E. W. Dantas, A. N. Moura, M. C. Bittencourt-Oliveira, J. D. T. Arruda-Neto and A. D. C. Cavalcanti, “Temporal Variation of the Phytoplankton Community at Short Sampling Intervals in the Mundaú Reservoir, Northeastern Brazil,” Acta Botanica Brasilica, Vol. 22, No. 4, 2008, pp. 970-982.

has been cited by the following article:

• TITLE: Increase in Straight and Coiled Cylindrospermopsis raciborskii (Cyanobacteria) Populations under Conditions of Thermal De-Stratification in a Shallow Tropical Reservoir

  AUTHORS: Maria do Carmo Bittencourt-Oliveira, Ariadne do Nascimento Moura, Talita Caroline Hereman, Enio Wocyli Dantas

  KEYWORDS: Cyanophyta, Light, Morphotype, Northeastern Brazil, Mundaú Reservoir

  JOURNAL NAME: Journal of Water Resource and Protection, Vol.3 No.4, March 29, 2011

  ABSTRACT: In recent decades, there have been frequent occurrences of the cyanobacterium Cylindrospermopsis raciborskii in northeastern Brazil. Little is known regarding the response of straight and coiled morphotypes to environmental conditions such as light intensity and water temperature. Samples were collected at the Mundaú reservoir (PE, Brazil) at six sampling depths in the dry and rainy season. Both morphotypes exhibited seasonal and vertical differences in densities. The reservoir was stratified in the dry season, with a predominance of the straight morphotype. The coiled morphotype exhibited greater densities in the lower strata and prove to be more susceptible to light. There was evident thermal de-stratification in the rainy season, with a predominance of the coiled morphotype in the surface layers. Thermal de-stratification favors an increase in both morphotypes by providing adequate conditions for growth, such as low light intensity and milder temperatures, which are characteristic of the winter season in the northeastern Brazil.