TITLE:
Characteristics and Diversity of Cyanobacteria in Periphyton from Lentic Tropical Ecosystem, Brazil
AUTHORS:
Sirlene Aparecida Felisberto, Danúzia Batista da Silva e Souza
KEYWORDS:
Filamentous Cyanophyceae, Reservoir, Goiás State, Taxonomy
JOURNAL NAME:
Advances in Microbiology,
Vol.4 No.15,
November
19,
2014
ABSTRACT: This study aimed to perform the
taxonomic survey of the species of periphytic Cyanobacteria in a lentic
tropical environment, seeking to contribute to the knowledge on biodiversity
and their distribution. This study was conducted at the Samambaia
Reservoir, which is located at Federal University of Goiás, Goiania, Central
West region of Brazil. In general, the water of the Samambaia Reservoir is
characterized as more turbid and the increased biochemical oxygen demand as
well as a higher concentration of coliforms in the rainy season. Twenty six
samples were collected, ten in the dry season (09/2010 and 11/2010; 07/2012)
and ten in the rainy season (01/2011 and 03/2011; 01/2013). Periphyton was
collected from stems of aquatic plants (Cyperaceae), which were in the marginal
area of the reservoir. With the floristic survey, 38 taxa of Cyanobacteria were
identified in periphyton of the Samambaia Reservoir. Phormidium (family
Phormidiaceae) and Aphanocapsa (Merismopediaceae) are among genera with the
highest species richness. Regarding morphological types, many species of
filamentous cyanobacteria were identified, followed by colonial taxa. In
relation to the frequency of occurrence and the seasonal period, 14 taxa were
classified in the rare category, 12 in common category and 12 in constant
category. Regarding the seasonal period, Cyanophyceae were the greatest wealth
in the rainy season (97.4%).