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

Manning, Cara C.; Stanley, Rachel H. R.; Nicholson, David P.; Loose, Brice; Lovely, Ann; Schlosser, Peter; Hatcher, Bruce G.

doi:https://doi.org/10.5194/bg-16-3351-2019

Articles | Volume 16, issue 17

https://doi.org/10.5194/bg-16-3351-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-16-3351-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 16, issue 17

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, Rachel H. R. Stanley, David P. Nicholson, Brice Loose, Ann Lovely, Peter Schlosser, and Bruce G. Hatcher

Supplement

https://doi.org/10.5194/bg-16-3351-2019-supplement

Data sets

Oxygen/argon, triple oxygen isotope, and CTD data from Bras d'Or Lake, Nova Scotia, Canada C. C. Manning and R. H. R. Stanley https://doi.org/10.5281/zenodo.789049

Model code and software

calcGOP: MATLAB functions for the calculation of gross oxygen production from triple oxygen isotope data C. C. Manning and E. M. Howard https://doi.org/10.5281/zenodo.596323

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Short summary

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.