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Tipo do documento: Artigo
Título: Hydroelectric dams: the first responses from giant otters to a changing environment
Autor: Calaça, Ana
Faedo, Odair José
Melo, Fabiano Rodrigues de
Resumo: The construction of hydroelectric dams has been cited as one of the threats faced by giant otter populations in their distribution areas. However, studies evaluating the impact of reservoirs on these populations are scarce and often restricted to results about the post-filling period. In this study, we present distribution and behavioral data from giant otter populations living in the Teles Pires River and tributaries, located in the municipality of Paranaíta in the State of Mato Grosso, Brazil, during the pre-filling period. The species showed a homogeneous distribution throughout the sample site during the initial monitoring phase; this distribution changed to sparse after the beginning of the work to remove the riparian vegetation, possibly because of intense noise and movement of people. However, otters returned during other campaigns, rebuilding destroyed dens and building new ones in recently exposed bounds, indicating a possible adaptation to the first environmental filter promoted by the project: the structural change of the environment. Two other subsequent important filters challenging the species survival are related to the loss of habitat with the rise of water levels and changes in the composition and abundance of food resources. These factors are being monitored since the filling of the Teles Pires reservoir, beginning in December of 2014, for future comparisons between the two periods.
Palavras-chave: Habitat use
Rydroelectric dams
Environmental filter
Pteronura brasiliensis
País: Outros
Unidade acadêmica: Regional Jataí (RJ)
Citação: CALAÇA, Analice Maria; FAEDO, Odair José; MELO, Fabiano Rodrigues de. Hydroelectric dams: the first responses from giant otters to a changing environment. IUCN Otter Specialist Group Bulletin, Belvaux, v. 32, n. 2, p. 48-58, Jan. 2015.
Tipo de acesso: Acesso Aberto
Data de publicação: Jan-2015
Aparece nas coleções:RJ - Artigos publicados em periódicos

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