![]() El objetivo del proyecto es evaluar el impacto de la AO (total alcalinity, dissolved inorganic carbon, pH and partial carbon dioxide pressure) at the ‘Permanent Station for Environmental Studies (EPEA)’, a coastal station located 50 km off the coast of Mar del Plata. Ocean acidification driven by increased concentrations of anthropogenic CO 2 affects ocean ecosystem services, and damages the physiology of phytoplankton and of other organisms in higher trophic levels (e.g., bivalves), which in turn impacts fishing species. Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Instituto de Investigaciones Marinas y Costeras (IIMYC), Mar del Plata. Stakeholders are classified as those who 1) affect the ecosystem services 2) are directly affected by the variation in ES, or 3) are managing the relationship between ES and human use.Īnalysis of the carbonate system in the context of ocean acidification in the EPEA time series (Argentine Sea) Literature studies on the economics of fisheries and on ocean governance. The natural science part aims at developing methodologies for interdisciplinary analysis, but the socio-economical team was only established in 2015, and is now developing questions on the socioeconomic effects of phytoplankton ecosystem services, how decision-makers perceive these links, and how they react. ![]() The fishery resources in the Bight, therefore, appear to be food-limited. At a mean primary production of 188 g C/m 2/yr, the fish yield was 30-60 times larger than the FAO reported catch from 1991-2000 (0.08 MT). Potential fish productivity in the South Brazil Bight was calculated using satellite estimates of primary production and an idealized food chain of 2.8 links with a mean trophic efficiency of 10%. That makes additional ground truthing essential to reconcile modeled chlorophyll profiles with observations. Regional model testing for net primary productivity shows that data are too limited to constrain model parameters. ![]() Phytoplankton, zooplankton, detritus, C, O 2 and main nutrients (N, P, Si, Fe) were modeled assuming a constant Redfield ratio and phytoplankton growth limitation by nutrient availability. Large scale and regional physical ocean models were coupled with bio-geochemical models for the 40-year period of 1968-2007, initialized with in situ historical data. On Argentine samples, ocean acidification (the carbonate system) is also being studied. The team has begun to acquire results from 40 sampling cruises funded from non-IAI sources, that collected chlorophyll A, phaeopigment, nutrients, phytoplankton taxonomy, and pigment composition to investigate the state and trend of changes in phytoplankton populations and ocean environment. For further information see the project website, project papers or contact the investigators directly. This is a summary of the most salient project results.
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