A5020850052- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Water Quality Monitoring and Analysis
- Algal biology and biofuel production
- Marine and fisheries research
- Oceanographic and Atmospheric Processes
- Marine Bivalve and Aquaculture Studies
- Ocean Acidification Effects and Responses
- Coral and Marine Ecosystems Studies
- Isotope Analysis in Ecology
- Marine and coastal plant biology
- Cephalopods and Marine Biology
- Marine Toxins and Detection Methods
- Microbial Community Ecology and Physiology
- Methane Hydrates and Related Phenomena
- Atmospheric and Environmental Gas Dynamics
- Coastal and Marine Management
- Air Quality Monitoring and Forecasting
- Diatoms and Algae Research
- Protist diversity and phylogeny
National University of Mar del Plata
2011-2024
Consejo Nacional de Investigaciones Científicas y Técnicas
2009-2024
Institute of Marine and Coastal Research
2011-2024
Instituto Nacional de Investigacion y Desarrollo Pesquero
2011-2024
Universidad Nacional del Sur
2023-2024
Centro Científico Tecnológico Mar del Plata
2016-2023
Centro Científico Tecnológico - San Juan
2006-2022
Instituto de Investigacións Mariñas
2021
University of Concepción
2006
University of Warwick
2006
Primary production by marine phytoplankton is one of the largest fluxes carbon on our planet. In past few decades, considerable progress has been made in estimating global primary at high spatial and temporal scales combining situ measurements with remote-sensing observations biomass. One major challenges this approach lies assignment appropriate model parameters that define photosynthetic response to light field. present study, a database photosynthesis versus irradiance (P-I) 20-year...
By using data collected during a continuous circumnavigation of the Southern Hemisphere, we observed clear patterns in population-genetic structure Prochlorococcus , most abundant photosynthetic organism on Earth, between and within three Subtropical Gyres. The same mechanisms that were previously invoked to account for vertical distribution ecotypes at local scales accounted global (horizontal) observed. Basin-scale seasonal variations strength stratification provide basis understanding...
Abstract. The photosynthetic performance of marine phytoplankton varies in response to a variety factors, environmental and taxonomic. One the aims MArine primary Production: model Parameters from Space (MAPPS) project European Agency is assemble global database photosynthesis–irradiance (P-E) parameters range oceanographic regimes as an aid examining basin-scale variability photophysiological use this information improve assignment P-E estimation production using satellite data. MAPPS...
In satellite images of the world ocean Argentine Sea is one areas highest chlorophyll-a (Chl a) concentration. Here we analyze spatial variability in primary production relationship to phytoplankton biomass, and some relevant optical physical characteristics observed during spring 2005. High Chl a concentrations were found frontal areas, mainly at shelf-break (19.0 mg m−3) Grande Bay (28.6 m−3), with lowest values offshore (0.4 m−3). Integrated also varied widely from ∼275 5480 C m−2 d−1....
Sea‐air differences of CO 2 partial pressures (Δ p ) and surface chlorophyll a (chl‐ concentration have been determined during 22 cruises in various seasons for 2000–2006 over the Patagonia Sea shelf break. From spring to autumn, nearshore waters act as source atmospheric , while midshelf slope are sink, leading highly negative areal means sea‐air flux Δ . The reach values −67 μ atm −7 × 10 −3 mol m −2 d −1 respectively, close equilibrium winter. chl‐ negatively correlated, suggesting that...
Sustained global ocean observations are needed to recognise, understand, and manage changes in marine biodiversity, resources habitats, implement wise conservation sustainable development strategies. To meet this need, the Global Ocean Observing System (GOOS), a network of observing systems distributed around world coordinated by Intergovernmental Oceanographic Commission (IOC) has proposed Essential Variables (EOVs) that relevant both scientific broader community, including resource...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 258:19-30 (2003) - doi:10.3354/meps258019 Temperature as indicator of optical properties and community structure marine phytoplankton: implications for remote sensing Heather A. Bouman1,*, Trevor Platt2, Shubha Sathyendranath3, William K. W. Li2, Venetia Stuart3, Cesar Fuentes-Yaco3, Heidi Maass2, Edward P....
Variations in the shapes of action and absorption spectra, physiological parameters phytoplankton [α B , biomass ( )-specific initial slope photosynthesis-irradiance curve; PmB plateau φ m ), maximum quantum yield photosynthesis], were studied. Data collected North Atlantic five biogeochemical provinces for two seasons: fall 1992 spring 1993. Further, some nine independent variables tested their ability to predict parameters, using linear regression analyses. It was found that more variable...
The fluorescence excitation spectrum is sometimes used as a proxy for the action of photosynthesis in phytoplankton. main assumption behind this approximation that shapes absorption and spectra are similar except by photoprotective pigments, which do not contribute to spectrum. In study, we compare three species phytoplankton grown at differentirradiances: two diatoms (Thalassiosira weissflogii Chaetoceros sp.) cyanophyte (Synechococcus sp.). contribution pigments was estimated each...
In October 1988 a bloom of Gyrodinium cf. aureolum was recorded along transect across the continental shelf reaching cell densities 1300 ml−1 and chlorophyll concentrations up to 16 μg 1−1. The restricted nutrient-rich thin surface layer ∼10 m depth at beginning seasonal pycnocline. Hydrological conditions showed particular salinity distribution. phytoplankton community dominated by G. but coexisting flora presented great diversity. UV-absorbing pigments were in community.
Since the article “Primary Production, an Index of Climate Change in Ocean: Satellite-Based Estimates over Two Decades” by Kulk et al [...]
The fluorescence excitation spectrum of live phytoplankton cells represents the portion light absorbed that has been effectively transferred to chlorophyll a photosystem II, whereas by photoprotective pigments will not lead fluorescence. Therefore, in vivo used as proxy for action computations primary production ocean. distribution between photosystems, well variations pathway energy inside photosynthetic membrane, can also influence spectrum. In this study, we investigated contribution...
Abstract. The photosynthetic performance of marine phytoplankton varies in response to a variety factors, environmental and taxonomic. One the aims MArine primary Production: model Parameters from Space (MAPPS) project European Agency is assemble global database photosynthesis-irradiance (P-E) parameters range oceanographic regimes as an aid examining basin-scale variability photophysiological use this information improve assignment P-E estimation production using satellite data. MAPPS...