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Harmful benthic microalgae blooms represent an emergent phenomenon in temperate zones, causing health, ecological and economic concern. The main goal of this work was to compile records of Ostreopsis at large temporal and spatial scales, in order to study the relationship between cell abundances, the periodicity and intensity of the blooms and the role of(More)
Biotic indices, which reflect the quality of the environment, are widely used in the marine realm. Sometimes, key species or ecosystem engineers are selected for this purpose. This is the case of the Mediterranean seagrass Posidonia oceanica, widely used as a biological quality element in the context of the European Union Water Framework Directive (WFD).(More)
Posidonia oceanica is a seagrass endemic to the Mediterranean Sea. Most of the primary production of the P. oceanica meadow is not directly consumed by herbivores and plays a role as dead rhizomes and roots, dead leaves and drift epibionts (hereafter necromass). The fate of this necromass is (i) sequestration within the matte, (ii) consumption by(More)
Species of the genus Sargassum are large canopy-forming marine brown algae (engineer species) found worldwide from tropical to cold-temperate latitudes. Among this very diversified genus (335 taxa accepted taxonomically), only 9 species (including the invasive S. muticum) have been reported from the Mediterranean Sea. We have analysed the changes over more(More)
Cystoseira amentacea var. stricta (Sargassaceae) is an endemic alga of the Mediterranean Sea. It grows in the upper sublittoral wave-exposed zone and is submitted to various anthropogenic pressures resulting in population fragmentation. In order to assess the genetic diversity and structure of these populations, we developed eight microsatellite markers and(More)
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