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Rodriguésia

Print version ISSN 0370-6583On-line version ISSN 2175-7860

Abstract

AFFE, Helen Michelle de Jesus; SANTOS, Lorena Petersen Nascimento; SANTOS, Márcio Ferreira dos  and  NUNES, José Marcos de Castro. Marine microalgae on the southern coast of Bahia, Brazil: composition and new records of phytoplankton species. Rodriguésia [online]. 2019, vol.70, e03632017.  Epub Oct 03, 2019. ISSN 2175-7860.  http://dx.doi.org/10.1590/2175-7860201970052.

The phytoplankton community is the first link in the aquatic trophic chain and knowledge of its composition is an important tool for ecological characterization; including as potential indicator of anthropic impacts. The southern coast of Bahia is one of the best preserved parts of the Brazilian coast, however, little is known about its biodiversity, especially on marine phycoflora. With the objective of characterizing the composition of microphytoplankton (> 20 µm) in this region, samples were collected by a horizontal dredger using a plankton net (20 µm mesh size) to study the community composition. Water samples were taken from the subsurface using a Van Dorn bottle in order to analyze phytoplanktonic cell concentration. A total of 149 taxa were identified, distributed in the following phyla: Bacillariophyta, Miozoa, Cyanobacteria, Euglenophyta, Haptophyta, and Ochrophyta. Diatoms (63%) and dinoflagellates (26%) were the most representative groups in the specific composition. 43 new taxonomic occurrences were recorded for the coasts of Bahia, Northeastern Brazilian coast, and Brazilian coast.

Keywords : marine phycoflora; microphytoplankton; Bacillariophyta.

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