides. These physicochemical characteristics of the sediments may partially justify the retention of mercury by these systems, even when they are subjected to bioturbation.In conclusion, sediments with high organic matter content and a high concentration of iron/manganese hydrous oxides allowed for efficient retention of mercury, and the bioturbation process did not seem to affect the system. Another conclusion from this study is that the remobilisation of mercury by bioturbation to the water column is not a fast process, requiring more than 24 h. This study constitutes an important work in the area of the effects of bioturbation on mercury remobilisation. Considering the toxicity of mercury for the biota, it is essential to evaluate the real magnitude of mercury processes occurring in estuarine systems in order to obtain essential information on metal behaviour.

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The functional group approach to bioturbation: II. The effects of the Macoma balthica community on fluxes of nutrients and dissolved organic carbon across the sediment–water interface

Cited by 165 publications

References 49 publications

Nutrient fluxes from reduced Baltic Sea sediment: effects of oxygenation and macrobenthos

Nutrient fluxes from reduced Baltic Sea sediment: effects of oxygenation and macrobenthos

Population dynamics of two suspension-feeding bivalves on a sheltered beach in southeastern Brazil

Influence of bioturbation by Hediste diversicolor on mercury fluxes from estuarine sediments: A mesocosms laboratory experiment

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