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| Bachelet, G; Dauvin, Jc. |
| The species composition and spatial distribution of macrofaunal assemblages in intertidal sands of Arcachon Bay, on the southwestern Atlantic coast of France, were investigated through a quantitative sampling of twenty stations representative of the various sandy habitats found in the bay, excluding the exposed beaches. Sampling was done on a single occasion, during the winter of 1988. A total of 150 macrobenthic species (> 1 mm) were collected. The abundance of macrofauna ranged from 89 to 52000 ind.m-2 (with a high dominance of the gastropod Hydrobia ulvae in some sites) and the biomass ranged from 1.3 to 42.5 g.m-2 dry weight. Thirteen additional species (belonging to temporary meiofauna and small macrofauna) were also sampled in the sieving fraction... |
| Tipo: Text |
Palavras-chave: INTERTIDAL MACROZOOBENTHOS; INFAUNAL ASSEMBLAGES; BIOMASS; ARCACHON BAY; ORDINATION. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00100/21133/18753.pdf |
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| Garrigue, C. |
| Two algal communities on unconsolidated sand, dominated by two Caulerpa populations, were studied in the southwestern New Caledonian lagoon. Biomass, growth rates and production were measured at two stations over one year. Biomass and growth rate of Halimeda were estimated monthly by counting the number of new and lost segments on tagged plants and by weighing them. Production was assessed monthly by comparing two successive measurements. The average rates measured were 0.60 s f-1 d-1 (segment frond-1 day-1 ) for Halimeda incrassata and 0. 15 s f-1 d-1 for H. discoidea. Production in terms of organic carbon amounted to 3.79 g m-2 y-1 for H. incrassata and 3.37 g m-2 y-1 for H. discoidea. The production of H. discoidea population is subject to seasonal... |
| Tipo: Text |
Palavras-chave: HALIMEDA; PRODUCTION; PHYTOBENTHOS; NEW-CALEDONIA; BIOMASS. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00102/21277/18886.pdf |
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| Sautour, B; Castel, Jerome. |
| Zooplankton distribution in Marennes-Oleron Bay (France) varies during the year and is essentially determined by seasonal rhythms. The whole set of zooplanktonic taxa can be divided into three groups: the first bearing oceanic affinities; the second with estuarine tendencies; and the third more intermediate. Important water flows inhibit the establishment in a specific zone of an autochthonous community (this community is reduced to such species as Acartia discaudata, Acartia grani and Euterpina acutifrons). Zooplanktonic populations reach their maximum abundances at the end of spring and during summer, particularly during spring tide in the inner neritic zone. The estimation of die grazing pressure of copepods (which are the dominant taxa) is variable... |
| Tipo: Text |
Palavras-chave: MARENNES-OLERON; ZOOPLANKTON; COPEPODS; BIOMASS; GRAZING. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00099/21055/18681.pdf |
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