Effects of Temperature on Oxygen Consumption and Carbon Flux in Biofilter Systems

Dec 04, 2025

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This study investigates the in-situ incubation of biofilters at the Southampton Oceanography Centre to analyze the effects of temperature on oxygen consumption and carbon flux in seawater ecosystems. Using a mixing pump, oxygen electrode, and sampling pumps, we measured average respiration rates and nutrient flux while adhering to the Redfield ratio of carbon, nitrogen, and phosphorus (C:N:P=106:16:1). Findings include Q10 values determining the influence of temperature on biogeochemical processes critical for understanding ecological dynamics.

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Effects of Temperature on Oxygen Consumption and Carbon Flux in Biofilter Systems

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Biofilter in-situ incubation Ken Collins Southampton Oceanography Centre

mixing pump Oxygen electrode Sampling pump
Control – seawater only Biofilter + seawater
Winkler bottle Pump batteries Oxygen meter

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Temperature effect Q10 ln Q10 = [10/(T2-T1)] ln k2/k1 if Q10 = 2,, T2 = 20oC, T1= 15oC ln 2 = [10/(20-15)] ln k20/k15 .693 = 2 ln k20/k15 k20= 1.414 k15
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Average respiration rate at 20oC = 53 +/_ 16 umolO2 gAFDW-1 h-1 oxygen consumption - carbon flux (1mole O2 = 1mole C) - nutrient flux (Redfield ratio C:N:P=106:16:1) - filtration rate