Metagenomic Analysis of Cyanobacteria in an Oligotrophic Tropical Estuary, South Atlantic.

This study assessed the species composition, distribution, and functional profiles of cyanobacteria in Camamu Bay, a tropical oligotrophic estuarine system on the northeast coast of Brazil, using shotgun metagenomic sequencing. Surface-water samples were evaluated in two different rainfall periods (rainy and dry seasons), at nine stations in the three hydrodynamic regions of the bay. At a fixed sampling station, on each season, samples were taken over a tidal cycle at 3-h intervals over 12 h.

Neolyngbya gen. nov. (Cyanobacteria, Oscillatoriaceae): A new filamentous benthic marine taxon widely distributed along the Brazilian coast.

Brazil has an extensive and environmentally diverse coastline, which favors the occurrence of numerous cyanobacterial morpho- and ecotypes. Nevertheless, this coastline is still poorly studied and its diversity is underestimated. Considering the family Oscillatoriaceae, Lyngbya deserves special attention.

Structure of macroalgal communities on tropical rocky shores inside and outside a marine protected area.

The structure of marine macroalgal communities and morpho-functional groups were investigated in a poorly characterized region on the Tropical Southwestern Atlantic coast, Brazil. The survey was conducted at six rocky shores located on the mainland and on coastal islands distributed inside a marine protected area (MPA) and outside the MPA (near a densely populated area). We hypothesized that tropical rocky shores inside the MPA and islands have higher species richness, diversity, and evenness of marine macroalgae.

MORPHOLOGICAL AND ULTRASTRUCTURAL FEATURES OF A STRAIN OF BOTRYOCOCCUS TERRIBILIS (TREBOUXIOPHYCEAE) FROM BRAZIL(1).

The genus Botryococcus comprises a group of cosmopolitan species of freshwater colonial green algae, some of which synthesize and accumulate an unusually high level (15-76%) of liquid hydrocarbons. This characteristic suggests the possibility of exploiting species from this group as renewable sources for jet fuel. An oil-rich strain of Botryococcus (Trebouxiophyceae) was isolated from a freshwater pond in the state of Bahia, Brazil, and is presently maintained under standard conditions at the Culture Collection of the Institute of Biology, Federal University of Bahia.