Blooms of Trichodesmium erythraeum and T. thiebautii (Cyanobacteria, Oscillatoriales) in the Bahía de la Paz, Gulf of California

Abstract

Samples of seven Trichodesmium blooms were made in the Bay of La Paz between 2005 and 2011. Trichodesmium erythraeum and T. thiebautii were the responsible species; is last species is recorded for the first time in the Gulf of California. Blooms of T. erythraeum presented concentrations between 0.75 and 4.5 × 106 cells L – 1 while Trichodesmium thiebautii reached densities between 1.86 and 2.34 × 106 cells L – 1. The blooms occurred within a temperature range of 20 and 30 ° C and did not cause any negative effect on the marine biota of area.