SMX reshapes algal communities in blooms by altering algal metabolism and the potential functions of phycosphere bacteria.

SMX exposure significantly promotes Cyanobium sp. PCC 7009 growth, reaching 47.69%-62.08% relative abundance in algal communities under bloom conditions.

• Why it matters: Understanding how antibiotics like SMX affect algal communities is crucial for assessing ecological risks in eutrophic freshwater systems, especially during cyanobacterial blooms.
• What they did: Multi-omics approaches were used in laboratory experiments to analyze the effects of different SMX concentrations on algal community structure, diversity, and metabolic functions, including interactions with phycosphere bacteria.
• The result: High SMX concentrations increased alpha diversity (2.10) compared to medium levels, while overall growth was stimulated at low concentrations; metabolic responses and bacterial interactions suggest complex reshaping of community functions.