Frontiers in Microbiology, Journal Year: 2024, Volume and Issue: 15

Published: Nov. 5, 2024

Harmful algal blooms (HABs) are global hazards under climate change and eutrophication conditions. Modified clay (MC) method is widely used to control HABs in Asian American coastal waters. However, little research has been conducted on the underlying mechanisms by which MC controls freshwater environments. Herein, experiments bioinformatics analyses were for MC-based of a closed water body with an area approximately 240 m 2 Fuchun River, China. Results revealed that dominant bloom species Microcystis , 87.68–97.01% removal efficiency whole biomass was achieved after 3 h treatment. The weaker zeta potentials hydrophilic groups such as O-H P-O-P extracellular polymeric substances (EPS) surrounding cells made them easier be flocculated removed particles, relative abundance decreased 29.12% Cyanobium increased 40.97%. Therefore, changes cyanobacterial community structure, accompanied elimination sp. apical dominance enhanced competition between phytoplankton community, increasing diversity. Under treatment, residual microorganisms, including cyanobacteria, had high potential DNA damage repair more likely survive being subjected oxidative stress. In meanwhile, genes involved genetic information processing, signal transduction, photosynthesis indicating microbiome week proliferation light energy harvesting. destruction colonies, function cyanobacteria phycosphere microbiome, further hindering development. These findings illustrate can regulate optimize microbial structure through ecosystems.

Language: Английский