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| Macquartmoulin, C; Patriti, G. |
| Increased offshore advection of migratory neritic plankton may occur by the pathway of nearshore submarine canyons. The nocturnal distribution of migratory bentho-hyponeustonic crustacea was investigated in the axis and on both sides of three submarine canyons, over the continental shelf and slope of the northwestern Mediterranean. The three canyons arc frequently exposed to strong northerly and northwesterly winds blowing seaward. A horizontal surface haul and a vertical haul from bottom to surface were successively achieved with an OMORI plankton net over each depth, from the isobath 50 m to more than 1000 m, in the middle of the night. The Mysidacea Anchialina agilis, Haplostylus lobatus, Siriella clausii, Siriella norvegica and Leptomysis gracilis, and... |
| Tipo: Text |
Palavras-chave: PLANKTON; CANYONS; ADVECTION; MYSIDACEA; ISOPODA. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00099/21045/18671.pdf |
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| Iriarte, A; Daneri, G; Garcia, Vmt; Purdie, Da; Crawford, Dw. |
| Rates of plankton community respiration and chlorophyll a levels were measured in water samples collected at several times of the year in the North Sea, and during July in the English Channel. Planktonic community respiration rates ranged from 0.025 to 0.830-mu-mol O2 l-1 h-1. At low and moderate chlorophyll a concentrations (0-5-mu-g l-1) the correlation between algal biomass and community respiration was not significant. However, respiration and chlorophyll a did correlate significantly and positively at chlorophyll a levels in excess of 5-mu-g l-1. This is discussed in terms of the relative contribution to the total community respiration of autotrophs and microheterotrophs. It is argued that at low and moderate chlorophyll a concentrations, the... |
| Tipo: Text |
Palavras-chave: PLANKTON; RESPIRATION; CHLOROPHYLL A; COASTAL WATERS; MICROHETEROTROPHS. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00101/21266/18877.pdf |
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| Miramand, P; Bentley, D; Guary, Jc; Brylinski, Jm. |
| Cd and V were analyzed in planktonic species (zooplankton and diatoms), in flocks and in total seston (suspended materials) collected at eleven stations for seven sampling periods in the eastern area of the bay of Seine. Cd concentrations measured in planktonic species of the bay of Seine are identical to those measured in other oceanic areas, but V concentrations are generally higher. In the conditions of sampling, the role of both planktonic species and flocks in the horizontal fluxes of Cd and V in the bay of Seine appears not to be important (Cd) or negligible (V) compared to non-living materials (tripton). Nevertheless, this study should be continued in periods of diatom blooms. Flocks which present high Cd and V concentration probably have an... |
| Tipo: Text |
Palavras-chave: PLANKTON; CD; V; BAY OF SEINE. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00100/21143/18762.pdf |
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