Data/hora: 05/06/2024 07:22:07

Provedor de dados: | 104
País: | Brazil
Título: | Vertical distribution of zooplankton in the water column of Lago Amapá, Rio Branco, Acre, Brazil
Autores: | Keppeler,Erlei Cassiano; Hardy,Elsa Rodrigues.
Data: | 2004-06-01
Ano: | 2004
Palavras-chave: | Floodplain; Intermediate disturbance hypothesis; Zooplankton species.
Resumo: | The aim of investigation was to study the model of vertical distribution in Lago Amapá, taking into consideration the seasonality of its zooplanktonic composition. Lago Amapá (10º2'36"S and 67º50'24"W) is located in the floodplain of the Rio Acre. Samplings were conducted at three different depths of the water column, to study the vertical distribution of zooplankton populations and determine some physico-chemical and biological parameters of Lago Amapá. Weekly samples were taken with a Van Dorn sampler. The species showed greater concentrations at the by means of water column. Thirty-eight zooplankton species were found in the samples represented by Rotifera (30), Cladocera (5) and Cyclopoida (3). The temperature of the water column showed a tendency toward relatively high values (about 30ºC) with little variation, consequently resulting in low viscosity. Based of Jaccard's index, it was seen that during the low-water phase, S1 and S3 of the three sampling stations studied, had greater similarity (Cj = 0.7058) in the middle of the water column. Lago Amapá showed characteristics in line with the intermediate disturbance hypothesis model, favoring colonization by opportunistic species such as rotifers.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752004000200002
Editor: | Sociedade Brasileira de Zoologia
Relação: | 10.1590/S0101-81752004000200002
Formato: | text/html
Fonte: | Revista Brasileira de Zoologia  v.21 n.2 2004
Fonte: | info:eu-repo/semantics/openAccess