GRADIENTS OF PHYTOPLANKTON ABUNDANCE, COMPOSITION AND PHOTOSYNTHETIC PIGMENTS ACROSS THE ALMERIA-ORAN FRONT (SW MEDITERRANEAN-SEA) - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue Journal of Marine Systems Année : 1994

GRADIENTS OF PHYTOPLANKTON ABUNDANCE, COMPOSITION AND PHOTOSYNTHETIC PIGMENTS ACROSS THE ALMERIA-ORAN FRONT (SW MEDITERRANEAN-SEA)

Résumé

As a part of the interdisciplinary study of the geostrophic front of the eastern Alboran Sea (''Almofront-1'', April-May 1991), several characteristics of phytoplankton biomass have been measured at the regional scale to evaluate the gradients between the frontal jet and the surrounding water masses. Microplanktonic diatoms, chlorophyll a and fucoxanthin were the most abundant in the front by 1-2 orders of magnitude whereas pico- and nanoplankton, which consist mostly of prymnesiophytes, and 19'hexanoyloxufucoxanthin tended to be the most abundant in the adjacent waters. Correlations between the various phytoplankton components and tracers are examined. The Almeria-Oran front behaves typically as a fertilisation site in an otherwise oligotrophic environment. Frontal fertilisation favored the growth of one or a few opportunistic, autochthonous diatom species, the remainder of the Alboran Sea being occupied by a diversified population of the smallest size-classes of phytoplankton.

Domaines

Océanographie

Dates et versions

hal-03504899 , version 1 (30-12-2021)

Identifiants

Citer

M Fiala, A Sournia, Hervé Claustre, Jc Marty, L Prieur, et al.. GRADIENTS OF PHYTOPLANKTON ABUNDANCE, COMPOSITION AND PHOTOSYNTHETIC PIGMENTS ACROSS THE ALMERIA-ORAN FRONT (SW MEDITERRANEAN-SEA). Journal of Marine Systems, 1994, 5 (3-5), pp.223-233. ⟨10.1016/0924-7963(94)90048-5⟩. ⟨hal-03504899⟩
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