48 results on '"RUGGERA, ROMÁN A."'
Search Results
2. Benefits to the germination of seeds provided by birds that mandibulate fleshy fruits
- Author
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Ruggera, Román A., Rojas, Tobias N., Gomez, M. Daniela, Salas, M. Gabriela, and Blendinger, Pedro G.
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- 2021
- Full Text
- View/download PDF
3. Identification of tree groups used by secondary cavity-nesting birds to simplify forest management in subtropical forests
- Author
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Schaaf, Alejandro A., Ruggera, Román A., Tallei, Ever, Vivanco, Constanza G., Rivera, Luis, and Politi, Natalia
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- 2020
- Full Text
- View/download PDF
4. Responses of functional traits in cavity-nesting birds to logging in subtropical and temperate forests of the Americas
- Author
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Schaaf, Alejandro A., Gomez, Daniela, Tallei, Ever, Vivanco, Constanza G., and Ruggera, Román A.
- Published
- 2021
- Full Text
- View/download PDF
5. Seed-dispersal networks are more specialized in the Neotropics than in the Afrotropics
- Author
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Dugger, Phillip J., Blendinger, Pedro G., Böhning-Gaese, Katrin, Chama, Lackson, Correia, Marta, Dehling, D. Matthias, Emer, Carine, Farwig, Nina, Fricke, Evan C., Galetti, Mauro, García, Daniel, Grass, Ingo, Heleno, Ruben, Jacomassa, Fábio A. F., Moraes, Suelen, Moran, Catherine, Muñoz, Marcia C., Neuschulz, Eike Lena, Nowak, Larissa, Piratelli, Augusto, Pizo, Marco A., Quitián, Marta, Rogers, Haldre S., Ruggera, Román A., Saavedra, Francisco, Sánchez, Mariano S., Sánchez, Rocío, Santillán, Vinicio, Schabo, Dana G., da Silva, Fernanda Ribeiro, Timóteo, Sérgio, Traveset, Anna, Vollstädt, Maximilian G. R., and Schleuning, Matthias
- Published
- 2019
6. Comparing different citizen science platforms for collecting urban ecological data from Toco toucan (Ramphastos toco) in Argentina
- Author
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Schaaf, Alejandro A., primary, Haag, Laura M., additional, Gonzalez Baffa‐Trasci, Noelia V., additional, Yapura, Agustina, additional, Chocobar, Natalia, additional, Caldano, Sol A., additional, and Ruggera, Román A., additional
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- 2023
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7. The role of trait combination in the conspicuousness of fruit display among bird-dispersed plants
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Ordano, Mariano, Blendinger, Pedro G., Lomáscolo, Silvia B., Chacoff, Natacha P., Sánchez, Mariano S., Montellano, María G. Núñez, Jiménez, Julieta, Ruggera, Román A., and Valoy, Mariana
- Published
- 2017
8. Comparing different citizen science platforms for collecting urban ecological data from Toco toucan (Ramphastos toco) in Argentina.
- Author
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Schaaf, Alejandro A., Haag, Laura M., Gonzalez Baffa‐Trasci, Noelia V., Yapura, Agustina, Chocobar, Natalia, Caldano, Sol A., and Ruggera, Román A.
- Subjects
CITIZEN science ,ANIMAL species ,CITIES & towns ,DATA distribution - Abstract
Citizen science projects are valuable tools since they provide substantial amounts of data on different animal species. Currently, there are a wide variety of platforms and objectives for diverse citizen science projects. Despite these advances, the approaches and contributions of citizen science platforms for collecting data on a particular species, and in a specific site or region, have been poorly explored. Thus, in this article, we compare the number of participants and the amount of data collected by three platforms on the Toco toucan (Ramphastos toco) in San Salvador de Jujuy city, located in northwestern Argentina. This particular bird species is very charismatic and frequents urban areas all year round; so that, it is interesting to know what contributions (e.g. participant numbers, ecological and distribution data) are being made about this species on citizen science platforms. Thus, we examined data reported by two global citizen science platforms, iNaturalist and eBird, and one local platform, Tucanes en mi Jujuy (TEMJ). We found that the local, focal TEMJ project had a greater number of participants (n = 193), greater presence records (n = 614) and a wide spatial distribution of data in the city. In the iNaturalist and eBird platforms, the number of participants was smaller (n = 9 and 36, respectively), with fewer presence records (n = 12 and 178, respectively), and even fewer reports of species‐specific ecological data (feeding, behaviour and age). This reflected clear differences between the three platforms, as TEMJ not only reported more presence data but also more detailed information on age and behaviour. Based on this research, we highlight the commitment of citizens to this particular project and the study of species. Therefore, we recommend the implementation of new local and focal citizen science platforms for more detailed ecological data on other charismatic and focal species. [ABSTRACT FROM AUTHOR]
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- 2024
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9. Fruit selection by Andean forest birds : influence of fruit functional traits and their temporal variation
- Author
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Blendinger, Pedro G., Martín, Eduardo, Acosta, Oriana Osinaga, Ruggera, Román A., and Aráoz, Ezequiel
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- 2016
10. Composición y variación estacional de la comunidad de aves urbanas en San Salvador de Jujuy, Argentina
- Author
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Yapura, Agustina M., primary, Ruggera, Román A., additional, Gonzalez Baffa Trasci, Noelia V., additional, Caldano, Sol A., additional, Chocobar, Natalia, additional, and Schaaf, Alejandro A., additional
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- 2022
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11. Ecología urbana del Tucán Grande (Ramphastos toco) en Jujuy: resultados preliminares de un proyecto de ciencia ciudadana
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Ruggera, Román A., primary, Yapura, Agustina, additional, Chocobar, Natalia, additional, González Baffa-Trasci, Noelia, additional, Caldano, Sol A., additional, and Schaaf, Alejandro A., additional
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- 2022
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12. Nutrient balance and energy‐acquisition effectiveness: Do birds adjust their fruit diet to achieve intake targets?
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Blendinger, Pedro G., primary, Rojas, Tobias N., additional, Ramírez‐Mejía, Andrés F., additional, Bender, Irene M. A., additional, Lomáscolo, Silvia, additional, Magro, Julieta, additional, Núñez Montellano, M. Gabriela, additional, Ruggera, Román A., additional, Valoy, Mariana, additional, and Ordano, Mariano, additional
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- 2022
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13. Fine-tuning the fruit-tracking hypothesis: spatiotemporal links between fruit availability and fruit consumption by birds in Andean mountain forests
- Author
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Blendinger, Pedro G., Ruggera, Román A., Montellano, M. Gabriela Núñez, Macchi, Leandro, Zelaya, Patricia V., Álvarez, M. Eva, Martín, Eduardo, Acosta, Oriana Osinaga, Sánchez, Rocío, and Haedo, Josefina
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- 2012
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14. BREEDING BIOLOGY AND NATURAL HISTORY OF THE SLATE-THROATED WHITESTART IN VENEZUELA
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RUGGERA, ROMÁN A. and MARTIN, THOMAS E.
- Published
- 2010
15. Data and code: Global and regional ecological boundaries explain abrupt spatial discontinuities in avian frugivory interactions
- Author
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University of Canterbury (New Zealand), Royal Marsden NHS Foundation Trust, Earthwatch Institute, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, Universidade Estadual de Santa Cruz (Brasil), Fundação de Amparo à Pesquisa do Estado da Bahia, European Commission, Fonds National Suisse de la Recherche Scientifique, Association de la Recherche Contre le Cancer (France), Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina), Instituto Venezolano de Investigaciones Científicas, Fundação de Amparo à Pesquisa do Estado de São Paulo, Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), Rufford Foundation, German Research Foundation, Fundação para a Ciência e a Tecnologia (Portugal), Martins, Lucas P. [0000-0003-3249-1070], Martins, Lucas P. [martinslucas.p@gmail.com], Martins, Lucas P., Stouffer, Daniel B., Blendinger, Pedro G., Böhning-Gaese, Katrin, Buitrón-Jurado, Galo, Correia, Marta, Costa, José Miguel, Dehling, D. Matthias, Donatti, Camila I., Emer, Carine, Galetti, Mauro, Heleno, Rubén H., Jordano, Pedro, Menezes, Ícaro, Morante-Filho, José Carlos, Muñoz, Marcia C., Pizo, Marco A., Quitián, Marta, Ruggera, Román A., Saavedra, Francisco, Santillán, Vinicio, Sanz D’Angelo, Virginia, Schleuning, Matthias, Silva, Luis Pascual da, Ribeiro da Silva, Fernando, Timóteo, Sérgio, Traveset, Anna, Vollstädt, Maximilian G. R., Tylianakis, Jason M., University of Canterbury (New Zealand), Royal Marsden NHS Foundation Trust, Earthwatch Institute, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, Universidade Estadual de Santa Cruz (Brasil), Fundação de Amparo à Pesquisa do Estado da Bahia, European Commission, Fonds National Suisse de la Recherche Scientifique, Association de la Recherche Contre le Cancer (France), Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina), Instituto Venezolano de Investigaciones Científicas, Fundação de Amparo à Pesquisa do Estado de São Paulo, Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), Rufford Foundation, German Research Foundation, Fundação para a Ciência e a Tecnologia (Portugal), Martins, Lucas P. [0000-0003-3249-1070], Martins, Lucas P. [martinslucas.p@gmail.com], Martins, Lucas P., Stouffer, Daniel B., Blendinger, Pedro G., Böhning-Gaese, Katrin, Buitrón-Jurado, Galo, Correia, Marta, Costa, José Miguel, Dehling, D. Matthias, Donatti, Camila I., Emer, Carine, Galetti, Mauro, Heleno, Rubén H., Jordano, Pedro, Menezes, Ícaro, Morante-Filho, José Carlos, Muñoz, Marcia C., Pizo, Marco A., Quitián, Marta, Ruggera, Román A., Saavedra, Francisco, Santillán, Vinicio, Sanz D’Angelo, Virginia, Schleuning, Matthias, Silva, Luis Pascual da, Ribeiro da Silva, Fernando, Timóteo, Sérgio, Traveset, Anna, Vollstädt, Maximilian G. R., and Tylianakis, Jason M.
- Abstract
Species interactions can propagate disturbances across space via direct and indirect effects, potentially connecting species at a global scale. However, ecological and biogeographic boundaries may mitigate this spread by demarcating the limits of ecological networks. We tested whether large-scale ecological boundaries (ecoregions and biomes) and human disturbance gradients increase dissimilarity among plant-frugivore networks, while accounting for background spatial and elevational gradients and differences in network sampling. We assessed network dissimilarity patterns over a broad spatial scale, using 196 quantitative avian frugivory networks (encompassing 1,496 plant and 1,004 bird species) distributed across 67 ecoregions, 11 biomes, and 6 continents. We show that dissimilarities in species and interaction composition, but not network structure, are greater across ecoregion and biome boundaries and along different levels of human disturbance. Our findings indicate that biogeographic boundaries delineate the world’s biodiversity of interactions and likely contribute to mitigating the propagation of disturbances at large spatial scales.
- Published
- 2022
16. Global and regional ecological boundaries explain abrupt spatial discontinuities in avian frugivory interactions
- Author
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University of Canterbury (New Zealand), Royal Marsden NHS Foundation Trust, Fundação de Amparo à Pesquisa do Estado de São Paulo, Earthwatch Institute, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), Rufford Foundation, Universidade Estadual de Santa Cruz (Brasil), Fundação de Amparo à Pesquisa do Estado da Bahia, European Commission, Swiss National Science Foundation, Securing Antarctica's Environmental Future (Australia), German Research Foundation, Fundação para a Ciência e a Tecnologia (Portugal), Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina), Instituto Venezolano de Investigaciones Científicas, Martins, Lucas P., Stouffer, Daniel B., Blendinger, Pedro G., Böhning-Gaese, Katrin, Buitrón-Jurado, Galo, Correia, Marta, Costa, José Miguel, Dehling, D. Matthias, Donatti, Camila I., Emer, Carine, Galetti, Mauro, Heleno, Rubén H., Jordano, Pedro, Menezes, Ícaro, Morante-Filho, José Carlos, Muñoz, Marcia C., Pizo, Marco A., Quitián, Marta, Ruggera, Román A., Saavedra, Francisco, Santillán, Vinicio, Sanz D’Angelo, Virginia, Schleuning, Matthias, Silva, Luis Pascual da, Ribeiro da Silva, Fernando, Timóteo, Sérgio, Traveset, Anna, Vollstädt, Maximilian G. R., Tylianakis, Jason M., University of Canterbury (New Zealand), Royal Marsden NHS Foundation Trust, Fundação de Amparo à Pesquisa do Estado de São Paulo, Earthwatch Institute, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), Rufford Foundation, Universidade Estadual de Santa Cruz (Brasil), Fundação de Amparo à Pesquisa do Estado da Bahia, European Commission, Swiss National Science Foundation, Securing Antarctica's Environmental Future (Australia), German Research Foundation, Fundação para a Ciência e a Tecnologia (Portugal), Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina), Instituto Venezolano de Investigaciones Científicas, Martins, Lucas P., Stouffer, Daniel B., Blendinger, Pedro G., Böhning-Gaese, Katrin, Buitrón-Jurado, Galo, Correia, Marta, Costa, José Miguel, Dehling, D. Matthias, Donatti, Camila I., Emer, Carine, Galetti, Mauro, Heleno, Rubén H., Jordano, Pedro, Menezes, Ícaro, Morante-Filho, José Carlos, Muñoz, Marcia C., Pizo, Marco A., Quitián, Marta, Ruggera, Román A., Saavedra, Francisco, Santillán, Vinicio, Sanz D’Angelo, Virginia, Schleuning, Matthias, Silva, Luis Pascual da, Ribeiro da Silva, Fernando, Timóteo, Sérgio, Traveset, Anna, Vollstädt, Maximilian G. R., and Tylianakis, Jason M.
- Abstract
Species interactions can propagate disturbances across space via direct and indirect effects, potentially connecting species at a global scale. However, ecological and biogeographic boundaries may mitigate this spread by demarcating the limits of ecological networks. We tested whether large-scale ecological boundaries (ecoregions and biomes) and human disturbance gradients increase dissimilarity among plant-frugivore networks, while accounting for background spatial and elevational gradients and differences in network sampling. We assessed network dissimilarity patterns over a broad spatial scale, using 196 quantitative avian frugivory networks (encompassing 1496 plant and 1004 bird species) distributed across 67 ecoregions, 11 biomes, and 6 continents. We show that dissimilarities in species and interaction composition, but not network structure, are greater across ecoregion and biome boundaries and along different levels of human disturbance. Our findings indicate that biogeographic boundaries delineate the world’s biodiversity of interactions and likely contribute to mitigating the propagation of disturbances at large spatial scales.
- Published
- 2022
17. Natural History and Breeding Biology of the Rusty-Breasted Antpitta (Grallaricula ferrugineipectus)
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Niklison, Alina M., Areta, Juan I., Ruggera, Roman A., Decker, Karie L., Bosque, Carlos, and Martin, Thomas E.
- Published
- 2008
18. Linking structure and functionality in mutualistic networks: do core frugivores disperse more seeds than peripheral species?
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Ruggera, Román A., Blendinger, Pedro G., Gomez, Daniela M., and Marshak, Charlie
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- 2016
- Full Text
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19. Influence of logging on nest density and nesting microsites of cavity-nesting birds in the subtropical forests of the Andes
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Schaaf, Alejandro A, primary, García, Cecilia G, additional, Ruggera, Román A, additional, Tallei, Ever, additional, Vivanco, Constanza G, additional, Rivera, Luis, additional, and Politi, Natalia, additional
- Published
- 2021
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20. Functional Traits on Cavity-nesting Birds in Subtropical Andean Forest: Response to Logging Activity and Comparing with American Temperate Forests
- Author
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Schaaf, Alejandro A., primary, Gomez, Daniela, additional, Tallei, Ever, additional, Vivanco, Constanza G., additional, and Ruggera, Román A., additional
- Published
- 2021
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- View/download PDF
21. Nuevos registros para la distribución austral del Mosquitero (Corythopis delalandi - Tyrannidae) en el noroeste de Argentina
- Author
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Morales, Adriana Marisel, Tallei, Ever Denis, Schaaf, Alejandro Alberto, Ruggera, Román Alberto, Vivanco, Constanza Guadalupe, Albanesi, Sebastian Alejandro, Defossé, Guillermo Emilio, Politi, Natalia, and Rivera, Luis Osvaldo
- Subjects
purl.org/becyt/ford/1 [https] ,YUNGAS AUSTRALES ,CORYTHOPIS DELALANDI ,SELVA PEDEMONTANA ,MOSQUITERO ,purl.org/becyt/ford/1.6 [https] - Abstract
En las Yungas Australes, la distribución meridional de Corythopis delalandi abarca hasta las provincias de Salta y Jujuy, noroeste de Argentina. Presentamos un total de 16 nuevos registros para la especie en la Selva Pedemontana de las provincias de Salta y Jujuy, 10 de ellas obtenidas mediante 1976 puntos de conteo y 6 a partir de registros ocasionales. Nuestros registros fueron realizados principalmente en la estación húmeda, y nuestros resultados sugieren que la especie es poco abundante en la región. Es necesario realizar estudios que contribuyan con información que mejoren el conocimiento de la distribución y abundancia de esta especie. Hasta la actualidad se conoce un trabajo de la especie para Argentina publicado hace una década. Tener información actualizada de esta especie, que es poco abundante y de biología desconocida para Argentina, es necesario para futuros planes de manejo y programas de monitoreo para la conservación de la biodiversidad. The Southern Antpipit (Corythopis delalandi) is distributed along the Austral Yungas in the provinces of Salta and Jujuy. In this work we report 16 new records for the species in Salta and Jujuy. These records, mainly obtained during the wet season, were collected by 1976 point counts (N = 10) and occasional observations (N = 6). Our results suggest that Southern Antpipit is uncommon in the area. Furthermore, our records highlight the importance of carrying out new studies contributing to our knowledge on this species abundance and biology. Updated information of Southern Antpipit, an uncommon and unknown species in Argentina, is necessary for designing management and monitoring programs. Fil: Morales, Adriana Marisel. Fundación para la Conservación y Estudio de la Diversidad; Argentina. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina Fil: Tallei, Ever Denis. Fundación para la Conservación y Estudio de la Diversidad; Argentina. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina Fil: Schaaf, Alejandro Alberto. Fundación para la Conservación y Estudio de la Diversidad; Argentina. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina Fil: Ruggera, Román Alberto. Fundación para la Conservación y Estudio de la Diversidad; Argentina. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina Fil: Vivanco, Constanza Guadalupe. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina. Fundación para la Conservación y Estudio de la Diversidad; Argentina Fil: Albanesi, Sebastian Alejandro. Fundación para la Conservación y Estudio de la Diversidad; Argentina Fil: Defossé, Guillermo Emilio. Centro de Investigación y Extensión Forestal Andino Patagónico; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Politi, Natalia. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina. Fundación para la Conservación y Estudio de la Diversidad; Argentina Fil: Rivera, Luis Osvaldo. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina. Fundación para la Conservación y Estudio de la Diversidad; Argentina
- Published
- 2020
22. Patterns of taxonomic and functional diversity of birds in riparian forests with natural and agricultural matrices in the Argentine Austral Yungas
- Author
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Gomez, Daniela, primary, Ruggera, RomÁn A., additional, Rivera, Luis O., additional, and Politi, Natalia, additional
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- 2021
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23. Nuevos registros para la distribución austral del Mosquitero (Corythopis delalandi) en el noroeste de Argentina
- Author
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Morales, Adriana M., primary, Tallei, Ever D., additional, Schaaf, Alejandro A., additional, Ruggera, Román A., additional, Vivanco, Constanza G., additional, Albanesi, Sebastián A., additional, Defossé, Guillermo E., additional, Politi, Natalia, additional, and Osvaldo, Rivera L., additional
- Published
- 2020
- Full Text
- View/download PDF
24. Tree Use, Niche Breadth and Overlap for Excavation by Woodpeckers in Subtropical Piedmont Forests of Northwestern Argentina
- Author
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Schaaf, Alejandro A., primary, Ruggera, Román A., additional, Vivanco, Constanza G., additional, Tallei, Ever, additional, Benavidez, Analía, additional, Albanesi, Sebastián, additional, Rivera, Luis O., additional, and Politi, Natalia, additional
- Published
- 2020
- Full Text
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25. Functional diversity of tree cavities for secondary cavity-nesting birds in logged subtropical Piedmont forests of the Andes
- Author
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Schaaf, Alejandro A., primary, Gomez, Daniela, additional, Ruggera, Román A., additional, Tallei, Ever, additional, Vivanco, Constanza G., additional, Politi, Natalia, additional, and Rivera, Luis, additional
- Published
- 2020
- Full Text
- View/download PDF
26. Influence of logging on nest density and nesting microsites of cavity-nesting birds in the subtropical forests of the Andes.
- Author
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Schaaf, Alejandro A, García, Cecilia G, Ruggera, Román A, Tallei, Ever, Vivanco, Constanza G, Rivera, Luis, and Politi, Natalia
- Subjects
FOREST management ,FOREST birds ,LOGGING ,TREE age ,BIRD nests ,FORESTS & forestry ,DEAD - Abstract
Birds select nesting sites with certain characteristics associated with tree age and species that help to prevent or reduce the risk of clutch loss due to predation or unfavourable weather conditions. Logging may reduce the availability of trees and their related features that may be important for cavity nesters. Thus, the aim of this study is to evaluate the effect of logging on nest density, nesting microsite and nest success of cavity nesting birds at Piedmont forests of northwestern Argentina. We monitored these variables at different logged and unlogged sites during four consecutive reproductive seasons and analysed them using univariate analysis and generalized linear models. The main results indicate that logging reduces nest density and changes the characteristics of the nesting microsites. We found that nest success was greater in cavities located higher above the ground and found no evidence of lower nest success at logged sites. This study suggests the need for forest management actions aimed at increasing nesting sites for cavity-nesting birds. For this purpose, management should be focused on the retention of old trees with a diameter >50 cm (both living and dead). The use of reduced-impact logging techniques or forest certifications (e.g. Forest Stewardship Council) could provide alternatives in subtropical forests, as these forestry practices can ensure tree abundance and richness, providing features suitable for cavity-nesting birds (e.g. tree diameter, cavity size and height). [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
27. Seed‐dispersal networks are more specialized in the Neotropics than in the Afrotropics
- Author
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Dugger, Phillip James, Blendinger, Pedro Gerardo, Böhning-Gaese, Katrin, Chama, Lackson, Correia, Marta, Dehling, D. Matthias, Emer, Carine, Farwig, Nina, Fricke, Evan C., Galetti, Mauro, García, Daniel, Grass, Ingo, Heleno, Ruben, Jacomassa, Fábio André Facco, Moraes, Suelen, Moran, Catherine, Muñoz, Marcia Carolina, Neuschulz, Eike Lena, Nowak, Larissa, Piratelli, Augusto, Pizo, Marco Aurelio, Quitián, Marta, Rogers, Haldre S., Ruggera, Román A., Saavedra, Francisco, Sánchez, Mariano Sebastián, Sánchez, Rocío, Santillán, Vinicio, Schabo, Dana G., Ribeiro da Silva, Fernanda, Timóteo, Sérgio, Traveset, Anna, Vollstädt, Maximilian GR, and Schleuning, Matthias
- Subjects
Birds ,Mammals ,Neotropics ,Mutualism ,Seed dispersal ,Ecological networks ,Frugivory ,Macroecology ,Afrotropics - Abstract
Fil: Dugger, Phillip James. Universidad de Antioch Nueva Inglaterra. Departamento de Estudios Ambientales; Estados Unidos. Fil: Blendinger, Pedro Gerardo. Universidad Nacional de Tucumán. Instituto de Ecología Regional; Argentina. Fil: Blendinger, Pedro Gerardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ecología Regional; Argentina. Fil: Böhning-Gaese, Katrin. Instituto Senckenberg-Leibniz. Centro de Investigación de la Biodiversidad y el Clima de Senckenberg (Frankfurt); Alemania. Fil: Böhning-Gaese, Katrin. Universidad Goethe. Instituto de Ecología, Diversidad y Evolución; Alemania. Fil: Chama, Lackson. Universidad de Copperbelt. Escuela de Recursos Naturales. Departamento de Zoología y Ciencias Acuáticas; Zambia. Fil: Correia, Marta. Universidad de Coímbra. Centro de Ecología Funcional. Departamento de Ciencias de la Vida; Portugal. Fil: Dehling, D. Matthias. Universidad de Canterbury. Facultad de Ciencias Biológicas. Centro de Ecología Integrativa; Nueva Zelanda. Fil: Emer, Carine. Universidad Estatal Paulista. Instituto de Biociencias. Departamento de Ecología; Brasil. Fil: Farwig, Nina. Universidad de Marburgo. Facultad de Biología; Alemania. Fil: Fricke, Evan C. Universidad Estatal de Iowa. Departamento de Ecología, Evolución y Biología Organismal; Estados Unidos. Fil: Galetti, Mauro. Universidad Estatal Paulista. Instituto de Biociencias. Departamento de Ecología; Brasil. Fil: García, Daniel. Universidad de Oviedo. Departamento de Biología de Organismos y Sistemas; España. Fil: García, Daniel. Universidad de Oviedo. Unidad Mixta de Investigación en Biodiversidad; España. Fil: García, Daniel. Principado de Asturias (España). Ministerio de Ciencia e Innovación. Consejo Superior de Investigaciones Científicas. Unidad Mixta de Investigación en Biodiversidad; España. Fil: Grass, Ingo. Universidad de Göttingen. Facultad de Ciencias Agrarias. Departamento de Ciencias de los Cultivos; Alemania. Fil: Heleno, Ruben. Universidad de Coímbra. Centro de Ecología Funcional. Departamento de Ciencias de la Vida; Portugal. Fil: Jacomassa, Fábio André Facco. Universidad Estatal Paulista, Departamento de Zoología; Brasil. Fil: Jacomassa, Fábio André Facco. Universidad Estatal do Centro Oeste. Departamento de Ciencias Biológicas. Programa de Pos‐Graduación en Biología Evolutiva; Brasil. Aim: Biogeographical comparisons of interaction networks help to elucidate diffeences in ecological communities and ecosystem functioning at large scales. Neotropical ecosystems have higher diversity and a different composition of frugivores and fleshy‐fruited plants compared with Afrotropical systems, but a lack of intercontinental comparisons limits understanding of (a) whether plant–frugivore networks are structured in a similar manner, and (b) whether the same species traits define the roles of animals across continents. Location: Afrotropics and Neotropics. Time period: 1977–2015. Taxa: Fleshy‐fruited plants and frugivorous vertebrates. Methods: We compiled a dataset comprising 17 Afrotropical and 48 Neotropical weighted seed‐dispersal networks quantifying frugivory interactions between 1,091 fleshy‐fruited plant and 665 animal species, comprising in total 8,251 interaction links between plants and animals. In addition, we compiled information on the body mass of animals and their degree of frugivory. We compared four standard network level metrics related to interaction diversity and specialization, accounting for differences related to sampling effort and network location. Furthermore, we tested whether animal traits (body mass, degree of frugivory) differed between continents, whether these traits were related to the network roles of species and whether these relation ships varied between continents. Results: We found significant structural differences in networks between continents. Overall, Neotropical networkswere less nested and more specialized tan Afrotropical networks. At the species level, a higher body mass and degree of frugivory were as sociated with an increasing diversity of plant partners. Specialization of frugivores increased with the degree of frugivory, but only in the Neotropics. Main conclusions: Our findings show that Afrotropical networks have a greater overlap in plant partners among vertebrate frugivores than the more diverse networks in the Neotropics that are characterized by a greater niche partitioning. Hence, the loss of frugivore species could have stronger impacts on ecosystem functioning in the more specialized Neotropical communities compared with the more generalized Afrotropical communities.
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- 2019
28. Gastrointestinal parasites of wild blue-fronted amazons in Chaco, Argentina
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Berkunsky, Igor, Ruggera, Román A., López, María S., Faegre, Sara I., and Aramburú, Rosana Mariel
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Blue-fronted parrot ,Coccidios ,parasitic diseases ,Capillaria ,Coccidian ,Zoología ,Eimeria ,Loro hablador ,Ascaridia - Abstract
From capture to final destination, wild parrots experience several conditions during transport which enhance/promote chances of infections and transmission of diseases. A better understanding of the prevalence of parasites in wild blue-fronted amazons (Amazona aestiva) will allow a more efficient control of the parasitosis in those individuals destined to captivity. Furthermore, it will be helpful in determining which parasites are specific to the blue-fronted amazons and which are the result of infections from other host species during the commercialization process. The objective of this study was to establish the baseline of gastrointestinal parasites of wild blue-fronted am-azons in the Chaco region. We collected fecal samples of 38 nestlings and 4 adults, and examined four dead nestlings. One-third of examined nests (n=21) and one quarter of the individuals examined were positive for protozoa and helminths. At the individual level, Eimeria sp was the most prevalent (25%), followed by Isospora sp (5%), Giarda lamblia (5%), Capillaria sp (2%) and Ascaridia sp (2%). The tests for parasites in the viscera of the four nestlings found dead from natural causes weres negative. As in most wild studies, the prevalence of intestinal parasites in blue-fronted amazons was low, when compared to the parasitic infection levels reported for parrots in captivity. Because the nestlings of this parrot are frequently captured for pet trade, knowledge of the assemblage and prevalence of intestinal parasites of the species in wild individuals can be useful for the treatment of nestlings destined for captivity., Desde su captura hasta el destino final, los loros silvestres experimentan diferentes condiciones durante el transporte, originando así oportunidades de infección y transmisión de enfermedades. Conocer la prevalencia de parásitos en loros habladores silvestres (Amazona aestiva) permitirá un control más eficiente de las parasitosis en aquellos individuos destinados al cautiverio. Además, este trabajo ayudará a determinar qué parásitos son específicos del loro hablador, y cuales son los resultados de infecciones desde otras especies hospedadoras durante el proceso de comercialización. El objetivo de este estudio fue describir los parásitos gastrointestinales de los loros habladores en la región del Impenetrable Chaqueño, en Argentina. Fueron colectadas muestras de heces de 38 pichones y cuatro adultos. También se examinaron cuatro pichones muertos. Un tercio de los nidos inspeccionados (n=21) y un cuarto de los individuos examinados fueron positivos a la presencia de protozoos y helmintos. A nivel individual, Eimeria sp fue el parasito más prevalente (25%), seguido de Isospora sp (5%), Giardia lamblia (5%), Capillaria sp (2%) y Ascaridia sp (2%). Las inspecciones en busca de parásitos en las vísceras de los cuatro pichones hallados muertos por causas naturales, fueron negativas. Como en la mayoría de los estudios con loros silvestres, la prevalencia de parásitos intestinales en el loro hablador fue baja, si se compara con los valores reportados para loros en cautiverio. Debido a que los pichones de este loro son capturados frecuentemente para el tráfico de mascotas, conocer el ensamble de parásitos intestinales y su prevalencia en individuos silvestres, puede ser útil para el tratamiento de pichones destinados al cautiverio., Facultad de Ciencias Naturales y Museo
- Published
- 2019
29. Cambia la década, cambian los editores
- Author
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Berkunsky, Igor, primary and Ruggera, Román, additional
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- 2019
- Full Text
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30. Identification of tree groups used by secondary cavity-nesting birds to simplify forest management in subtropical forests
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Schaaf, Alejandro A., primary, Ruggera, Román A., additional, Tallei, Ever, additional, Vivanco, Constanza G., additional, Rivera, Luis, additional, and Politi, Natalia, additional
- Published
- 2019
- Full Text
- View/download PDF
31. Seed-dispersal networks are more specialized in the Neotropics than in the Afrotropics
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Center for Tropical Studies and Conservation (US), Robert Bosch Foundation, German Research Foundation, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brasil), Fundação de Amparo à Pesquisa do Estado de São Paulo, Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina), Fondo para la Investigación Científica y Tecnológica (Argentina), Colciencias (Colombia), Ministerio de Economía y Competitividad (España), Dugger, Phillip J., Blendinger, Pedro G., Böhning-Gaese, Katrin, Chama, Lackson, Correia, Marta, Dehling, D. Matthias, Emer, Carine, Farwig, Nina, Fricke, Evan C., Galetti, Mauro, García, Daniel, Grass, Ingo, Heleno, Rubén H., Jacomassa, Fábio A. F., Moraes, Suelen, Moran, Catherine, Muñoz, Marcia C., Neuschulz, Eike Lena, Nowak, Larissa, Piratelli, Augusto, Pizo, Marco A., Quitián, Marta, Rogers, Haldre S., Ruggera, Román A., Saavedra, Francisco, Sánchez, Mariano S., Sánchez, Rocío, Santillán, Vinicio, Schabo, Dana G., Ribeiro da Silva, Fernando, Timóteo, Sérgio, Traveset, Anna, Vollstädt, Maximilian G. R., Schleuning, Matthias, Center for Tropical Studies and Conservation (US), Robert Bosch Foundation, German Research Foundation, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brasil), Fundação de Amparo à Pesquisa do Estado de São Paulo, Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina), Fondo para la Investigación Científica y Tecnológica (Argentina), Colciencias (Colombia), Ministerio de Economía y Competitividad (España), Dugger, Phillip J., Blendinger, Pedro G., Böhning-Gaese, Katrin, Chama, Lackson, Correia, Marta, Dehling, D. Matthias, Emer, Carine, Farwig, Nina, Fricke, Evan C., Galetti, Mauro, García, Daniel, Grass, Ingo, Heleno, Rubén H., Jacomassa, Fábio A. F., Moraes, Suelen, Moran, Catherine, Muñoz, Marcia C., Neuschulz, Eike Lena, Nowak, Larissa, Piratelli, Augusto, Pizo, Marco A., Quitián, Marta, Rogers, Haldre S., Ruggera, Román A., Saavedra, Francisco, Sánchez, Mariano S., Sánchez, Rocío, Santillán, Vinicio, Schabo, Dana G., Ribeiro da Silva, Fernando, Timóteo, Sérgio, Traveset, Anna, Vollstädt, Maximilian G. R., and Schleuning, Matthias
- Abstract
[Aim] Biogeographical comparisons of interaction networks help to elucidate differences in ecological communities and ecosystem functioning at large scales. Neotropical ecosystems have higher diversity and a different composition of frugivores and fleshy-fruited plants compared with Afrotropical systems, but a lack of intercontinental comparisons limits understanding of (a) whether plant–frugivore networks are structured in a similar manner, and (b) whether the same species traits define the roles of animals across continents., [Location] Afrotropics and Neotropics., [Time period] 1977-2015., [Taxa] Fleshy-fruited plants and frugivorous vertebrates., [Methods] We compiled a dataset comprising 17 Afrotropical and 48 Neotropical weighted seed-dispersal networks quantifying frugivory interactions between 1,091 fleshy-fruited plant and 665 animal species, comprising in total 8,251 interaction links between plants and animals. In addition, we compiled information on the body mass of animals and their degree of frugivory. We compared four standard network-level metrics related to interaction diversity and specialization, accounting for differences related to sampling effort and network location. Furthermore, we tested whether animal traits (body mass, degree of frugivory) differed between continents, whether these traits were related to the network roles of species and whether these relationships varied between continents., [Results] We found significant structural differences in networks between continents. Overall, Neotropical networks were less nested and more specialized than Afrotropical networks. At the species level, a higher body mass and degree of frugivory were associated with an increasing diversity of plant partners. Specialization of frugivores increased with the degree of frugivory, but only in the Neotropics., [Main conclusions] Our findings show that Afrotropical networks have a greater overlap in plant partners among vertebrate frugivores than the more diverse networks in the Neotropics that are characterized by a greater niche partitioning. Hence, the loss of frugivore species could have stronger impacts on ecosystem functioning in the more specialized Neotropical communities compared with the more generalized Afrotropical communities.
- Published
- 2019
32. Leucismo en individuos de Zorzal Colorado (Turdus rufiventris)
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Gomez, Maria Daniela and Ruggera, Román Alberto
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purl.org/becyt/ford/1 [https] ,Ciencias Biológicas ,Otras Ciencias Biológicas ,ABERRACIONES CROMATICAS ,purl.org/becyt/ford/1.6 [https] ,CIENCIAS NATURALES Y EXACTAS - Abstract
Fil: Gomez, Maria Daniela. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina Fil: Ruggera, Román Alberto. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina
- Published
- 2017
33. Front Cover
- Author
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Dugger, Phillip J., primary, Blendinger, Pedro G., additional, Böhning‐Gaese, Katrin, additional, Chama, Lackson, additional, Correia, Marta, additional, Dehling, D. Matthias, additional, Emer, Carine, additional, Farwig, Nina, additional, Fricke, Evan C., additional, Galetti, Mauro, additional, García, Daniel, additional, Grass, Ingo, additional, Heleno, Ruben, additional, Jacomassa, Fábio A. F., additional, Moraes, Suelen, additional, Moran, Catherine, additional, Muñoz, Marcia C., additional, Neuschulz, Eike Lena, additional, Nowak, Larissa, additional, Piratelli, Augusto, additional, Pizo, Marco A., additional, Quitián, Marta, additional, Rogers, Haldre S., additional, Ruggera, Román A., additional, Saavedra, Francisco, additional, Sánchez, Mariano S., additional, Sánchez, Rocío, additional, Santillán, Vinicio, additional, Schabo, Dana G., additional, da Silva, Fernanda Ribeiro, additional, Timóteo, Sérgio, additional, Traveset, Anna, additional, Vollstädt, Maximilian G. R., additional, and Schleuning, Matthias, additional
- Published
- 2019
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- View/download PDF
34. An assessment of the availability of cavities for secondary cavitynesting birds in certified and conventionally-logged Neotropical rainforests.
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Schaaf, Alejandro A., Tallei, Ever, Ruggera, Román A., Vivanco, Constanza G., Rivera, Luis, and Politi, Natalia
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FOREST management ,RAIN forests ,TREE cavities ,SECONDARY forests ,FOREST biodiversity ,FOREST birds ,BIRD populations - Abstract
The high level of forest intervention and the decrease in biodiversity as a result of logging are incentives to implement forest certification schemes. Despite the advances in the results of the impact of forest certification on biodiversity, there are few studies on species with specific habits, such as cavitynesting birds. The objective of this study is to compare the impact of forest certification and conventional logging on the richness, availability (density) and dominance of potentially suitable cavity trees for secondary cavity-nesting birds in the subtropical forests of northwestern Argentina. Seven sites were selected: three control sites which were not logged for at least 40 years, one site under Forest Stewardship Council (FSC) certification, and three sites with conventional logging. The results suggest that logged forests under FSC-certification may guarantee a diversity, availability (density) and dominance of potentially suitable cavity trees for secondary cavity-nesting birds, as well as certain characteristics (such as DBH > 40 cm), similar to unlogged forests for this group of birds. Therefore, we suggest that the forests of northwestern Argentina should be managed by a scheme under forest certification so that the high levels of cavity tree species are maintained. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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35. Seed‐dispersal networks are more specialized in the Neotropics than in the Afrotropics
- Author
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Dugger, Phillip J., primary, Blendinger, Pedro G., additional, Böhning‐Gaese, Katrin, additional, Chama, Lackson, additional, Correia, Marta, additional, Dehling, D. Matthias, additional, Emer, Carine, additional, Farwig, Nina, additional, Fricke, Evan C., additional, Galetti, Mauro, additional, García, Daniel, additional, Grass, Ingo, additional, Heleno, Ruben, additional, Jacomassa, Fábio A. F., additional, Moraes, Suelen, additional, Moran, Catherine, additional, Muñoz, Marcia C., additional, Neuschulz, Eike Lena, additional, Nowak, Larissa, additional, Piratelli, Augusto, additional, Pizo, Marco A., additional, Quitián, Marta, additional, Rogers, Haldre S., additional, Ruggera, Román A., additional, Saavedra, Francisco, additional, Sánchez, Mariano S., additional, Sánchez, Rocío, additional, Santillán, Vinicio, additional, Schabo, Dana G., additional, da Silva, Fernanda Ribeiro, additional, Timóteo, Sérgio, additional, Traveset, Anna, additional, Vollstädt, Maximilian G. R., additional, and Schleuning, Matthias, additional
- Published
- 2018
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36. Reproductive parameters of the turquoise-fronted parrot (Amazona aestiva) in the dry Chaco forest
- Author
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Berkunsky, Igor, Segura, Luciano Noel, Ruggera, Román A., Faegre, Sarah I. K., Trofino Falasco, Clara, López, Fernando G., Velasco, Melina Alicia, Kacoliris, Federico Pablo, Aramburú, Rosana Mariel, and Reboreda, Juan C.
- Subjects
Chaco ,Blue-fronted parrot ,embryonic structures ,Breeding ecology ,Argentina ,Ciencias Naturales ,Trade ,reproductive and urinary physiology ,Psittaciformes - Abstract
The progressive exploitation and destruction of nesting habitat in recent years, combined with the substantial pressure from legal and illegal removal of wild nestlings and adults, justifies the development of a comprehensive study on the reproductive biology of the Turquoise-fronted Parrot (Amazona aestiva). We analyzed breeding parameters in a wild protected population of Turquoise-fronted Parrots in the Chaco forest, Argentina, examining variation among years, over the course of the breeding season, and in relation to the age of the nest. Mean clutch-size per nesting attempt was 3.68 eggs. Hatching success (proportion of eggs laid that hatch) was 0.73. Fledging success (proportion of nestlings that fledge) was 0.88. The overall breeding success (mean number of fledglings per laying female per year) was 0.95. Clutch size did not vary among years but it decreased with the delay of the nest initiation date. Hatching failure was the greatest cause of egg partial losses, and brood reduction was the main cause of nestling partial loses. Brood reduction was positively correlated with clutch size and with egg-laying date. We did not find interannual variation in any of the clutch or brood size variables. Our results showed that the population of Turquoise-fronted Parrots in the dry Chaco forest has high values of clutch size and nestling survival, and low values of hatching success. However, some aspects of the breeding biology need more attention, especially if the species continues to be harvested., L'exploitation et la destruction progressives de l'habitat de nidification advenues ces récentes années, combinées à la pression élevée de captures légale et illégale d'oisillons et d'adultes sauvages, justifient la mise en place d'une étude globale sur la biologie de reproduction de l'Amazone à front bleu (Amazona aestiva). Nous avons analysé les paramètres de reproduction d'une population sauvage protégée de cette amazone dans la forêt du Chaco, en Argentine, examinant les variations interannuelles, tout au long de la saison de reproduction, en relation avec l'âge du nid. La taille moyenne de la ponte par tentative de nidification était de 3,68 oeufs. Le succès d'éclosion (proportion d'oeufs pondus qui ont éclos) était de 0,73. Le succès à l'envol (proportion de jeunes qui ont pris leur envol) était de 0,88. Le succès de nidification d'ensemble (nombre moyen de jeunes à l'envol par femelle nicheuse par année) était de 0,95. La taille de la ponte n'a pas varié d'une année à l'autre, mais était plus faible lorsque la date d'initiation du nid était retardée. L'échec de l'éclosion était la cause la plus importante de perte partielle d'oeufs et une couvée réduite était la cause principale de perte partielle d'oisillons. La couvée réduite était positivement corrélée avec la taille de la ponte et la date de celle-ci. Nous n'avons pas observé de variations interannuelles des variables relatives à la taille de la ponte ou de la couvée. Nos résultats indiquent que la population de l'Amazone à front bleu de la forêt sèche du Chaco montre des valeurs élevées de la taille de ponte et de la survie des oisillons, mais des valeurs faibles du succès d'éclosion. Néanmoins, nous pensons qu'il serait important de se pencher davantage sur certains éléments de la biologie de reproduction de l'espèce, particulièrement si elle continue d'être prélevée., Facultad de Ciencias Naturales y Museo
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- 2017
37. Bird assemblages of riparian forests of premontane forests in northwestern Argentina
- Author
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Gomez, Maria Daniela, Rivera, Luis Osvaldo, Politi, Natalia, and Ruggera, Román Alberto
- Subjects
purl.org/becyt/ford/1 [https] ,Ciencias Biológicas ,Otras Ciencias Biológicas ,Bosques riparios ,Gremios de alimentacion ,Bosques pedemonanos ,Comunidad de aves ,purl.org/becyt/ford/1.6 [https] ,CIENCIAS NATURALES Y EXACTAS - Abstract
Los bosques de ribera usualmente hacen referencia a un cuerpo de agua y su bosque asociado, y represen‐ tan una zona de transición entre el ambiente acuático y el entorno. Estos bosques, constituyen hábitats particulares que proveen sitios de alimentación y reproducción, y rutas de paso para numerosas especies. En general, albergan una rica y abundante fauna en comparación con los ambientes no ribereños circundantes. Las aves constituyen un grupo conspicuo en los bosques de ribera, tanto en regiones templadas como tropicales y frecuentemente los ensam‐ bles son diferentes y de mayor riqueza específica que los de áreas vecinas. En este estudio examinamos en detalle la diversidad de los ensambles de aves en seis bosques de ribera de la selva pedemontana del noroeste de la Argentina (Yungas Australes) y comparamos la riqueza y abundancia de las aves entre la temporada seca y húmeda. Encontra‐ mos un total de 207 especies de aves. Las especies migratorias latitudinales y altitudinales representaron el 15% y 9% de las especies de aves, respectivamente. Los ensambles de aves entre las temporadas seca y húmeda fueron signifi‐ cativamente diferentes (ANOSIM: R = 0,32, p = 0,02) si bien estas diferencias fueron moderadas. El 30% de las 56 espe‐ cies que más contribuyeron a esta diferenciación fueron aves migratorias. El gremio trófico más representativo fue el de las aves insectívoras, seguido de las granívoras. Los bosques de ribera estuvieron dominados por especies de aves que típicamente habitan bosques maduros de las Yungas Australes. Registramos una especie clasificada globalmente como “Casi Amenazada” y cuatro especies consideradas Amenazadas a escala nacional. Este trabajo resalta la impor‐ tancia de los bosques de ribera en su rol como refugio tanto para las especies de aves migratorias como residentes, contribuyendo a la diversidad regional. Riparian forests usually refer to a water‐body and its associated forest, and represent a transitional zone between the aquatic environment and the surrounding area. These forests are singular habitats that provide feeding and breeding sites as well as migration routes for many species. Usually, the fauna found in riparian forests is more diverse and abundant than in surrounding, non‐riparian habitats. Birds are a conspicuous group in riparian forests, both in temper‐ ate and tropical regions, and they often form very distinctive assemblages compared to neighboring areas. In this study, we examined in detail the diversity of bird assemblages at six riparian forests within the piedmont of a subtrop‐ ical montane forest from NW Argentina (Southern Yungas), assessing their richness and abundance in the wet and dry seasons. We found a total of 207 bird species. Latitudinal and altitudinal migrants represented 15% and 9% of species, respectively. Birds assemblages in the wet and dry seasons were significantly different (ANOSIM: R = 0.32, p = 0.02) although differences were relatively small. Thirty percent of the 56 species that contribute most to this difference were migratory birds. Insectivorous birds, followed by granivorous birds, were the best represented trophic guilds. Riparian forests were dominated by bird species that typically occur in undisturbed, mature forests of the Southern Yungas. We recorded one species classified as “Near Threatened” at a global scale, and four species considered “Threatened” at a national scale. This study points out the importance of riparian forests as refuges for migratory as well as resident bird species, which can be crucial for the maintenance of the regional bird diversity. Fil: Gomez, Maria Daniela. Universidad Nacional de Jujuy. Facultad de Ciencias Agrarias. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET - Salta. San Salvador de Jujuy; Argentina Fil: Rivera, Luis Osvaldo. Universidad Nacional de Jujuy. Facultad de Ciencias Agrarias. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET - Salta. San Salvador de Jujuy; Argentina Fil: Politi, Natalia. Universidad Nacional de Jujuy. Facultad de Ciencias Agrarias. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET - Salta. San Salvador de Jujuy; Argentina Fil: Ruggera, Román Alberto. Universidad Nacional de Jujuy. Facultad de Ciencias Agrarias. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET - Salta. San Salvador de Jujuy; Argentina
- Published
- 2016
38. Reproductive parameters of the Turquoise-fronted Parrot (Amazona aestiva) in the dry Chaco forest
- Author
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Berkunsky, Igor, primary, Segura, Luciano N., additional, Ruggera, Román A., additional, Faegre, Sarah I. K., additional, Trofino-Falasco, Clara, additional, López, Fernando G., additional, Velasco, Melina A., additional, Kacoliris, Federico P., additional, Aramburú, Rosana M., additional, and Reboreda, Juan C., additional
- Published
- 2017
- Full Text
- View/download PDF
39. Nest Survival and Predation in Blue-Fronted ParrotsAmazona aestiva: Effects of Nesting Behaviour and Cavity Characteristics
- Author
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Berkunsky, Igor, primary, Segura, Luciano N., additional, Aramburú, Rosana M., additional, Ruggera, Román A., additional, Svagelj, Walter S., additional, and Reboreda, Juan C., additional
- Published
- 2016
- Full Text
- View/download PDF
40. Exploring nest webs in more detail to improve forest management
- Author
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Ruggera, Román A., primary, Schaaf, Alejandro A., additional, Vivanco, Constanza G., additional, Politi, Natalia, additional, and Rivera, Luis O., additional
- Published
- 2016
- Full Text
- View/download PDF
41. Major threats to Turquoise-fronted Amazon’s conservation in the Impenetrable region, Argentina
- Author
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Berkunsky, Igor, Ruggera, Román A., Aramburú, Rosana, and Reboreda, Juan Carlos
- Subjects
Chaco ,extracción de pichones ,poaching ,conservation ,conservación ,parrots ,loros - Abstract
Las principales causas de la declinación de las poblaciones de Loro Hablador (Amazona aestiva) son la destrucción del hábitat y la explotación para el comercio de aves silvestres. La deforestación y la tala selectiva resultan en pérdida de hábitat. La extracción de pichones reduce el número de individuos y puede reducir el número de cavidades disponibles para nidificar. Se evaluaron las principales amenazas que enfrenta el Loro Hablador en la región del Impenetrable, en Argentina. Se estimaron las pérdidas de cavidades por deforestación, tala selectiva y extracción de pichones. Se analizó si la extracción de pichones y la reparación de las cavidades afectan la probabilidad de reutilización de las mismas. Se estimó si la extracción de pichones afecta la supervivencia de los nidos. La deforestación y la tala selectiva destruyeron por año casi 20000 cavidades potenciales. La extracción de pichones afectó en promedio 486 nidos cada año y en los casos en que la cavidad fue reparada no afectó su probabilidad de reutilización al año siguiente. La mayoría de las nidadas sujetas a extracción tenían tres (68%) o dos (23%) pichones y se extrajeron todos menos un pichón. En promedio se extrajeron 1.6 pichones de 40 días de edad por nido. En el 83% de los casos el pichón que se dejó en el nido fue el más joven. Los nidos con extracción de pichones tuvieron una supervivencia menor a los que no tuvieron extracción (73 vs. 93%). Major causes of Turquoise-fronted Amazon’s population decline include habitat destruction and capture for the pet trade. Deforestation and selective logging result in habitat loss. The extraction of chicks reduces the number of individuals and can reduce the number of available cavities for nesting. We evaluated the main threats that this parrot is facing in the Impenetrable region, Argentina. We estimated loss of cavities by deforestation, selective logging and poaching. We analyzed if chicks’ removal and cavity repair affects the probability that a cavity is reoccupied. We estimated if chicks’ removal affects nest survival. Deforestation and selective logging destroyed almost 20000 potential cavities per year. On average, chick’s removal occurs in 486 nests every year. The probability of reoccupation was not affected by chick removal in those cases where the cavity was properly repaired. Most of nest exposed to removal had three (68%) or two (23%) chicks and in all cases were removed all except one chick per nest. In average 1.6 40-days old chicks were removed per nest. At 83% of cases the youngest chick was left at the nest. Nests subjected to extraction have a lower survival than non-extracted nests (73 vs. 93%).
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- 2012
42. Nest predation by arboreal snakes on cavity nesting-birds in dry Chaco woodlands
- Author
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Berkunsky, Igor, Kacoliris, Federico Pablo, Faegre, Sara I. K., Ruggera, Román Alberto, Carrera, Joaquín Daniel, and Aramburu, Rosana Mariel
- Subjects
Narrow-billed woodcreeper ,Cavity nesting ,Furnarius cristatus ,Blue crowned parakeet ,Nest predation ,Otras Ciencias Biológicas ,Lepidocolaptes angustifrons ,Crested hornero ,Amazona aestiva ,Blue fronted parrot ,Aratinga acuticaudata ,Ciencias Biológicas ,purl.org/becyt/ford/1 [https] ,Zoología ,Arboreal snakes ,purl.org/becyt/ford/1.6 [https] ,CIENCIAS NATURALES Y EXACTAS - Abstract
Ornithologists have extensively studied nest predation because predators are responsible for most nest failures (Ricklefs 1969, Martin 1995, Newton 1998). Factors correlated with variation in the occurrence of predation on Neotropical birds have been intensively studied and documented, but identity of predators has largely remained unknown (Larivièreon factors affecting nest success and to understand the dynamics of predator-prey relationships (Benson et al. 2010). When predators have been documented, 1999, Lahti 2009). Knowledge of the identity of predators is often necessary to accurately focus conservation efforts for threatened species as well as to interpret results of research, Facultad de Ciencias Naturales y Museo
- Published
- 2011
43. Cultivar la observación
- Author
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Berkunsky, Igor, primary and Ruggera, Román, additional
- Published
- 2015
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- View/download PDF
44. Linking structure and functionality in mutualistic networks: do core frugivores disperse more seeds than peripheral species?
- Author
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Ruggera, Román A., primary, Blendinger, Pedro G., additional, Gomez, M. Daniela, additional, and Marshak, Charlie, additional
- Published
- 2015
- Full Text
- View/download PDF
45. Nutrients in fruits as determinants of resource tracking by birds
- Author
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Blendinger, Pedro G., primary, Giannini, Norberto P., additional, Zampini, Iris C., additional, Ordoñez, Roxana, additional, Torres, Sebastián, additional, Sayago, Jorge E., additional, Ruggera, Román A., additional, and Isla, María Inés, additional
- Published
- 2015
- Full Text
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46. Frugivory and seed dispersal role of the Yellow-striped Brush-Finch (Atlapetes citrinellus), an endemic emberizid of Argentina
- Author
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Ruggera, Román A., primary, Gomez, M. Daniela, additional, and Blendinger, Pedro G., additional
- Published
- 2014
- Full Text
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47. Nest Survival and Predation in Blue-Fronted Parrots Amazona aestiva: Effects of Nesting Behaviour and Cavity Characteristics.
- Author
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Berkunsky, Igor, Segura, Luciano N., Arambur, Rosana M., Ruggera, Román A., Svagelj, Walter S., and Reboreda, Juan C.
- Abstract
In this study we analyse factors affecting nest survival in Blue-fronted Parrots Amazona aestiva breeding in the Chaco region of northern Argentina. We combined temporal and environmental variables in order to determine which best explain variation in overall nest survival and in predation dependent nest survival. We predicted that high and deep cavities, that are inaccessible to snakes and other predators, would have high daily survival rates. We compared the relative effects on nest survival of time of the breeding season, stage of the nesting cycle, and characteristics of the nest cavity. We modelled daily survival rate (DSR) for all observed nests, and daily survival rate for nests that had been predated (daily survival rate in relation to predation exclusively, DSR
p ). Nest predation accounted for 50% of nest failures. DSR was on average 0.989, translating into an apparent hatching success of 0.39. DSR decreased with time of breeding and increased with nest age. DSRp decreased with time of breeding and inclination of the nest cavity entrance hole and increased with height from the ground of the entrance hole. There was a quadratic effect of nest age on DSRp , such that daily survival was highest during incubation, lowest at hatching and the early nestling stage, but increasing throughout the remainder of the nestling stage. This effect became more pronounced as the breeding season advanced. Year and observer effects did not affect the probability of survival. Temporal patterns and characteristics of the nest cavity explained most of the variation in nest survival in Blue-fronted Parrots, which highlights the relevance of including these covariates in future studies of nest survival in parrots, and has important management and conservation implications. [ABSTRACT FROM AUTHOR]- Published
- 2016
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48. Principales amenazas para la conservación del Loro Hablador (Amazona aestiva) en la región del Impenetrable, Argentina
- Author
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Berkunsky, Igor, primary, Ruggera, Román A., additional, Aramburú, Rosana, additional, and Reboreda, Juan Carlos, additional
- Published
- 2012
- Full Text
- View/download PDF
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