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My scientific interest is focused on the functioning of Antarctic marine planktonic food webs. I currently study the effect of climate change on plankton communities and the microplastics pollution in Antarctica.
Marine phytoplankton can utilize different strategies to cope with ocean warming and freshening from glacial melting in polar regions, which are disproportionally impacted by global warming. In the present study, we investigated the individual and combined effects of a 4°C increase in seawater temperature (T⁺) and a 4 psu decrease in salinity (S⁻)...
A profuse literature related to the ecology of the Argentine continental shelf has been produced in the last four decades, documenting its biological richness and high productivity. Distinctive environmental characteristics define particular systems along and across the shelf, which in all cases are inhabited by mammal, bird, fish and cephalopod sp...
Drepanopus forcipatus and Calanus australis are key planktonic copepods on the southern Patagonian shelf. Their feeding and reproductive patterns and population status were investigated during late summer, when environmental conditions may be critical. The presence of food in the gut and food-pellet length were recorded in adult females and the mos...
The copepod community structure, with special emphasis on small-sized species, was studied over the southern Patagonian shelf in late summer 2004, applying the first plankton sampling in the region with a fine-mesh (66 µm) net. The key role of the copepods Drepanopus forcipatus and Calanus australis was confirmed, but also the high abundance and fr...
A strong interest in the southern Patagonian shelf has emerged in recent years, along with the increasing recognition of its high biological productivity. Knowledge of the pelagic food web structure that supports the richness of this system is still developing, but there are indications that mesozooplankton occupy a pivotal position, as consumers o...
Three representative copepods occurring in the southern Patagonian shelf, i.e., Calanus australis, Drepanopus forcipatus and Oithona helgolandica were sampled by the first time with paired nets of 66 and 150 μm mesh size. The stage-specific estimates of abundance of their populations were statistically analyzed to assess differences in the catchabi...
The focus of this study was to measure assimilation efficiencies of natural and provided seston (powdered macroalgae) by a series of experiments performed with one bivalve and two ascidian species. The aim was to reveal insights into the possible response of filter feeders to a food source other than phytoplankton. The mass-specific deposition rat...
A rich benthic filter-feeding community is present at Potter Cove, South Shetland, in spite of some usually unfavorable conditions affecting their feeding ecology, such as low phytoplankton production in summer and high sedimentation rates. However, organic material that could fuel the benthic system, such as macroalgal fragments, was detected in t...
Ascidians are found in all the oceans. The Polar Front is considered a strong barrier, especially for benthic organisms, separating the Southern Ocean from other oceans. Its influence on ascidian species present at the boundary of the Magellan and Antarctic regions along the Scotia Arc and on the species composition at each station is inferred from...
We usually use Formaldehyde to fix phyto and protozooplankton samples to be analyzed through FlowCam. However, this time we will conduct a plastivory experiment in Antarctica, and the samples to be analyzed in FlowCam will contain phytoplankton and also microplastics. Microplastics will be later aswell observed by Raman microscopy, and one requeriment to observations through Raman is not to use formaldehyde. I think that may be ethanol can shrink phytoplankton cells? the objetive is to count the cells.
Hi, I am calculating Taxonomic distinctiness indices in PRIMER v6 and I am having difficultes with the aggregation file. Apparently it is well created but when I perform the analysis the software says "File aggretation is inconsistent" . I have a matrix of 6 columns (levels) and 67 species, and its corresponding matrix .pri with abundances per samples, with the exact same name of species in the first column of the .agg and the species of the .pri file. Somebody knows which could be the problem?
To analyze the biological, oceanographic and biochemistry data from a long-term temporal series sampling, focusing on zooplankton communities, to interpret the impact of climate seasonal and interannual variability on the abundance, biomass, and populations traits of zooplankton.
To provide a baseline understanding of the concentration, distribution and composition of microplastics in nearshore sediments, surface and sub-surface waters, and the effects of microplastics on coastal zooplankton communities of Potter Cove.
The general objective of the present project is the combined study of the effects of the increase of temperature and of the decrease of salinity on zooplanktonic species of the coastal zones of Antarctic regions to understand the impact of the global climatic change on these key organisms and biological processes.