Pierre-Yves Pascal

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Increased atmospheric CO(2) concentrations are causing greater dissolution of CO(2) into seawater, and are ultimately responsible for today's ongoing ocean acidification. We manipulated seawater acidity by addition of HCl and by increasing CO(2) concentration and observed that two coastal harpacticoid copepods, Amphiascoides atopus and Schizopera knabeni(More)
7 The majority of sediment dweller foraminifera are deposit feeders. They use their 8 pseudopodia to gather sediment with associated algae, organic detritus and bacteria. Uptake of 9 bacteria by foraminifera have been observed but rarely quantified. We measured uptake of 10 bacteria by the common foraminifera Ammonia tepida using 15 N pre-enriched bacteria(More)
11 The fate of benthic bacterial biomass in benthic food webs is a topic of major importance 12 but poorly described. This paper describes an alternative method for evaluation of bacterial 13 grazing rate by meiofauna and macrofauna using bacteria pre-enriched with stable isotopes. 14 Natural bacteria from the sediment of an intertidal mudflat were cultured(More)
The migratory shorebirds of the East Atlantic flyway land in huge numbers during a migratory stopover or wintering on the French Atlantic coast. The Brouage bare mudflat (Marennes-Oléron Bay, NE Atlantic) is one of the major stopover sites in France. The particular structure and function of a food web affects the efficiency of carbon transfer. The structure(More)
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