Objectif The impact of anthropogenic ocean acidification on calcifying organisms is expected to be imminent, particularly in high latitude ecosystems. Coccolithophores are the most abundant calcareous phytoplankton in the ocean and play a key role in the global climate by contributing to the oceanic pumps of organic matter and carbonate. Many laboratory experiments suggest that the increasing CO2 levels in the ocean will produce a transition in dominance from more to less heavily calcified coccolithophores. However, this point remains controversial. The Southern Ocean, contains about 40% of the global inventory of anthropogenic atmospheric CO2 with much of the drawdown occurring in the Sub-Antarctic Zone or SAZ. This large inventory of anthropogenic CO2 together with the relatively small changes in other chemical and physical variables in the surface layer of the SAZ makes this region an ideal setting to examine the response of marine calcifying plankton to increasing anthropogenic CO2 levels in their natural habitat. Indeed, there is evidence that the ongoing ocean acidification in the SAZ is already affecting the calcification of key calcifying plankton such as planktonic foraminifera. Coccolithophores are thought to be the main contributors of the elevated Particulate Inorganic Carbon (PIC) concentrations in the waters of the Subtropical, Subantarctic and Polar Fronts. However, despite the importance of coccolithophores in the subantarctic ecosystems, their composition, abundance, seasonality and calcification response to increasing CO2 levels are poorly characterized. In the proposed Marie Curie project, we will combine the analysis of the coccolithophore assemblages collected by an automatic surface layer sampler, sediment traps and sediment samples from two sectors of the Subantarctic Zone. The water and sediment trap samples represent the late industrial era, while surface sediment and sediment core samples are used as a pre-industrial baseline. Champ scientifique natural scienceschemical sciencesinorganic chemistryinorganic compoundsnatural sciencesbiological sciencesecologyecosystems Programme(s) H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions Main Programme H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility Thème(s) MSCA-IF-2016 - Individual Fellowships Appel à propositions H2020-MSCA-IF-2016 Voir d’autres projets de cet appel Régime de financement MSCA-IF-EF-ST - Standard EF Coordinateur UNIVERSIDAD DE SALAMANCA Contribution nette de l'UE € 158 121,60 Adresse CALLE PATIO DE ESCUELAS 1 37008 Salamanca Espagne Voir sur la carte Région Centro (ES) Castilla y León Salamanca Type d’activité Higher or Secondary Education Establishments Liens Contacter l’organisation Opens in new window Site web Opens in new window Participation aux programmes de R&I de l'UE Opens in new window Réseau de collaboration HORIZON Opens in new window Coût total € 158 121,60
