Effect of light and temperature on the population dynamics of two toxic bloom forming Cyanobacteria - Microcystis ichthyoblabe and Anabaena aphanizomenoides

• Tipo: Artigo em Revista Científica Internacional
• Data: 2009

Autores

Sabour, B (Autor) Outra; Sbiyyaa, B (Autor) Outra; Loudiki, M (Autor) Outra; Oudra, B (Autor) Outra; Belkoura, M (Autor) Outra; Vasconcelos, V (Autor) FCUP

Revista

Título: Chemistry and Ecology

Vol. 25

Páginas: 277-284

ISSN: 0275-7540

Editora: Taylor & Francis

Indexação

ISI Web of Knowledge - 14 Citações

Scopus - 16 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Ciências biológicas

Outras Informações

ID Authenticus: P-003-PD3

DOI: 10.1080/02757540903062525

Abstract (EN): The effect of light and temperature on the growth of Microcystis ichthyoblabe and Anabaena aphanizomenoides, isolated from the subtropical Oued Mellah lake, Morocco (33 degrees 30'N-07 degrees 20'W), were investigated in batch culture. Growth rates at 66 light-temperature combinations were determined and fitted with different mathematical models. The results show that the two Cyanobacteria grow at all light intensities and temperatures, except at 10 degrees C for A. aphanizomenoides, where the growth was strongly limited. The max of M. ichthyoblabe increased with temperature from 0.56d-1 at 10 degrees C to 1.32d-1 at 35 degrees C. At all tested temperatures, a relative photoinhibition within the studied range of irradiance was observed and the photosensitivity was thermodependent. For Anabaena, the obtained max ranged between 0.07d-1 at 10 degrees C and 1.46d-1 at 35 degrees C, and a weak photoinhibition was observed at 15 degrees C. The positive correlation between max and Iopt (r2 epsilon 0.93) indicates a close interaction between light and temperature on the cyanobacteria growth. The results obtained in this work suggest that the growth of these two species is possible under low light and low temperature.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8