Articles | Volume 16, issue 17
Biogeosciences, 16, 3351–3376, 2019
https://doi.org/10.5194/bg-16-3351-2019
Biogeosciences, 16, 3351–3376, 2019
https://doi.org/10.5194/bg-16-3351-2019

Research article 05 Sep 2019

Research article | 05 Sep 2019

Changes in gross oxygen production, net oxygen production, and air-water gas exchange during seasonal ice melt in Whycocomagh Bay, a Canadian estuary in the Bras d'Or Lake system

Cara C. Manning et al.

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We measured rates of biological activity and gas exchange in a Canadian estuary during ice melt. We quantified gas exchange using inert, deliberately released tracers and found that the gas transfer rate at > 90 % ice cover was 6 % of the rate for nearly ice-free conditions. We measured oxygen concentration and isotopic composition and used the data to detect changes in the rates of photosynthesis and respiration (autotrophy and heterotrophy) as the ice melted.
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