Offshore distribution patterns of the cyanobacterium Trichodesmium erythraeum ehrenberg and associated phyto- and bacterioplankton in the southern Atlantic coast (Paraná, Brazil)

Studies were carried out on Thrichodesmium erythraeum occurring on the inner shelf in the state of Paraná, Brazil. Temperature, salinity, rainfall, wind velocity, total bacteria, bacterial biomass, chlorophyll-a, phytoplankton, Anabaena sp., Merismopedia sp. and T. erythraeum densities were measured in surface water. Centric and pennate diatoms, Anabaena sp. and Merismopedia sp. were most abundant at 15 m isobath, while dinoflagellate abundance was relatively constant among stations. Similarly, total bacterial densities were relatively homogeneous throughout the sampling area, suggesting that blooms of T. erythraeum were not yet in the senescent phase. Results showed that T. erythraeum was capable of surviving in relatively inhospitable environmental conditions, due to its ability to fix nitrogen and to photosynthesis at high light intensities.

Bibliographic Details

Main Authors:	Siqueira,Adriana, Kolm,Hedda Elisabeth, Brandini,Frederico Pereira
Format:	Digital revista
Language:	English
Published:	Instituto de Tecnologia do Paraná - Tecpar 2006
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000300018
Tags:	Add Tag No Tags, Be the first to tag this record!