Navegando por Autor "Silva, Cleverton da"
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Item Birds of prey (Accipitriformes and Falconiformes) of Serra de Itabaiana National Park, northeastern Brazil.(2020) Silva, Cleverton da; Azevedo, Cristiano Schetini de; Ruiz-Esparza Aguilar, Juan Manuel; Ribeiro, Adauto de SouzaBirds of prey are important for maintaining ecosystems, since they can regulate the populations of vertebrates and invertebrates. However, anthropic activities, like habitat fragmentation, have been decreasing the number of birds of prey, affecting the habitat ecological relations and, decreasing biodiversity. Our objective was to evaluate species of birds of prey (Accipitriformes and Falconiformes) in a protected area of the Atlantic forest in northeastern Brazil. The area was sampled for 17 months using fixed points and walking along a pre-existing trail. Birds of prey were classified by their Punctual Abundance Index, threat status and forest dependence. Sixteen birds of prey were recorded, being the most common Rupornis magnirostris and Caracara plancus. Most species were considered rare in the area and not dependent of forest vegetation. None of the registered species were threatened with extinction. Our results showed that the studied area presents a considerable diversity of birds of prey, including species sensitive to environmental changes. Thus, it is important to protect this area to increase the availability of feeding and nesting areas for birds of prey.Item Do vegetal communities dominated by invasive exotic plant species affect the structure of bird communities in an Atlantic Forest area?(2020) Silva, Cleverton da; Viana Junior, Arleu Barbosa; Azevedo, Cristiano Schetini de; Fabricante, Juliano RicardoInvasive exotic plants can modify the structure of the environment, producing a cascade of effects on different animal populations, such as birds, which tend to decrease in quantity and diversity of species. The objective of this study was to evaluate how the bird assemblage responds to an invasion by exotic species of plants in an Atlantic Forest area in northeastern Brazil. Data were collected on the richness, abundance, frequency of occurrence, trophic groups, dependence on forest habitats, and conservation status of bird species in two forest areas: one with no invasive plant species and one with a predominance of invasive plant species, mainly trees. The results showed that the presence of invasive exotic vegetation influenced the bird assemblage, and in the area where the invasive exotic species were predominant, the richness and abundance of birds were significantly lower than in the area with natural vegetation. In addition, the composition of the bird assemblage was significantly different in areas where exotic plant species prevailed, with no species dependent on forest habitats or threatened with extinction. We concluded that the habitat dominated by invasive exotic plants modified the local bird assemblage. Thus, the control and management of alien plant species must be undertaken.Item Hunting and trade of Columbidae in Northeast Brazil.(2021) Silva, Cleverton da; Ruiz Esparza Aguilar, Juan Manuel; Azevedo, Cristiano Schetini de; Ribeiro, Adauto de Souza