Consulta: creatorFacets:"Gianuca,Andros T."
Registros recuperados: 2
Data/hora: 10/06/2024 15:24:21

Abundance, breeding and food of the Little Blue Heron Egretta caerulea (Aves, Ardeidae) in the Patos Lagoon estuary, a recently colonized area in southern Brazil
Provedor de dados: 76
Autores: Gianuca,Dimas; Gianuca,Andros T.; Vooren,Carolus M.
We document the expansion of the breeding distribution of the Little Blue Heron Egretta caerulea (Linnaeus, 1758) to 850 km beyond its previous southern limit in South America. In addition we present data on abundance, breeding biology and food of the species in the Patos Lagoon estuary, the area which the species recently colonized. The maximum abundance recorded in the breeding colony and in a nocturnal roosting site was 53 and 49 individuals respectively. Nesting occurred from September to March. Birds nested in a mixed breeding colony together with about 3,000 breeding pairs of seven other species of Pelecaniformes, in a swampy forest near the margin of the estuary. Five nests were between 1.5 and 4.3 m from the ground, on the shrub Daphnopsis racemosa...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Climate change; Herons; Reproduction; Rio Grande do Sul; Range expansion.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000100003

Bird-habitat associations in coastal rangelands of southern Brazil
Provedor de dados: 76
Autores: Dias,Rafael A.; Bastazini,Vinicius A. G.; Gianuca,Andros T.
Nearly all remnants of temperate grasslands in southeastern South America are used for livestock ranching and are subject to habitat degradation resulting from this activity. Exploring how habitat features affect the composition of grassland avifaunal communities is a first step to understand how current cattle-ranching management practices impact avian diversity. We used canonical ordination to test for relationships between five habitat variables and the composition of the bird community in coastal grasslands in southern Brazil. We sampled pastures with different heights, from overgrazed short-grass to tall herbaceous vegetation. We recorded 1,535 individuals and 27 species of birds. The first ordination axis indicated a strong contribution of mean...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Habitat use; Livestock ranching; Grassland management; Canonical ordination; "Campos" grasslands.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212014000200010