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Oxycline (Biogeochemical Feature)

Component: Biogeochemical Feature

Unique Identifier: 1348

Biogeochemical Feature Oxycline

Definition Zone in the water column where oxygen concentration changes rapidly with depth, often as a result of biological or abiotic processes that consume oxygen. Deep, bottom water that contains no photosynthetic organisms—yet receives much deposited organic matter—can generate both high respiration rates and extremely low oxygen concentrations. The transition layer between hypoxic bottom water and oxygenated surface water is the oxycline.