Paola Beatriz Reyna

Bio: Paola Beatriz Reyna is an academic researcher from National University of Cordoba. The author has contributed to research in topics: Corbicula fluminea & Benthic zone. The author has an hindex of 5, co-authored 12 publications receiving 53 citations. Previous affiliations of Paola Beatriz Reyna include National Scientific and Technical Research Council.

Targeting clams: Insights into the invasive potential and current and future distribution of Asian clams

Abstract: Bivalves are among the main groups of invasive freshwater species, with the Asian clam genus Corbicula in particular being widely distributed. While global studies have focused on Corbicula fluminea (Muller, 1774), the invasive potential of Corbicula largillierti (Philippi, 1844) and Corbicula fluminalis (Muller, 1774) is still unknown. The spread of invasive species may be intensified by climate change. We estimated and compared environmentally suitable areas for these species under hypothetical climate scenarios, generating global maps of invasion risk. We found large climatically suitable areas for C. largillierti and C. fluminalis (under species distribution models) and that their invasive potential is currently underestimated. The analysis revealed many areas in which changing climate may favour the invasion of Corbicula spp.

Taxonomy, distribution and population structure of invasive Corbiculidae (Mollusca, Bivalvia) in the Suquía River basin, Córdoba, Argentina

Abstract: Invasive species are one of the most significant causes of biodiversity loss and changes in ecosystem services, which underlines the importance of their detection and their study. The Asian clams (Corbiculidae) are invasive organisms that accidentally entered the La Plata River, Argentina, presumably in the 1960s. The objectives of the present study were to identify the corbiculid species and to determine their distribution at several locations along the Suquia River basin, an extended area in central Argentina. In addition, population structure was evaluated monthly during one year, at a site in the city of Cordoba that is characterized by high human influence. The presence of Corbicula fluminea (Muller, 1774) and Corbicula largillierti (Philippi, 1844) in the Suquia River basin is reported for the first time. The former species was found only in a lentic environment (San Roque reservoir), while the latter was also found along the tributary rivers and brooks of the basin. Corbicula largillierti showed variations in average density between the different sites and also in biomass and size classes throughout the study period at the site at Cordoba city. The relative composition of the sediments, flow fluctuation and human pollution may be responsible for the observed differences.

Bivalvia, Veneroidea, Corbiculidae, Corbicula largillierti (Philippi, 1844): New distribution record in the Del Valle Central basin, Catamarca Province, Argentina

Abstract: Fil: Torre, Luciana Consejo Nacional de Investigaciones Cientificas y Tecnicas Centro Cientifico Tecnologico Conicet - Cordoba Instituto de Diversidad y Ecologia Animal Universidad Nacional de Cordoba Facultad de Ciencias Exactas Fisicas y Naturales Instituto de Diversidad y Ecologia Animal; Argentina

Dynamics and Control

Abstract: 1. Control Methodology 2. Dynamical Systems 3. Applications to Social and Environmental Problems

The use of cholinesterase and carboxylesterase activities from Mytilus galloprovincialis in pollution monitoring

Abstract: Acetylcholinesterase (AChE), butyrylcholinesterase (BChE), and carboxylesterase (CbE) activities have been measured in gills and digestive gland of the mussel Mytilus galloprovincialis. AChE activity was predominantly localized in gills, whereas the highest BChE and CbE specific activities were detected in digestive glands. Commonly used pesticides were examined in vitro for their ability to inhibit mussel esterases; the results obtained pointed out the highest sensitivity of mussel CbE to low concentrations of pesticides, but also the higher sensitivity of gill cholinesterases over digestive gland forms. Seasonal variation in the activity of gill esterases was determined monthly in mussels collected from the Ebro Delta, an area where pesticides and biocides are frequently used. As a general trend, elevated cholinesterase activities were detected in winter, possibly indicating little or no exposure to organophosphorous compounds, whereas the lowest cholinesterase activities were reported over the summer period. These changes were related to agricultural activities in the area and are supported by the detection of organophosphorous pesticides in the tissue of M. galloprovincialis.

Non-native mollusks throughout South America: emergent patterns in an understudied continent

Abstract: Non-native species have been introduced at escalating rates during the last decades, mainly due to the dispersion generated by the increasing trade and transport worldwide. Mollusks, the second largest metazoan phylum in terms of species richness, are no exception to this pattern, but, to date, a comprehensive synthesis of non-native mollusk species (NNMS) in South America was not available. For this purpose, an e-discussion group was formed with malacologists and taxonomists from South America, where we exchanged and analyzed bibliography, databases and information about NNMS, providing expert opinion to this assessment. The first list of non-native mollusk species for South America, considering terrestrial, freshwater and marine environments, includes 86 NNMS distributed in 152 ecoregions (terrestrial, freshwater and marine) of the 189 recognized for the South American continent. Information on their native region, vectors, first record for South America and distribution, are also provided. In the analysis of the distribution of the NNMS and the entry points of each species (e.g., ports, cargo and passenger airports, cities) and status of conservation of the ecoregions, four hot spots were recognized: Subtropical-Atlantic, Northern Andes, Central Andes and Southern Andes. This work, thus, sets the baseline on NNMS for South America, a key piece of information regarding the development of policies targeting the management of biological invasions and their socio-ecological impacts.

eDNA for detection of five highly invasive molluscs. A case study in urban rivers from the Iberian Peninsula.

Abstract: Biological invasions are an important threat to biodiversity especially in aquatic ecosystems, and their frequency is generally higher near urban areas. Potentially invasive non-indigenous molluscs were deliberately introduced into European waters for food (Corbicula fluminea) and biocontrol (Melanoides tuberculata), and unintentionally introduced by ballast water (Mytilopsis leucophaeata, Corbicula fluminea), stock contamination (Sinanodonta woodiana), accidental escapes from aquaculture (Sinanodonta woodiana), aquarium trade releases (Melanoides tuberculata) and even attached to aquatic birds (Corbicula fluminea). Three rivers from the Iberian Peninsula were monitored near the three most populated inland cities to evaluate the presence of these invasive molluscs through PCR amplification using taxon-specific primers from eDNA. New primers were designed within 16S rRNA and cytochrome oxidase subunit I genes, tested in silico from BLAST methodology and experimentally in vitro before application in the field. C. fluminea was found in Ebro River (near Zaragoza); M. leucophaeata in Guadalquivir River (near Sevilla). M. tuberculata and S. woodiana were found from enclosed areas (lake and reservoir respectively) upstream, respectively, Zaragoza and Madrid. The new tools are ready to be used in other regions where these species are also invasive.