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Provedor de dados:  BABT
País:  Brazil
Título:  Effects of limnological and morphometric factors upon Zmin, Zmax and width of Egeria spp stands in a tropical reservoir
Autores:  Pierini,Sandra Andréa
Thomaz,Sidinei Magela
Data:  2009-04-01
Ano:  2009
Palavras-chave:  Egeria
Fetch
Littoral slope
Secchi disk
Resumo:  In this work, regression analyses were used to test the effects of fetch, littoral slope and Secchi disk depth upon the stand width (Wi) and maximum (Zmax) and minimum (Zmin) colonization depths of Egeria spp in a large tropical reservoir (Rosana Reservoir). Littoral slope was the only variable correlated with Wi, which was larger in locations with lower slopes. The higher Wi values (up to 260m) were found in locations where slopes were lower than 0.05 m.m-1. Zmin and Zmax were correlated positively with fetch. Nevertheless, different relationships were found at lower and higher fetch values observed in the arms and in the main body of the reservoir, respectively. At lower values, Secchi disk depth was the main variable explaining Egeria Zmax. On the other hand, in locations where fetch was longer (i.e. in the main axis of the reservoir), it was the only variable that explained Zmax significantly. Despite the great variability, the results indicated that the measured limnological (Secchi disk) and morphometric (fetch and slope) variables were important determinants of Egeria spp colonization in the Rosana Reservoir.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Identificador:  http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000200016
Editor:  Instituto de Tecnologia do Paraná - Tecpar
Relação:  10.1590/S1516-89132009000200016
Formato:  text/html
Fonte:  Brazilian Archives of Biology and Technology v.52 n.2 2009
Direitos:  info:eu-repo/semantics/openAccess
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