Acknowledgements
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. The computations were performed on resources provided by SNIC through Uppsala Multidisciplinary Center for Advanced Computational Science (UPPMAX) under Project SNIC 2018-8-246. Research activities were funded by the Stockholm University’s strategic funds for Baltic Sea research. SB was supported by the Swedish Research Council Formas (Grant No. 2017-01513).