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URI permanente para esta coleçãohttps://bdc.icmbio.gov.br/handle/cecav/1412
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Item Remaining suitable areas for the critically endangered Brazilian Merganser (Mergus octosetaceus; Aves, Anseriformes) are threatened by hydroelectric power plants(Perspectives in Ecology and Conservation, 2021) Bovo, Alex Augusto Abreu; Ferraz, Katia Maria P. M. de Barros; Ribeiro, Flávia; Lins, Lívia Vanucci; Barbosa, Marcelo de Oliveira; Previdente, Fernando Henrique; Disconzi, Gislaine M.S.; Sebaio, Fabiane; Antas, Paulo de Tarso Zuquim; Guaraldo, André de Camargo; Resende, Alexandre; Lagos, Adriano Rodrigues; Barbosa, Antônio Eduardo Araujo; Silveira, Luís FábioThe critically endangered Brazilian Merganser Mergus octosetaceus is one of the rarest waterfowls in the world. Only three isolated populations remain in the Brazilian Cerrado, totaling less than 250 individuals. We evaluated the potential influence of small hydroelectric plants (SHPs) and ProtectedAreas (PAs) on the species conservation. We identified suitable areas by using recent presence records and environmental predictors, and overlapped it with the species dispersion zone and the SHP impact zone. Suitable areas for the species are limited to 4% of the geographic space (142,899 km2). Within the dispersion zone, we found 36 planned SHPs, which can impact 4.1% of the suitable area and 17.2% of the suitable area inside PAs. Our results expose the critical situation of the Brazilian Merganser, with few isolated suitable areas, high potential impacts for the three known populations, and a high proportion of suitable areas out of PAs. We highlight the need of considering SHPs impacts on the Brazilian Merganser in environmental impact assessment studies to reduce them. Furthermore, we appointed areas for search of new populations, and emphasize how urgent the implementation of effective conservation actions aiming to protect the remaining suitable habitats for the Brazilian Merganser is.Item An overview of migratory birds in Brazil(Papéis Avulsos de Zoologia, 2018) Somenzari, Marina; Amaral, Priscilla Prudente do; Cueto, Victor R.; Guaraldo, André de Camargo; Jahn, Alex E.; Lima, Diego Mendes; Lima, Pedro Cerqueira; Lugarini, Camile; Machado, Caio Graco; Martinez, Jaime; Nascimento, João Luiz Xavier do; Pacheco, José Fernando; Paludo, Danielle; Prestes, Nêmora Pauletti; Serafini, Patrícia Pereira; Silveira, Luís Fábio; Sousa, Antônio Emanuel B. A. de; Sousa, Nathália Alves de; Souza, Manuella Andrade de; Telino-Júnior, Wallace Rodrigues; Whitney, Bret MyersWe reviewed the occurrences and distributional patterns of migratory species of birds in Brazil. A species was classi fied as migratory when at least part of its population performs cyclical, seasonal movements with high fidelity to its breeding grounds. Of the 1,919 species of birds recorded in Brazil, 198 (10.3%) are migratory. Of these, 127 (64%) were classified as Migratory and 71 (36%) as Partially Migratory. A few species (83; 4.3%) were classified as Vagrant and eight (0,4%) species could not be defined due to limited information available, or due to conflicting data.