Abstract
Floristic survey of flagellate green algae (Chlorophyceae and Prasinophyceae) from four water bodies in the state of Rio de Janeiro, southeast Brazil. Samples were collected bimonthly from September 1988 to August 1991. Thirty-five taxa of which 31 in Chlorophyceae (24 Chlamydomonadales and seven Volvocales) and four in Prasinophyceae (Polyblepharidales) were identified. Twenty-three taxa are new records for Brazil and 31 are registered for the first time for Rio de Janeiro State. On basis of cell shape, location of the nucleus and degree of longitudinal striations on the chloroplast surface a new combination, Vitreochlamys lefevrei (Bourr.) Menezes & C. Bicudo, is proposed. Integrating studies among morphological analysis on natural/cultured material and characterizing of reproduction/life cycle as well the correlating between the occurrence of the species and environmental conditions are needed in order to better knowledge the degree of phenotypic plasticity within the members of the flagellate green algae in the country.
Highlights
Few floristic and taxonomic investigations have been carried out on the pigmented flagellate algae in Brazilian freshwater systems. Information concerning these algae is dispersed in general floristicsurveys and plankton studied ecology
The paper is aimed at increasing knowledge of the flagellate algal flora from tropical Brazil, and includes critical taxonomic remarks on several taxa, information about species composition of each system, as well as notes on the ecology and geographical distribution of each group
All water bodies investigated are located in the southern part of the municipality of Rio de Janeiro, state of Rio de Janeiro, southeast Brazil
Summary
Few floristic and taxonomic investigations have been carried out on the pigmented flagellate algae in Brazilian freshwater systems Information concerning these algae is dispersed in general floristicsurveys and plankton studied ecology. Despite of being just a few, such studies have shown there to be a very rich and interesting Brazilian flagellate algal flora, especially in the tropical part of the country Some of the latter publications include descriptions of new taxa (Castro et al 1991, Conforti 1993a, b, 1994, Menezes 1996, Menezes & Huszar 1997). The paper is aimed at increasing knowledge of the flagellate algal flora from tropical Brazil, and includes critical taxonomic remarks on several taxa, information about species composition of each system, as well as notes on the ecology and geographical distribution of each group
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