Morphological, molecular, and biochemical study of cyanobacteria from a eutrophic Algerian reservoir (Chefa)
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Date
2022-01-04
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Environmental Science and Pollution Research
Abstract
The cyanobacteria management in water bodies requires a deep knowledge of the community composition. Considering
the reliable and thorough information provided by the polyphasic approach in cyanobacteria taxonomy, here we assess the
cyanobacterial community structure of the Chefa reservoir from Algeria. Cyanobacteria were identifed on the basis of
morphological traits and next-generation sequencing (NGS); toxins-related genes were localized in addition to the identifcation of toxins; temperature and nutrient level of water samples were also determined. The polyphasic approach was essential
for cyanobacteria investigation; 28 genera were identifed through 16S rRNA metabarcoding with the dominance of taxa
from Microcystis (34.2%), Aphanizomenon (20.1%), and Planktothrix (20.0%), and morphological analysis revealed the
association in this water body of fve species within the genus Microcystis: M. aeruginosa, M. novacekii, M. panniformis, M.
ichthyoblabe, and M. fos-aquae. The presence of mcyE genotypes was detected; moreover, HPLC–PDA and LC–ESI–MS/
MS revealed the production of microcystin-LR. Results obtained in our study are very important since this ecosystem is used
for water supply and irrigation; as a consequence, a good water management plan is essential.