Biomass and activity of benthic fauna on the fladen ground (northern North Sea)

Wilde, Peter; Berghuis, E.M.; Kok, A.

doi:10.1016/0077-7579(86)90053-0

Cited by 33 publications

(25 citation statements)

References 16 publications

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“…The overall annual consumption of the benthic heterotrophic compartment (61 g C m-2 yr-l) is in good agreement with estimates for other subtidal areas such as the Fladen Ground of the North Sea (50 to 70 g C m-2 yr-l; De Wilde et al 1986) and the continental shelf of New England, USA (48 g C m-' yr-l; Rowe et al 1988). It is considerably higher than the results of De for the Oyster Ground, North Sea (28 g C m-2 yr-') and lower than Baretta & Ruardji's (1988) estimate from the model of the western Wadden Sea (192 g C m-' yr-l) The total heterotrophic benthic biomass of the Pierre Noire fine sand community is 3.28 g C m-2.…”

Section: Discussionsupporting

confidence: 81%

Carbon flows in a subtidal fine sand community from the western English Channel: a simulation analysis

Chardy¹,

Dauvin²

1992

Mar. Ecol. Prog. Ser.

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ABSTRACT. Organic carbon flows through the Plerre Noire fine sand community (Bay of Morlalx, France) are described with a trophodynamic point model. Data collected during several annual cycles are used to calibrate the seasonal vanations of each benthic compartment. Mean annual values of state vanables are correctly simulated. In a first approach, the seasonal variations were simulated using 2 forcing functions: input of energy and temperature Influence. In a second run, spawning and recruitment effects were introduced as regulating factors for the macrobenthic compartments. The result~ng annual carbon budget synthesizes the information w e have on this common type of ecosystem. Phytoplankton production represents the major food supply to the benthlc system a n d the importance of pelagic-benthlc coupllng in this area is confirmed. A large proportion of the carbon input IS consumed by bacteria which is the main trophic source for meiofauna. Melofauna is a n important llnk between the bacteria + detritus and the carnivore level, and cannot be considered as an Independent food web The significance of regulation factors such as spawning and recruitment processes in the dynamics of the macrofauna IS explored.

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Section: Discussionsupporting

confidence: 81%

Carbon flows in a subtidal fine sand community from the western English Channel: a simulation analysis

Chardy¹,

Dauvin²

1992

Mar. Ecol. Prog. Ser.

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“…1n most cases, sediment contains a mixture of aerobic and anaerobic microbial populations and oxygen consumption is the combined result of different biological and chemical processes. Therefore, most authors have not been able to draw useful conclusions from ETSA measurements in sediments , de Wilde et al 1984, 1986, Andersen & Helder 1987 or else have had to elaborate calculations, with the help of oxygen-distribution models, to link ETSA to oxygen consumption (Christensen 1983). In recent years, the method has been somewhat neglected by researchers working on sediments.…”

Section: Introductionmentioning

confidence: 99%

Measurement of the respiratory electron transport system (ETS) activity in marine sediments:state-of-the-art and interpretation. II. Significance of ETS activity data

Jc¹

1996

Mar. Ecol. Prog. Ser.

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The activity of the respiratory electron transport system (ETSA), measured in vitro in conditions of V,,, (i.e. with saturation of electron donors and acceptors), represents the respiratory potential of all communities sampled. From analysis of surface sediments from various oceanic areas, ETSA has been found to be correlated with the biopolymer (protein, carbohydrate, lipid) content which may represent the most labile fraction of the sedimentary organic matter. ETSA results expressed at constant temperature (e.g. 20°C) can be considered as an estimator of biomass, especially of the microbial biomass which contributes, in most cases, the greatest part of the sediment respiratory potential. Original and hterature data reveal discrepancies between laboratory and field experiments, so that results obtained .with cultured species cannot be directly applied to natural environments. A compromise conversion factor [particulate organic carbon (POC) biomass (pg) = ETS (p1 O2 h-') X 14.31 is proposed by the author. At in situ temperature, ETSA may theoretically be converted to respiration (R), which is the actual rate of electron transfer. The R/ETSA ratio used for conversion depends strongly on the availability of food. This ratio decreases from coastal to deep areas but results show that the gradient (from 0.4 in shallow sediments to 0.05 in deep sea areas, on average) is not as steep as previously thought. Due to the lack of accuracy of the R/ETSA ratio, the use of ETSA to calculate sediment community oxygen consumption is not very promising and direct measurements of respiration are preferable. Finally, it is concluded that the most important application of the ETSA measurement in sediments is its use as an estimator of the total microbial biomass.

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“…Shells have been found off the coast of Labrador and Greenland, but these are believed to be of fossil origin (Nicol, 1951;Funder and Weidick, 1991). From these and other references, it appears that the species may be ubiquitous along all temperate and subarctic coasts of the North Atlantic (Winter, 1969;von Oertzen, 1972;De Wilde, et al, 1984;De Wilde, et al, 1986;Brey et al, 1990).…”

Section: Arctica Islandica Reviewmentioning

confidence: 99%

Biological-physical interactions on Georges Bank : plankton transport and population dynamics of the ocean quahog, Arctica islandica

Lewis¹

1997

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Biomass and activity of benthic fauna on the fladen ground (northern North Sea)

Cited by 33 publications

References 16 publications

Carbon flows in a subtidal fine sand community from the western English Channel: a simulation analysis

Carbon flows in a subtidal fine sand community from the western English Channel: a simulation analysis

Measurement of the respiratory electron transport system (ETS) activity in marine sediments:state-of-the-art and interpretation. II. Significance of ETS activity data

Biological-physical interactions on Georges Bank : plankton transport and population dynamics of the ocean quahog, Arctica islandica

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