Dissolved Oxygen – The distribution and dynamics of dissolved oxygen are important in aquatic systems because it controls the distribution, behavior, physiology, and growth of organisms. – sources of O 2 : atmosphere & photosynthesis – sinks: respiration & chemical oxidation
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Dissolved Oxygen –The distribution and dynamics of dissolved oxygen are important in aquatic systems because it controls the distribution, behavior, physiology,
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Dissolved Oxygen– The distribution and dynamics of
dissolved oxygen are important in aquatic systems because it controls the distribution, behavior, physiology, and growth of organisms.
– sources of O2: atmosphere & photosynthesis
– sinks: respiration & chemical oxidation
Properties of O2
• atmosphere ~ 21% O2; ~ 79% N2
• oxygen is more soluble in water than nitrogen
• solubility increases as temperature decreases
• equilibrium concentration increases with pressure
• solubility declines exponentially with increased salinity