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

• Type: Article in International Scientific Journal
• Date: 2009

Authors

Sabour, B (Author) Other; Sbiyyaa, B (Author) Other; Loudiki, M (Author) Other; Oudra, B (Author) Other; Belkoura, M (Author) Other; Vasconcelos, V (Author) FCUP

Journal

Title: Chemistry and Ecology

Vol. 25

Pages: 277-284

ISSN: 0275-7540

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 14 Citations

Scopus - 16 Citations

Scientific classification

FOS: Natural sciences > Biological sciences

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8