1. Influence of the Amazon River plume on distributions of free-living and symbiotic cyanobacteria in the western tropical north Atlantic Ocean Foster, R. A.; Subramaniam, Ajit; Mahaffey, C.; Carpenter, E. J.; Capone, D. G.; Zehr, J. P. 2007 Articles CyanobacteriaMarine ecologyBiogeochemistryChemical oceanography