Impact of cyanobacterial bloom on microbiomes of freshwater lakes

Cyanobacterial blooms are harmful because of their cyanotoxins production. It occurs due to the eutrophication of freshwater reserves. Nagpur city has three lakes which serves as public water resource and are affected by algal bloom events. Metagenomic approach was used for the exploration of taxono...

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Bibliographic Details
Published in:Journal of biosciences 2021-12, Vol.46 (4), Article 96
Main Authors: Pal, Mili, Yadav, Shailendra, Kapley, Atya, Qureshi, Asifa
Format: Article
Language:English
Subjects:
Algae
Algal blooms
Anabaena
Antibiotic resistance
Antibiotics
Aquatic ecosystems
Bacteria - drug effects
Bacteria - genetics
Biomedical and Life Sciences
Biomedicine
Blooms (metal)
Cadmium
Cell Biology
Cyanobacteria - genetics
Disease resistance
Drug resistance
Drug Resistance, Microbial - genetics
Eutrophication
Fluoroquinolones
Freshwater
Freshwater lakes
Genes
Harbors
Heavy metals
High performance liquid chromatography
HPLC
India
Inland water environment
Lakes
Lakes - chemistry
Lakes - microbiology
Life Sciences
Liquid chromatography
Metagenome
Metagenomics
Methicillin
Microbiology
Microbiomes
Microcystins - analysis
Microcystis
Microorganisms
Plant Sciences
Public waters
Taxonomy
Toxins
Vancomycin
Water Microbiology
Water pollution
Water quality
Water resources
Zinc
Zoology
β Lactamase
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Summary:Cyanobacterial blooms are harmful because of their cyanotoxins production. It occurs due to the eutrophication of freshwater reserves. Nagpur city has three lakes which serves as public water resource and are affected by algal bloom events. Metagenomic approach was used for the exploration of taxonomic, catabolic, and resistome profile of these lakes. Taxonomic profiling indicated prevalence of cyanobacterial species like Microcystis, Anabaena, Trichodesmium, Microcoleus, and Nodularia . These bacteria are well known for their association with algal bloom and microcystin production. High Performance Liquid Chromatography (HPLC) detected the presence of microcystin toxin and concentration was relatively higher in Ambazari lakewater. In addition, the presence of several antibiotic resistance genes like vancomycin, beta-lactamase, methicillin, and fluoroquinolones were observed. Genes conferring metal resistance such as copper, cadmium, zinc were also mined indicating presence of metal resistant microorganisms. The study suggests that lake water contaminated with Microcystis (algal bloom) harbors complex microbial community having diverse catabolic and resistome profiles, which negatively affect the ecosystems services.
ISSN:0250-5991
0973-7138
DOI:10.1007/s12038-021-00220-z