1,720,991 research outputs found
Il fitoplancton di due aree di allevamento di molluschi lamellibranchi nello stagno di Santa Gilla (Sardegna Meridionale).
No full textRecherches ecologiques et biologiques (Phytoplancton) dans le lac de Varano (Mer Adriatique). Donnees preliminaires.
No full textDensitè et biomasse du phytoplancton et du picoplancton dans des bassins fertilises en Valle Fosse et Valle Zappa (Lagune de Venise)
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Ciclo Annuale del fitoplancton in una valle da pesca della laguna di Venezia (Val Dogà).
No full textRecherches sur le periphyton a diatomees dans un vivier de la lagune de Venise (Mai 1985-Mai 1986).
No full textContribution a la connaissance du periphyton diatomique des eaux saumatres de la Valle Sparesera (Suite).
No full textDistribution du picoplancton photoautotrophe dans la baie de Terra Nova (Mer de Ross, Antartique) pendant l'été austral 1989-1990
No full textPhytoplancton de la lagune de Venise. II-Bassin Central (Avril 1989-Mars 1990).
No full textTo continue the research on the lagoonal phytoplanktonic communities, we carried out monthly samplings (from April 1989 to March 1990) on four sampling stations, located in the central basin (Malamocco basin) of the Venice lagoon, during the flood and the ebb tide. The same methods were used during the present work and the previous research to compare the results.
Environmental parameters showed the influence of the sea water also in the inner areas. Phytoplankton was influenced by the environment: there were many eupelagic species; the freshwater species, instead, were not abundant. Phytoplankton was constituted by 258 taxa, 75% of them were diatoms. During the summer the phytoplanktonic densities were often higher than 5x105 cells/ml; during the cold season, we registered high density values only in March, due to a bloom of Skeletonema costatum. This diatom was very abundant during the same period also in the Northern and in the Southern basins of the lagoon. Diatoms were present during all the year with fluctuations different among the stations. Microflagellates sometimes were more abundant than diatoms; the other groups, included Dinoflagellates and Euglenophyceans did not show significant density values
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