Acknowledgments
The Captain and the crew of r/v Electra af Askö and Johan Burman, and Kotaro Hirose for sediment sampling assistance. Jakob Walve for facilitating water collection at Askö B1 station. The project was funded by the Swedish Research Council Formas grant number 2016-00594 and the Oscar and Lili Lamm Foundation grant number FO2018-0042. The authors acknowledge support from the National Genomics Infrastructure in Stockholm funded by Science for Life Laboratory, the Knut and Alice Wallenberg Foundation and the Swedish Research Council, and SNIC/Uppsala Multidisciplinary Center for Advanced Computational Science for assistance with massively parallel sequencing and access to the UPPMAX computational infrastructure.