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| Dinet, A; Grassle, F; Tunnicliffe, V. |
| The main characteristics of the meiofauna collected at three hydrothermal sites of the East Pacific Rise and Explorer Ridge are presented. Few differences are observed among the populations of the different areas, which are basically composed of nematodes, siphonostomes, poecilostomes and harpacticoid copepods, ostracods and macrofaunal juveniles (polychaetes and limpets). The Guaymas Basin meiofauna is patchily distributed and species composition varies according to the pattern of flux of hydrothermal fluid through the soft sediments. Measurements of the physico-chemical variability on the vent waters encountered of Explorer Ridge illustrate that very few meiofaunal species are adapted to H sub(2)S-rich and hot environments. |
| Tipo: Text |
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| Ano: 1988 |
URL: http://archimer.ifremer.fr/doc/00267/37821/35902.pdf |
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| Galeron, Joelle; Sibuet, Myriam; Mahaut, Ml; Dinet, A. |
| Three major size classes of the benthic metazoan communities (megafauna, macrofauna and meiofauna) were investigated simultaneously at 3 sites in the tropical Northeast Atlantic. The sites varied in their level of surface primary productivity (eutrophic, mesotrophic and oligotrophic). Results for 3 cruises in 3 seasons (Eumeli 2, winter 1991; Eumeli 3, autumn 1991; Eumeli 4, spring 1992) are given for each size class in terms of taxonomic composition, density and biomass. The benthic communities did not exhibit evidence of seasonal variation, but there were substantial differences in the quantitative structure of the metazoan communities between the 3 sites. Total metazoan density and biomass, as well as density and biomass of each size class, decreased... |
| Tipo: Text |
Palavras-chave: Deep sea; Tropical Atlantic; Meiofauna; Macrofauna; Megafauna; Taxonomic composition; Density; Biomass; Environmental conditions. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00000/10519/7602.pdf |
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| Gremare, A; Medernach, L; Debovee, F; Amouroux, Jm; Charles, F; Dinet, A; Vetion, G; Albert, P; Colomines, Jc. |
| The abilities of several biochemical characteristics of sedimentary organic matter to describe quantitative changes in benthic fauna were assessed based on several surveys carried out within the Gulf of Lion during the last decade. Two sets of high frequency samplings were carried out both inshore and offshore, together with an assessment of seasonal variability along a depth gradient, and a synoptic assessment of mesoscale spatial variability. The considered biochemical parameters were: total organic matter, organic carbon, nitrogen, total proteins, available proteins, carbohydrates, lipids, total and available amino acids. The considered faunal parameters were the abundance and the biomass of both meio- and macrofauna. Our results contribute to unravel... |
| Tipo: Text |
Palavras-chave: Matière organique sédimentée; Benthos; Golfe du Lion; Acides aminés; Biodisponibilité; Sedimentary organics; Benthos; Gulf of Lion; Amino acids; Bioavailability. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00321/43264/42995.pdf |
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| Gremare, A; Amouroux, Jm; Cauwet, G; Charles, F; Courties, C; De Bovee, F; Dinet, A; Devenon, Jean-luc; Durrieu De Madron, X; Ferre, B; Fraunie, P; Joux, F; Lantoine, F; Lebaron, P; Naudin, Jj; Palanques, A; Pujo-pay, M; Zudaire, L. |
| A survey involving both permanent mooring and high frequency sampling was carried in the Bay of Banyuls-sur-Mer during the fall of 1999 to assess the effect of strong and unpredictable meteorological events on the functioning of a coastal Mediterranean ecosystem. A severe winter storm took place on 12 November, which generated waves with a significant height of 7 m and a sea surface rise of about 0.5 m. The near-bottom current speed at 24 m reached 30 cm s(-1). This storm induced a significant increase in total suspended matter through resuspension and then a subsequent increase in gross sedimentation rates. It also resulted in an increase of the proportion of refractory particulate organic matter in the water column. It also tended to increase nutrient... |
| Tipo: Text |
Palavras-chave: Impact à une tempête; Méditerranée nord-occidentale; Ecosystème côtier; Impact of storm; NW Mediterranean Sea; Coastal ecosystem. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00321/43265/42996.pdf |
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