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Tombari, Andrea D. - One of the best experts on this subject based on the ideXlab platform.
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Diversidad de vertebrados acuáticos de tres humedales urbanos de la ciudad de Buenos Aires
Instituto de Limnología "Raúl A. Ringuelet" Facultad de Ciencias Naturales y Museo (UNLP), 2019Co-Authors: Llamazares Vegh Sabina, Villatarco Vázquez Paola, Kunert, María Cecilia, Tombari, Andrea D.Abstract:The urban wetlands are sites of high biodiversity that are under a great anthropogenic pressure. In the city of Buenos Aires, one of the more important areas of recreation is constituted by Parque Tres de Febrero (well-known as like “Bosques de Palermo”), that conforms a Green Zone of 25 ha. In this area there are artificial wetlands of diverse physical characteristics. In the present work, the goal is to determine vertebrate’s diversity in these urban aquatic enviroments in order to evaluate the degree of impact of the recreational activity on the conservation of the vertebrates associated to the water bodies. The study was carried out in three artificial lagoons included in the park: Regatas, Rosedal and Planetario. Altogether, seventeen species of fish (Prochilodus lineatus, Oligosarcus jenynsii, Cheirodon interruptus, Bryconamericus iheringii, Hoplias malabaricus, Hypostomus commersoni, Rhamdia quelen, Pimelodus albicans, Pimelodus maculatus, Cyprinus carpio, Cnesterodon decemmaculatus, Gambusia affinis, Jenynsia multidentata, Synbranchus marmoratus, Australoheros facetus, Gymnogeophagus meridionalis and Crenicichla scottii), eighteen species of birds (Podiceps rolland, Podilymbus podiceps, Podiceps major, Phalacrocorax olivaceus, Ardea alba, Egretta thula, Butorides striatus, Nycticorax nycticorax, Anas georgica, Anas platyrhynchos, Anas platyrhynchos domesticus, Anser anser, Cairina moschata, Netta peposaca, Aramus guarauna, Fulica armillata, Fulica leucoptera and Chloroceyle amazona), three species of turtles (Phrynops hilarii, Trachemys scripta elegans and Trachemys venusta) and one species of mammal were registered (Myocastor coipo). Among these species, eight are introduced: two fishes (Cyprinus carpio and Gambusia affinis), two turtles (Trachemys scripta elegans and Trachemys venusta) and four birds (Anas platyrhynchos, Anas platyrhynchos domesticus, Anser anser and Cairina moschata). Regatas was the site with greater diversity of fishes (n=17) that represents a 10.43% of Río de la Plata’s ichthyofauna (n=163). This site lodges a 13% of the bird species associated to registered water bodies in the City of Buenos Aires (n=107). When comparing the specific richness among lagoons, we found high similarity between Regatas and Planetarium. Also, both sites presented the greatest specific richness of fish during the months of January and February. From this preliminary study it was possible to describe and to differentiate each lagoon by its fauna and physical characteristics, and also it constitutes the base to continue with further studies of communities which allow the development of the necessary guidelines of handling for the protection of Lagos Tres de Febrero.Los humedales urbanos son sitios de alta biodiversidad que se encuentran bajo una gran presión antropogénica. En la ciudad de Buenos Aires, una de las áreas de recreación más importantes está constituida por el Parque Tres de Febrero (conocido como "Bosques de Palermo"), que conforma una zona verde de 25 hectáreas. En esta zona existen humedales artificiales de diversas características físicas. En el presente trabajo, el objetivo es determinar la diversidad de los vertebrados en estos entornos acuáticos urbanos para evaluar el grado de impacto de la actividad recreativa en la conservación de los vertebrados asociados a los cuerpos de agua. El estudio se realizó en tres lagunas artificiales incluidas en el parque: Regatas, Rosedal y Planetario. En total, diecisiete especies de peces (Prochilodus lineatus, Oligosarcus jenynsii, Cheirodon interruptus, Bryconamericus iheringii, Hoplias malabaricus, Hypostomus commersoni, Rhamdia quelen, Pimelodus albicans, Pimelodus maculatus, Cyprinus carpio, Cnesterodon decemmaculatus, Gambusia affinis, Jenynsia multidentata, Synbranchus marmoratus, Australoheros facetus, Gymnogeophagus meridionalis and Crenicichla scottii), dieciocho especies de aves (Podiceps rolland, Podilymbus podiceps, Podiceps major, Phalacrocorax olivacius, Ardea alba, Egretta thula, Butorides striatus, Nycticorax nycticorax, Anas georgica, Anas platyrhynchos, Anas platyrhynchos domesticus, Anser anser, Cairina moschata, Netta peposaca, Aramus guarauna, Fulica armillata, Fulica leucoptera and Chloroceyle amazona), tres especies de tortugas (Phrynops hilarii, Trachemys scripta elegans y Trachemys venusta) y una especie de mamífero (Myocastor coipo). Entre estas especies, se presentan ocho introducidas: dos peces (Cyprinus carpio y Gambusia affinis), dos tortugas (Trachemys scripta elegans y Trachemys venusta) y cuatro aves (Anas platyrhynchos, Anas platyrhynchos domesticus, Anser anser y Cairina moschata). Regatas fue el sitio con mayor diversidad de peces (n = 17) que representa un 10.43% de la ictiofauna del Río de la Plata (n = 163). Este sitio alberga un 13% de las especies de aves asociadas a cuerpos de agua registrados en la Ciudad de Buenos Aires (n = 107). Al comparar la riqueza específica entre las lagunas, encontramos una gran similitud entre Regatas y Planetario. Además, ambos sitios presentaron la mayor riqueza específica de peces durante los meses de enero y febrero. A partir de este estudio preliminar, fue posible describir y diferenciar cada laguna por su fauna y características físicas, y también constituye la base para continuar con estudios adicionales de las comunidades que permitan el desarrollo de las pautas de manejo necesarias para la protección de Lago Tres de febrero
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Diversidad de vertebrados acuáticos de tres humedales urbanos de la ciudad de Buenos Aires
2018Co-Authors: Llamazares Vegh S., Villatarco Vázquez A. P., Kunert M. C., Tombari, Andrea D.Abstract:The urban wetlands are sites of high biodiversity that are under a great anthropogenic pressure. In the city of Buenos Aires, one of the more important areas of recreation is constituted by Parque Tres de Febrero (well-known as like “Bosques de Palermo”), that conforms a Green Zone of 25 ha. In this area there are artificial wetlands of diverse physical characteristics. In the present work, the goal is to determine vertebrate’s diversity in these urban aquatic enviroments in order to evaluate the degree of impact of the recreational activity on the conservation of the vertebrates associated to the water bodies. The study was carried out in three artificial lagoons included in the park: Regatas, Rosedal and Planetario. Altogether, seventeen species of fish (Prochilodus lineatus, Oligosarcus jenynsii, Cheirodon interruptus, Bryconamericus iheringii, Hoplias malabaricus, Hypostomus commersoni, Rhamdia quelen, Pimelodus albicans, Pimelodus maculatus, Cyprinus carpio carpio, Cnesterodon decemmaculatus, Gambusia affinis, Jenynsia multidentata, Synbranchus marmoratus, Australoheros facetus, Gymnogeophagus meridionalis and Crenicichla scottii), eighteen species of birds (Podiceps rolland, Podilymbus podiceps, Podiceps major, Phalacrocorax olivaceus, Ardea alba, Egretta thula, Butorides striatus, Nycticorax nycticorax, Anas georgica, Anas platyrhynchos, Anas platyrhynchos domesticus, Anser anser, Cairina moschata, Netta peposaca, Aramus guarauna, Fulica armillata, Fulica leucoptera and Chloroceyle amazona), three species of turtles (Phrynops hilarii, Trachemys scripta elegans and Trachemys venusta) and one species of mammal were registered (Myocastor coipo). Among these species, eight are introduced: two fishes (Cyprinus carpio carpio and Gambusia affinis), two turtles (Trachemys scripta elegans and Trachemys venusta) and four birds (Anas platyrhynchos, Anas platyrhynchos domesticus, Anser anser and Cairina moschata). Regatas was the site with greater diversity of fishes (n=17) that represents a 10.43% of Río de la Plata’s ichthyofauna (n=163). This site lodges a 13% of the bird species associated to registered water bodies in the City of Buenos Aires (n=107). When comparing the specific richness among lagoons, we found high similarity between Regatas and Planetarium. Also, both sites presented the greatest specific richness of fish during the months of January and February. From this preliminary study it was possible to describe and to differentiate each lagoon by its fauna and physical characteristics, and also it constitutes the base to continue with further studies of communities which allow the development of the necessary guidelines of handling for the protection of Lagos Tres de Febrero.Instituto de Limnología "Raúl A. Ringuelet
Michel Cuney - One of the best experts on this subject based on the ideXlab platform.
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Fluids preserved in variably altered graphitic pelitic schists in the Dufferin Lake Zone, south-central Athabasca Basin, Canada: implications for graphite loss and uranium deposition
Mineralium Deposita, 2016Co-Authors: Marjolaine Pascal, Marie-christine Boiron, Kevin Ansdell, Irvine R. Annesley, Tom Kotzer, Dan Jiricka, Michel CuneyAbstract:The Athabasca Basin (Canada) contains the highest grade unconformity-type uranium deposits in the world. Underlying the Athabasca Group sedimentary rocks of the Dufferin Lake Zone are variably graphitic, pelitic schists (VGPS), altered to chlorite and hematite (Red/Green Zone: RGZ). They were locally bleached near the unconformity during paleoweathering and/or later fluid interaction. Overall, graphite was lost from the RGZ and the bleached Zone relative to the original VGPS. Fluid inclusions were examined in different generations of quartz veins, using microthermometry and Raman spectroscopy, to characterize and compare the different fluids that interacted with the RGZ and the VGPS. In the VGPS, CH_4-, and N_2-rich fluid inclusions, which homogenize into the vapor phase between −100 and −74 °C, and −152 and −125 °C, respectively, and CO_2-rich fluid inclusions, homogenizing either into vapor or liquid between 20 and 28 °C, are present. Carbonic fluids could be the result of the breakdown of graphite to CH_4 + CO_2, whereas N_2-rich fluid is interpreted to be the result of breakdown of feldspars/micas to NH_4 ^++N_2. In the RGZ, the presence of fluid inclusions with low ice melting temperature (−38 to −16 °C) reflect the presence of CaCl_2, and fluid inclusions with halite daughter minerals that dissolve between 190 and 240 °C indicate the presence of highly saline fluids. These fluids are interpreted to be derived from the Athabasca Basin. The circulation of carbonic fluids and brines occurred during two different events related to different P-T conditions of trapping. The carbonic fluids interacted with basement rocks during retrograde metamorphism of the basement rocks before deposition of the Athabasca Basin, whereas the brines circulated after the deposition of the Athabasca Basin. These latter fluids are similar to brines related to uranium mineralization at McArthur River and thus, in addition to possibly being related to graphite depletion in the RGZ, they could be linked to uranium mineralization.
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u redox fronts and kaolinisation in basement hosted unconformity related u ores of the athabasca basin canada late u remobilisation by meteoric fluids
Mineralium Deposita, 2011Co-Authors: Julien Mercadier, Michel Cuney, Michel Cathelineau, Mathieu LacordeAbstract:Proterozoic basement-hosted unconformity-related uranium deposits of the Athabasca Basin (Saskatchewan, Canada) were affected by significant uranium redistribution along oxidation–reduction redox fronts related to cold and late meteoric fluid infiltration. These redox fronts exhibit the same mineralogical and geochemical features as the well-studied uranium roll-front deposits in siliclastic rocks. The primary hydrothermal uranium mineralisation (1.6–1.3 Ga) of basement-hosted deposits is strongly reworked to new disseminated ores comprising three distinctly coloured Zones: a white-Green Zone corresponding to the previous clay-rich alteration halo contemporaneous with hydrothermal ores, a uranium front corresponding to the uranium deposition Zone of the redox front (brownish Zone, rich in goethite) and a hematite-rich red Zone marking the front progression. The three Zones directly reflect the mineralogical zonation related to uranium oxides (pitchblende), sulphides, iron minerals (hematite and goethite) and alumino-phosphate-sulphate (APS) minerals. The zoning can be explained by processes of dissolution–precipitation along a redox interface and was produced by the infiltration of cold (<50°C) meteoric fluids to the hydrothermally altered areas. U, Fe, Ca, Pb, S, REE, V, Y, W, Mo and Se were the main mobile elements in this process, and their distribution within the three Zones was, for most of them, directly dependent on their redox potential. The elements concentrated in the redox fronts were sourced by the alteration of previously crystallised hydrothermal minerals, such as uranium oxides and light rare earth element (LREE)-rich APS. The uranium oxides from the redox front are characterised by LREE-enriched patterns, which differ from those of unconformity-related ores and clearly demonstrate their distinct conditions of formation. Uranium redox front formation is thought to be linked to fluid circulation episodes initiated during the 400–300 Ma period during uplift and erosion of the Athabasca Basin when it was near the Equator and to have been still active during the last million years. A major kaolinisation event was caused by changes in the fluid circulation regime, reworking the primary uranium redox fronts and causing the redistribution of elements originally concentrated in the uranium-enriched meteoric-related redox fronts.
Llamazares Vegh Sabina - One of the best experts on this subject based on the ideXlab platform.
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Diversidad de vertebrados acuáticos de tres humedales urbanos de la ciudad de Buenos Aires
Instituto de Limnología "Raúl A. Ringuelet" Facultad de Ciencias Naturales y Museo (UNLP), 2019Co-Authors: Llamazares Vegh Sabina, Villatarco Vázquez Paola, Kunert, María Cecilia, Tombari, Andrea D.Abstract:The urban wetlands are sites of high biodiversity that are under a great anthropogenic pressure. In the city of Buenos Aires, one of the more important areas of recreation is constituted by Parque Tres de Febrero (well-known as like “Bosques de Palermo”), that conforms a Green Zone of 25 ha. In this area there are artificial wetlands of diverse physical characteristics. In the present work, the goal is to determine vertebrate’s diversity in these urban aquatic enviroments in order to evaluate the degree of impact of the recreational activity on the conservation of the vertebrates associated to the water bodies. The study was carried out in three artificial lagoons included in the park: Regatas, Rosedal and Planetario. Altogether, seventeen species of fish (Prochilodus lineatus, Oligosarcus jenynsii, Cheirodon interruptus, Bryconamericus iheringii, Hoplias malabaricus, Hypostomus commersoni, Rhamdia quelen, Pimelodus albicans, Pimelodus maculatus, Cyprinus carpio, Cnesterodon decemmaculatus, Gambusia affinis, Jenynsia multidentata, Synbranchus marmoratus, Australoheros facetus, Gymnogeophagus meridionalis and Crenicichla scottii), eighteen species of birds (Podiceps rolland, Podilymbus podiceps, Podiceps major, Phalacrocorax olivaceus, Ardea alba, Egretta thula, Butorides striatus, Nycticorax nycticorax, Anas georgica, Anas platyrhynchos, Anas platyrhynchos domesticus, Anser anser, Cairina moschata, Netta peposaca, Aramus guarauna, Fulica armillata, Fulica leucoptera and Chloroceyle amazona), three species of turtles (Phrynops hilarii, Trachemys scripta elegans and Trachemys venusta) and one species of mammal were registered (Myocastor coipo). Among these species, eight are introduced: two fishes (Cyprinus carpio and Gambusia affinis), two turtles (Trachemys scripta elegans and Trachemys venusta) and four birds (Anas platyrhynchos, Anas platyrhynchos domesticus, Anser anser and Cairina moschata). Regatas was the site with greater diversity of fishes (n=17) that represents a 10.43% of Río de la Plata’s ichthyofauna (n=163). This site lodges a 13% of the bird species associated to registered water bodies in the City of Buenos Aires (n=107). When comparing the specific richness among lagoons, we found high similarity between Regatas and Planetarium. Also, both sites presented the greatest specific richness of fish during the months of January and February. From this preliminary study it was possible to describe and to differentiate each lagoon by its fauna and physical characteristics, and also it constitutes the base to continue with further studies of communities which allow the development of the necessary guidelines of handling for the protection of Lagos Tres de Febrero.Los humedales urbanos son sitios de alta biodiversidad que se encuentran bajo una gran presión antropogénica. En la ciudad de Buenos Aires, una de las áreas de recreación más importantes está constituida por el Parque Tres de Febrero (conocido como "Bosques de Palermo"), que conforma una zona verde de 25 hectáreas. En esta zona existen humedales artificiales de diversas características físicas. En el presente trabajo, el objetivo es determinar la diversidad de los vertebrados en estos entornos acuáticos urbanos para evaluar el grado de impacto de la actividad recreativa en la conservación de los vertebrados asociados a los cuerpos de agua. El estudio se realizó en tres lagunas artificiales incluidas en el parque: Regatas, Rosedal y Planetario. En total, diecisiete especies de peces (Prochilodus lineatus, Oligosarcus jenynsii, Cheirodon interruptus, Bryconamericus iheringii, Hoplias malabaricus, Hypostomus commersoni, Rhamdia quelen, Pimelodus albicans, Pimelodus maculatus, Cyprinus carpio, Cnesterodon decemmaculatus, Gambusia affinis, Jenynsia multidentata, Synbranchus marmoratus, Australoheros facetus, Gymnogeophagus meridionalis and Crenicichla scottii), dieciocho especies de aves (Podiceps rolland, Podilymbus podiceps, Podiceps major, Phalacrocorax olivacius, Ardea alba, Egretta thula, Butorides striatus, Nycticorax nycticorax, Anas georgica, Anas platyrhynchos, Anas platyrhynchos domesticus, Anser anser, Cairina moschata, Netta peposaca, Aramus guarauna, Fulica armillata, Fulica leucoptera and Chloroceyle amazona), tres especies de tortugas (Phrynops hilarii, Trachemys scripta elegans y Trachemys venusta) y una especie de mamífero (Myocastor coipo). Entre estas especies, se presentan ocho introducidas: dos peces (Cyprinus carpio y Gambusia affinis), dos tortugas (Trachemys scripta elegans y Trachemys venusta) y cuatro aves (Anas platyrhynchos, Anas platyrhynchos domesticus, Anser anser y Cairina moschata). Regatas fue el sitio con mayor diversidad de peces (n = 17) que representa un 10.43% de la ictiofauna del Río de la Plata (n = 163). Este sitio alberga un 13% de las especies de aves asociadas a cuerpos de agua registrados en la Ciudad de Buenos Aires (n = 107). Al comparar la riqueza específica entre las lagunas, encontramos una gran similitud entre Regatas y Planetario. Además, ambos sitios presentaron la mayor riqueza específica de peces durante los meses de enero y febrero. A partir de este estudio preliminar, fue posible describir y diferenciar cada laguna por su fauna y características físicas, y también constituye la base para continuar con estudios adicionales de las comunidades que permitan el desarrollo de las pautas de manejo necesarias para la protección de Lago Tres de febrero
Perea Carot Daniel - One of the best experts on this subject based on the ideXlab platform.
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La biodiversidad como herramienta en la gestión integrada de las plagas de Quercus ilex en áreas verdes urbanas de la ciudad de Valencia
'Universitat Politecnica de Valencia', 2018Co-Authors: Perea Carot DanielAbstract:[ES] Quercus ilex L. (encinas o carrascas) son árboles típicos mediterráneos que se encuentran habitualmente plantados en las áreas verdes urbanas de las ciudades. La estructura de la zona verde y la diversidad de especies vegetales que rodean a los árboles deben influir en la abundancia de artrópodos presentes en ellos, como son las especies plaga y sus enemigos naturales. Con el objetivo de analizar esta influencia se han elegido seis zonas en la ciudad de Valencia de tres categorías diferentes: jardines de acompañamiento viario, jardines de barrio y jardines históricos. En las seis zonas de estudio se seleccionó una zona de 25 metros de diámetro alrededor de un ejemplar de Q. ilex, teniendo en cuenta que siempre en esta área hubiera dos ejemplares más como mínimo de la especie. En esta área, se realizaron inventarios botánicos durante la primavera para permitir la identificación de especies, al ser época de floración. Además, se midió el porcentaje de cobertura de cada una ellas y además el porcentaje de cobertura de otros usos del suelo (suelo impermeable, morterenca, infraestructuras de tránsito¿). Para evaluar la biodiversidad de artrópodos, se realizaron muestreos y conteos desde febrero a junio de 2018 en tres encinas de cada zona de estudio. Además, también se utilizaron trampas multiembudo y trampas amarillas pegajosas para conocer presencia y abundancia de insectos que no podían ser contabilizados mediante el muestreo de material vegetal de los árboles. En cada fecha de muestreo se cortaba una rama al azar de cada árbol, que se trasladaba al laboratorio donde se analizaban todos los artrópodos presentes en las hojas y ramas. Los resultados obtenidos mostraron que sí se establecía una relación entre la riqueza de artrópodos, la riqueza de enemigos naturales y la cobertura. Así, cuanto mayor era la cobertura la riqueza de artrópodos y de enemigos naturales aumentaba. Además, se encontraron mayores problemas de plaga en zonas donde la cobertura era menor, aunque no en todos los casos. La calle Alboraia presentó graves problemas de daños por Kermes vermilio y algunos individuos de Syananthedon codeti, los cuales indican que el arbolado se encontraba debilitado o con afecciones que lo volvían más vulnerable frente a las plagas. La principal hipótesis desarrollada se centra en que la cobertura favorece distintos factores abióticos (retención de humedad, temperatura e insolación) y bióticos (diversidad de especies) los cuales afectan al estado de salud del árbol y, por tanto, a su resistencia y resiliencia contra las plagas.[EN] Quercus ilex L. (everGreen oaks or holm oaks) are typical Mediterranean trees which are usually planted in the urban Green spaces of the cities. The structure of the Green Zone and the diversity of plant species that surround the trees should influence the abundance of arthropods present in them, such as the pest species and their natural enemies are. In order to analyze this influence, six Zones have been chosen in Valencia City from three different categories: road support gardens, neighbourhood gardens and historic gardens. In the six study Zones, an area of 25 meters in diameter was selected around a specimen of Q. ilex, bearing in mind that in this area there would always be at least two more specimens of the specie. In this area, botanical inventories were carried out during the spring to allow the identification of species, as it is the time of flowering. In addition, the percentage of coverage of each of them was measured, as well as the percentage of coverage of other land uses (impermeable soil, compacted sand, traffic infrastructures¿). To evaluate the arthropod biodiversity, samplings and counts were carried out from February to June 2018 in three oaks of each study area. In addition, multi-funnel traps and sticky yellow traps were also used to know the presence and abundance of insects that could not be accounted for by sampling plant material from the trees. At each sampling date, a branch was cut at random from each tree, which was transferred to the laboratory where all the arthropods present in the leaves and branches were analysed. The obtained results showed that a relationship was established between the richness of arthropods, the richness of natural enemies and the coverage. Thus, as the coverage was greatest, the affluence of arthropods and natural enemies were bigger. In addition, mainly pest problems were found in areas where coverage was lower, although not in all of the cases. Alboraia Street presented serious problems on damage by Kermes vermilio and some individuals of Syananthedon codeti, which indicate that the trees were weakened or with conditions that made them more vulnerable to pests. The main hypothesis developed focuses on the fact that the coverage encourages different abiotic factors (moisture retention, temperature and insolation) and biotic (diversity of species) which affect the state of health of the tree and therefore, its resistance and resilience against the pests.Perea Carot, D. (2018). La biodiversidad como herramienta en la gestión integrada de las plagas de Quercus ilex en áreas verdes urbanas de la ciudad de Valencia. http://hdl.handle.net/10251/109206TFG
Llamazares Vegh S. - One of the best experts on this subject based on the ideXlab platform.
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Diversidad de vertebrados acuáticos de tres humedales urbanos de la ciudad de Buenos Aires
2018Co-Authors: Llamazares Vegh S., Villatarco Vázquez A. P., Kunert M. C., Tombari, Andrea D.Abstract:The urban wetlands are sites of high biodiversity that are under a great anthropogenic pressure. In the city of Buenos Aires, one of the more important areas of recreation is constituted by Parque Tres de Febrero (well-known as like “Bosques de Palermo”), that conforms a Green Zone of 25 ha. In this area there are artificial wetlands of diverse physical characteristics. In the present work, the goal is to determine vertebrate’s diversity in these urban aquatic enviroments in order to evaluate the degree of impact of the recreational activity on the conservation of the vertebrates associated to the water bodies. The study was carried out in three artificial lagoons included in the park: Regatas, Rosedal and Planetario. Altogether, seventeen species of fish (Prochilodus lineatus, Oligosarcus jenynsii, Cheirodon interruptus, Bryconamericus iheringii, Hoplias malabaricus, Hypostomus commersoni, Rhamdia quelen, Pimelodus albicans, Pimelodus maculatus, Cyprinus carpio carpio, Cnesterodon decemmaculatus, Gambusia affinis, Jenynsia multidentata, Synbranchus marmoratus, Australoheros facetus, Gymnogeophagus meridionalis and Crenicichla scottii), eighteen species of birds (Podiceps rolland, Podilymbus podiceps, Podiceps major, Phalacrocorax olivaceus, Ardea alba, Egretta thula, Butorides striatus, Nycticorax nycticorax, Anas georgica, Anas platyrhynchos, Anas platyrhynchos domesticus, Anser anser, Cairina moschata, Netta peposaca, Aramus guarauna, Fulica armillata, Fulica leucoptera and Chloroceyle amazona), three species of turtles (Phrynops hilarii, Trachemys scripta elegans and Trachemys venusta) and one species of mammal were registered (Myocastor coipo). Among these species, eight are introduced: two fishes (Cyprinus carpio carpio and Gambusia affinis), two turtles (Trachemys scripta elegans and Trachemys venusta) and four birds (Anas platyrhynchos, Anas platyrhynchos domesticus, Anser anser and Cairina moschata). Regatas was the site with greater diversity of fishes (n=17) that represents a 10.43% of Río de la Plata’s ichthyofauna (n=163). This site lodges a 13% of the bird species associated to registered water bodies in the City of Buenos Aires (n=107). When comparing the specific richness among lagoons, we found high similarity between Regatas and Planetarium. Also, both sites presented the greatest specific richness of fish during the months of January and February. From this preliminary study it was possible to describe and to differentiate each lagoon by its fauna and physical characteristics, and also it constitutes the base to continue with further studies of communities which allow the development of the necessary guidelines of handling for the protection of Lagos Tres de Febrero.Instituto de Limnología "Raúl A. Ringuelet
