Aquatic biology is a subdiscipline of biological sciences focused on the structure, function, and interactions of organisms inhabiting freshwater and marine environments. It examines physiological adaptations to aquatic conditions, population and community dynamics, trophic interactions, and biogeochemical cycling within lakes, rivers, wetlands, estuaries, and oceans. Research in aquatic biology often integrates ecology, microbiology, evolutionary biology, and environmental chemistry to analyze primary productivity, nutrient fluxes, and responses of aquatic biota to abiotic drivers such as temperature, salinity, dissolved oxygen, and contaminants. The field underpins aquatic ecosystem assessment, conservation, and management by providing mechanistic insight into biodiversity patterns and ecosystem processes.
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