Biodiversidade de cianobactérias e algas das represas Billings (Braço Taquacetuba) e Guarapiranga, SP, Brasil / Biodiversity of Cyanobacteria and Algae in Billings (Braço Taquacetuba) and Guarapiranga Reservoirs, SP, Brazil

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

Biodiversity of planktonic cyanobacteria and algae in two of the greatest reservoirs from the Metropolitan Region of São Paulo (RMSP), Billings and Guarapiranga, which supply water for millions of people was studied. The samples were collected every two months, in a specific site (Sabesps water sourcing) in both reservoirs, from January to December 2004. The samples were filtered using a plankton net (20m) and were preserved with formaldehyde. The studied samples were kept in the Herbarium of the Institute of Botany (SP). Eighty-four taxa were identified, described and illustrated: thirty-six belong to Chlorophyceae (43%); seventeen to Cyanobacteria (20%); thirteen to Euglenophyceae (15.5%); seven to Bacillariophyceae (8.5%); five to Zygnematophyceae (6%); three to Xantophyceae (3.5%); two to Dinophyceae (2.5%) and one to Chrysophyceae (1%). Twenty three taxa were considered as new references to the studied reservoirs and nine potentially toxic species of cyanobacteria were identified. The Sorensen index showed high similarity between the phytoplanktonic floras of both reservoirs.

ASSUNTO(S)

cianobactérias phytoplankton fitoplâncton represa billings billings and guarapiranga reservoirs biodiversidade biodiversity fitoplâncton - represa guarapiranga

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