Deep-water inflow event increases sedimentary phosphorus release on a multi-year scale

Hylén, Astrid; van de Velde, Sebastiaan J.; Kononets, Mikhail; Luo, Mingyue; Almroth-Rosell, Elin; Hall, Per O. J.

doi:https://doi.org/10.5194/bg-18-2981-2021

Articles | Volume 18, issue 9

https://doi.org/10.5194/bg-18-2981-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-18-2981-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 9

Research article

|

17 May 2021

Research article |

| 17 May 2021

Deep-water inflow event increases sedimentary phosphorus release on a multi-year scale

Astrid Hylén, Sebastiaan J. van de Velde, Mikhail Kononets, Mingyue Luo, Elin Almroth-Rosell, and Per O. J. Hall

Data sets

Benthic fluxes and sediment properties in the Eastern Gotland Basin, Baltic Sea, following a major Baltic inflow A. Hylén, S. J. van de Velde, M. Kononets, M. Luo, E. Almroth-Rosell, and P. O. J. Hall https://doi.org/10.14284/442

Short summary

Sediments in oxygen-depleted ocean areas release high amounts of phosphorus, feeding algae that consume oxygen upon degradation, leading to further phosphorus release. Oxygenation is thought to trap phosphorus in the sediment and break this feedback. We studied the sediment phosphorus cycle in a previously anoxic area after an inflow of oxic water. Surprisingly, the sediment phosphorus release increased, showing that feedbacks between phosphorus release and oxygen depletion can be hard to break.