Global change reshapes marine microbial communities, functions and One Health outcomes.

Marine microbial communities and functions are reshaped by multiple global stressors, with downstream effects on biogeochemical cycling, harmful algal blooms, and host–microbiome health outcomes.

• Why it matters: Rapid ocean warming, acidification, deoxygenation, eutrophication, pollution, and overuse threaten ecosystem services and One Health risks, but the cross-scale microbial mediators are not yet fully integrated into management.
• What they did: This Review synthesizes cross-habitat mechanisms linking marine microbiomes to altered metabolism, biogeochemical fluxes, host-associated health, and pathogen/antimicrobial resistance dynamics, and discusses intervention and stewardship options.
• The result: The synthesis frames marine microbiome science as a mediator for globally coordinated One Health strategies, proposing management protocols and financing approaches that align incentives with long-term ecosystem and public health outcomes.

AI summary of the abstract · may contain errors · not medical advice · read the paper.