SEASONAL RICHNESS AND ABUNDANCE OF ANATIDAES IN THE FLOODED PLAIN, IN THE BRAZILIAN PAMPA

• DOI: 10.22533/at.ed.813222216039

• Palavras-chave: Seasonality, Marrecas, Vacacaí River, Rio Grande do Sul

• Keywords: Seasonality, Marrecas, Vacacaí River, Rio Grande do Sul

• Abstract:

  The study was carried out in a flooded plain in the Vacacaí River floodplain, in the municipality of Santa Margarida do Sul, located in the South Center of the state of Rio Grande do Sul. Monitoring took place in two periods, determined as the hot season, between the months of October 2020 and March 2021, and as the cold season, between the months of May and September 2021. A total of 13 species of the Anatidae family were recorded, totaling 61.9% of the species of the family recorded in the state of Rio Grande do Sul. These species belong to 3 subfamilies of 10 different genera, with the subfamily Anatinae being the richest in species and the subfamily Dendrocygninae the most abundant. The species of the genus correspond to this subfamily: Dendrocygna, which presented itself as the richest genus with three species, followed by the genus Anas, with two species. Thus, the relevant number of species recorded, the expressive abundance and the seasonal movement of the species, show that the wetlands of the Vacacaí River floodplain are an important ecoregion for the Anatidae family, as they offer resources throughout the year for the resident species, as well as presenting important resting areas for species that arrive from migration, as well as for rare and uncommon species in Rio Grande do Sul, being a fundamental area for the conservation of these birds in the Brazilian Pampa.

• Número de páginas: 15