Particle fluxes and ecosystem response on a continental margin: the 1985–1988 Mediterranean ECOMARGE experiment

Monaco, André; Biscaye, Pierre E.; Soyer, Jacques; Pocklington, Roger; Heussner, Serge

doi:10.1016/0278-4343(90)90061-p

Cited by 186 publications

(55 citation statements)

References 56 publications

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“…Generally a strong decrease in ETSA is found at the shelf break, while slightly increasing values are often apparent at about 1500 to 2000 m. This increase is especially clear in the northeast Atlantic zone (Relexans et al 1993a) and in the Makassar Strait (Indonesia; Hermin & Castanier 1991). These results are consistent with the opinion of some authors who have attributed to the rise of the continental margin an important role in transport (and degradation) of particulate organic matter transiting from the continent to the deep ocean (Jahnke et al 1990, Monaco et al 1990.…”

Section: Geographic Distribution Of Surface Sediment Ets Activitysupporting

confidence: 93%

Measurement of the respiratory electron transport system (ETS) activity in marine sediments:state-of-the-art and interpretation. I. Methodology and review of literature data

Jc¹

1996

Mar. Ecol. Prog. Ser.

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Respiration, the biochemical transfer of electrons along respiratory chains, provides energy for maintenance and growth. Measurements of the activity of the respiratory electron transport system (ETS) have been adapted for marine studies since the 1970s. In this paper, the application of ETS activity measurements to marine sediment samples is discussed and a review of literature data is presented. From a technical point of view, extraction efficiency of the respiratory units during homogenization is the main difficulty in applying the method to sediment. It has been recognized that timeand temperature-controlled ultrasonic disruption is the most efficient extractionmethod. The dilution of the homogenate is also of critical importance for efficient recovery of ETS activity. A new, accurate method using microtitration techniques is given for laboratory and shipboard applications. Published data show that ETS activity in marine surface sediments, expressed at 20°C, decreases strongly from coastal zones (mean: 186 1. 11 O2 h-' g-l) to the shelf (38 p1 0, h-' g-l) and to deep sea areas (less than 5 p1

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Section: Geographic Distribution Of Surface Sediment Ets Activitysupporting

confidence: 93%

Measurement of the respiratory electron transport system (ETS) activity in marine sediments:state-of-the-art and interpretation. I. Methodology and review of literature data

Jc¹

1996

Mar. Ecol. Prog. Ser.

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“…6 and 7), as observed previously in the northwest Mediterranean over the same period (e.g. Monaco et al, 1990b;Miquel et al, 1994;Puig and Palanques, 1998). Large organic carbon flux is more likely to be associated with a biogenic-SiO 2 bloom than with a calcium-carbonate bloom (Honjo, 1996).…”

Section: Composition Of Settling Particlessupporting

confidence: 77%

Composition and variability of downward particulate matter fluxes in the Palamós submarine canyon (NW Mediterranean)

Martín

Palanqués

Puig

2006

Journal of Marine Systems

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To study the temporal and spatial variability of downward particle fluxes in the Palamós Submarine Canyon, seven sediment traps were moored inside and in the vicinity of the canyon from March to November 2001. Total mass fluxes, major constituent (organic carbon, opal, calcium carbonate and lithogenics) contents and fluxes, and 210 Pb activity of particulate matter were obtained from two consecutive deployments at intervals of 10 and 12 days respectively. Downward particle fluxes measured at the Palamós Canyon head were 2 to 9 times higher than those measured in other northwestern Mediterranean canyons, and this relation increases drastically at 1200 m depth, where observed particle fluxes are 1 to 2 orders of magnitude higher than those reported in other surrounding canyons at similar depths. The highest near-bottom downward particle fluxes were not recorded in the canyon head but in the mid-canyon axis during late spring/summer, as a result of sediment gravity flows triggered by trawling activities at the canyon rims. In comparison to the adjacent open slope, Palamós Canyon is a prime site for the focusing and across-margin transference of total and organic matter. Off-shelf sediment transport was enhanced during a severe storm in November 2001, when a sharp increase in downward particulate fluxes was observed in the whole canyon both near the bottom and at intermediate waters. Despite the dominance of lithogenic particles all year round, a siliceous bloom affected the whole study area in March-April. An asymmetrical pattern was observed between the north and south canyon walls, with higher mean downward fluxes in the latter case, a fact related to the flow regime inside the canyon. The spatial-temporal distribution of total mass fluxes and major constituents defined two domains in the Palamós Canyon: an "inner" domain (up to 1200 m depth) constricted by the canyon topography and mainly influenced by a lateral transport of particles resuspended from the adjoining shelf and upper slope, and an "outer" domain, where slope dynamics and seasonal trends are more important in determining the composition and amount of downward particulate fluxes.

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“…The trap fluxes also reveal a pronounced increase in biogenic Ba fluxes with depth (Fagel et al, 2000), indicating an important lateral transport of material flux in this region (Antia et al, 1999). Similar observations were made for other continental margins (Monaco et al, 1990;Asper et al, 1992;Etcheber et al, 1996;Blake and Diaz, 1994). This conclusion is confirmed and demonstrated more fully by observation of the lithogenic fluxes (Table 2 and Fig.…”

Section: Total Mass and Lithogenic Fractionsupporting

confidence: 77%

“…According to these authors, most of the biogenic particulate matter is recycled by consumption and oxidation on the shelf. A similar study performed in the Gulf of Lions of the northwestern Mediterranean Sea during the ECOMARGE program (Monaco et al, 1990), indicates that trap fluxes of all biogenic constituents reflect lateral advective input of material from upslope and from the shelf. The concentration of organic compounds in surficial sediments on the slope and rise is 2-3 times higher than that in the shelf sediments.…”

Section: Introductionmentioning

confidence: 65%

The carbon cycle at the ocean margin in the northern Gulf of Biscay

Wollast

Chou

2001

Deep Sea Research Part II: Topical Studies in Oceanography

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Particle fluxes and ecosystem response on a continental margin: the 1985–1988 Mediterranean ECOMARGE experiment

Cited by 186 publications

References 56 publications

Measurement of the respiratory electron transport system (ETS) activity in marine sediments:state-of-the-art and interpretation. I. Methodology and review of literature data

Measurement of the respiratory electron transport system (ETS) activity in marine sediments:state-of-the-art and interpretation. I. Methodology and review of literature data

Composition and variability of downward particulate matter fluxes in the Palamós submarine canyon (NW Mediterranean)

The carbon cycle at the ocean margin in the northern Gulf of Biscay

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