Bibliographic Detail
Hentschke, G.S. & Torgan, L.C., 2010
Reference:
Hentschke, G.S. & Torgan, L.C. (2010). Desmodesmus e Scenedesmus (Scenedesmaceae,
Sphaeropleales, Chlorophyceae) em ambientes aquáticos na Planície Costeira do Rio Grande do Sul, Brasil. Desmodesmus and Scenedesmus (Scendesmaceae, Sphaeropleales, Chlorophyceae) in aquatic environments from the Coastal Plain of Rio Grande do Sul, Brazil. Rodriguésia 61: 585-601. [in Portuguese]
Notes:
Here are some new combinations on Desmodesmus, including Scenedesmus heteracanthus Desmodesmus granulatus (W. & G.S. West.) Hentschke & Torgan, D. heteracanthus (Guerr.) Hentschke & Torgan, D. microspina (Chod.) Hentschke & Torgan and D. spinoso-aculeolatus (Chod.) Hentschke & Torgan
Abstract:
This study on the Desmodesmus An, Friedl & Hegew. and Scenedesmus Meyen flora was developed in
isolated ponds, interlinked ponds, marshes, dams and lotic environments of the Rio Grande do Sul
Coastal Plain. 41 samples collected in autumn and spring 2003 were analysed. 13 species and three
varieties of Desmodesmus and two species and one variety of Scenedesmus were identified. Four new
combinations were proposed: Desmodesmus granulatus (W. & G.S. West.) Hentschke & Torgan, D.
heteracanthus (Guerr.) Hentschke & Torgan, D. microspina (Chod.) Hentschke & Torgan and D. spinoso-
aculeolatus (Chod.) Hentschke & Torgan. The highest values of richness and density were observed in
samples with lower pH. The average density (ind.mL-1
) of Desmodesmus and Scenedesmus in spring was
significantly higher than in autumn, probably due to higher water temperature and decreased water level,
enabling a higher concentration of organisms.
