Participatory surveillance reveals marsh deer mortality event during an extraordinary flood in Ibera Wetlands, Argentina
Mortality events of marsh deer (Blastocerus dichotomus) have been historically described in the southern margins of its geographical range. Few documented cases show how environmental changes and pathogens interact to trigger mortality scenarios and reveal their causes. Here, using a participatory s...
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
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Wiley
2025
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| Online Access: | http://hdl.handle.net/20.500.12123/21432 https://esajournals.onlinelibrary.wiley.com/doi/full/10.1002/ecs2.70186 https://doi.org/10.1002/ecs2.70186 |
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| author | Orozco, María Marcela Guillemi, Eliana Carolina Minatel, Leonardo Schapira, Andrea Caimi, Karina Cynthia Berra, Yanina Blanco, Paula Di Nucci, Dante Farber, Marisa Diana Fernandez, M. Pilar Argibay, Hernán Darío |
| author_browse | Argibay, Hernán Darío Berra, Yanina Blanco, Paula Caimi, Karina Cynthia Di Nucci, Dante Farber, Marisa Diana Fernandez, M. Pilar Guillemi, Eliana Carolina Minatel, Leonardo Orozco, María Marcela Schapira, Andrea |
| author_facet | Orozco, María Marcela Guillemi, Eliana Carolina Minatel, Leonardo Schapira, Andrea Caimi, Karina Cynthia Berra, Yanina Blanco, Paula Di Nucci, Dante Farber, Marisa Diana Fernandez, M. Pilar Argibay, Hernán Darío |
| author_sort | Orozco, María Marcela |
| collection | INTA Digital |
| description | Mortality events of marsh deer (Blastocerus dichotomus) have been historically described in the southern margins of its geographical range. Few documented cases show how environmental changes and pathogens interact to trigger mortality scenarios and reveal their causes. Here, using a participatory surveillance framework, we document the most extensive marsh deer mortality event observed in the last three decades occurring in Ibera ecoregion, Corrientes, Argentina. Local stakeholders monitored marsh deer disease cases or mortality, and upon detection, emergency response teams conducted extensive field studies, documenting 409 dead marsh deer between May and August 2017. Complete postmortem examinations were performed on 16 deer, revealing hepatic fibrosis associates with Fasciola hepatica and multiple parasite infestations in different tissues. Molecular analysis performed on samples from 82 deer identified parasitic and vector-borne microorganisms, including Anaplasma marginale, Theileria cervi, and Trypanosoma spp. High-tick burden and Trypanosoma spp. were significantly associated with deficient body condition. Concurrently, increased precipitation and watershed height significantly expanded flooded areas, with reduced herbaceous cover indicated by land cover analysis. Our findings suggest that prolonged flooding in Ibera played a critical role in the interactions between habitat availability, marsh deer, and parasites. Environmental stressors likely exacerbated the effects of parasitic infections, highlighting the importance of integrating environmental monitoring with wildlife health assessments. Our results contribute to scientific knowledge that provides tools to enhance management efforts focused on protecting the marsh deer population and its critical habitats. |
| format | info:ar-repo/semantics/artículo |
| id | INTA21432 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | INTA214322025-02-25T11:44:14Z Participatory surveillance reveals marsh deer mortality event during an extraordinary flood in Ibera Wetlands, Argentina Orozco, María Marcela Guillemi, Eliana Carolina Minatel, Leonardo Schapira, Andrea Caimi, Karina Cynthia Berra, Yanina Blanco, Paula Di Nucci, Dante Farber, Marisa Diana Fernandez, M. Pilar Argibay, Hernán Darío Venado Mortalidad Inundación Crecida Tierras Húmedas Deer Mortality Flooding High Water Wetlands Esteros del Iberá Ciervo de los Pantanos Marsh Deer Blastocerus dichotomus Mortality events of marsh deer (Blastocerus dichotomus) have been historically described in the southern margins of its geographical range. Few documented cases show how environmental changes and pathogens interact to trigger mortality scenarios and reveal their causes. Here, using a participatory surveillance framework, we document the most extensive marsh deer mortality event observed in the last three decades occurring in Ibera ecoregion, Corrientes, Argentina. Local stakeholders monitored marsh deer disease cases or mortality, and upon detection, emergency response teams conducted extensive field studies, documenting 409 dead marsh deer between May and August 2017. Complete postmortem examinations were performed on 16 deer, revealing hepatic fibrosis associates with Fasciola hepatica and multiple parasite infestations in different tissues. Molecular analysis performed on samples from 82 deer identified parasitic and vector-borne microorganisms, including Anaplasma marginale, Theileria cervi, and Trypanosoma spp. High-tick burden and Trypanosoma spp. were significantly associated with deficient body condition. Concurrently, increased precipitation and watershed height significantly expanded flooded areas, with reduced herbaceous cover indicated by land cover analysis. Our findings suggest that prolonged flooding in Ibera played a critical role in the interactions between habitat availability, marsh deer, and parasites. Environmental stressors likely exacerbated the effects of parasitic infections, highlighting the importance of integrating environmental monitoring with wildlife health assessments. Our results contribute to scientific knowledge that provides tools to enhance management efforts focused on protecting the marsh deer population and its critical habitats. Instituto de Biotecnología Fil: Orozco, Maria Marcela. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina Fil: Orozco, Maria Marcela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina Fil: Orozco, Maria Marcela. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina Fil: Guillemi, Eliana Carolina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Agrobiotecnología y Biología Molecular; Argentina Fil: Guillemi, Eliana Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Minatel, Leonardo. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Cátedra de Patología; Argentina Fil: Minatel, Leonardo. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Instituto de Investigaciones en Epidemiología Veterinaria; Argentina Fil: Schapira, Andrea. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Cátedra de Patología; Argentina Fil: Schapira, Andrea. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Instituto de Investigaciones en Epidemiología Veterinaria; Argentina Fil: Caimi, Karina Cynthia. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Agrobiotecnología y Biología Molecular; Argentina Fil: Caimi, Karina Cynthia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Berra, Yanina. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Instituto de Investigaciones en Epidemiología Veterinaria; Argentina Fil: Berra, Yanina. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Cátedra de Salud Pública; Argentina Fil: Blanco, Paula. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina Fil: Blanco, Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina Fil: Blanco, Paula. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina Fil: Di Nucci, Dante. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina Fil: Farber, Marisa Diana. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Agrobiotecnología y Biología Molecular; Argentina Fil: Farber, Marisa Diana. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Fernandez, M. Pilar. Washington State University. College of Veterinary Medicine. Paul G. Allen School for Global Health; Estados Unidos Fil: Argibay, Hernán D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina Fil: Argibay, Hernán D. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina Fil: Argibay, Hernán D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina 2025-02-25T11:30:14Z 2025-02-25T11:30:14Z 2025-02 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/21432 https://esajournals.onlinelibrary.wiley.com/doi/full/10.1002/ecs2.70186 2150-8925 2150-8925 https://doi.org/10.1002/ecs2.70186 eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Wiley Ecosphere 16 (2) : e70186. (February 2025) |
| spellingShingle | Venado Mortalidad Inundación Crecida Tierras Húmedas Deer Mortality Flooding High Water Wetlands Esteros del Iberá Ciervo de los Pantanos Marsh Deer Blastocerus dichotomus Orozco, María Marcela Guillemi, Eliana Carolina Minatel, Leonardo Schapira, Andrea Caimi, Karina Cynthia Berra, Yanina Blanco, Paula Di Nucci, Dante Farber, Marisa Diana Fernandez, M. Pilar Argibay, Hernán Darío Participatory surveillance reveals marsh deer mortality event during an extraordinary flood in Ibera Wetlands, Argentina |
| title | Participatory surveillance reveals marsh deer mortality event during an extraordinary flood in Ibera Wetlands, Argentina |
| title_full | Participatory surveillance reveals marsh deer mortality event during an extraordinary flood in Ibera Wetlands, Argentina |
| title_fullStr | Participatory surveillance reveals marsh deer mortality event during an extraordinary flood in Ibera Wetlands, Argentina |
| title_full_unstemmed | Participatory surveillance reveals marsh deer mortality event during an extraordinary flood in Ibera Wetlands, Argentina |
| title_short | Participatory surveillance reveals marsh deer mortality event during an extraordinary flood in Ibera Wetlands, Argentina |
| title_sort | participatory surveillance reveals marsh deer mortality event during an extraordinary flood in ibera wetlands argentina |
| topic | Venado Mortalidad Inundación Crecida Tierras Húmedas Deer Mortality Flooding High Water Wetlands Esteros del Iberá Ciervo de los Pantanos Marsh Deer Blastocerus dichotomus |
| url | http://hdl.handle.net/20.500.12123/21432 https://esajournals.onlinelibrary.wiley.com/doi/full/10.1002/ecs2.70186 https://doi.org/10.1002/ecs2.70186 |
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