GATTUSO , Jean-Pierre

Sea urchins, ecologically important herbivores of shallow subtidal temperate reefs, are considered particularly threatened in a future ocean acidification scenario, since their carbonate structures (skeleton and grazing ap- paratus) are made up of the very soluble high-magnesium calcite, particularly sensitive to a decrease in pH. The...

The study of early life stages such as larval development, settlement, survivorship, and recruit growth iscritical to better understand the resilience and persistence of coral populations. While the deleterious effectsof ocean acidification on calcification and growth on adult corals are well known, the impacts on early lifestages are still...

International audience

Continuous anthropogenic CO2 emissions to the atmosphere and uptake by the oceans will cause a reduction of seawater pH and saturation state (Omega) of CaCO3 minerals from which marine calcifiers build their shells and skeletons. Sea urchins use the most soluble form of calcium carbonate, high-magnesium calcite, to build their skeleton, spines...

Abstract. The ability of coral populations to recover from disturbance depends on larval dispersion and recruitment. While ocean warming and acidification effects on adult corals are well documented, information on early life stages is comparatively scarce. Here, we investigate whether ocean warming and acidification can affect the larval and...

Temperate marine rocky habitats may be alternatively characterized by well vegetated macroalgal assemblages or barren grounds, as a consequence of direct and indirect human impacts (e.g. overfishing) and grazing pressure by herbivorous organisms. In future scenarios of ocean acidification, calcifying organisms are expected to be less...

One of the major features of the coastal zone is that part of its sea floor receives a significant amount of sunlight and can therefore sustain benthic primary production by seagrasses, macroalgae, microphytobenthos and corals. However, the contribution of benthic communities to the primary production of the global coastal ocean is not known,...

Volcanic CO2 vents are ideal sites to study the long-term effects of ocean acidification on long-lived calcified species, such as corals. At the Island of Ischia (Italy), we investigated, both in situand ex situ, whether past exposure to low pH confers physiological tolerance to ocean acidificationin different life stages and affects sexual...

International audience

A dynamic model has been developed to represent biogeochemical variables and processes observed during a bloom of Emiliania huxleyi coccolithophore. This bloom was induced in a mesocosm experiment during which the ecosystem development was followed over a period of 23-days through changes in various biogeochemical parameters such as inorganic...