This project received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Advanced Grant agreement #834162, SUMMIT, to RS). It was also funded by the Spanish Ministry of Science and Innovation (MCIN/AEI, doi: 10.13039/501100011033) through the BIOGAPS grant (CTM2016-81008-R) to RS, the “Severo Ochoa Centre of Excellence” accreditation (CEX2019-000298-S) to the ICM, and predoctoral grants to MM-N (BES-2017-080048) and MC-B (FPU16-01925). LX and DJK were supported by funding from the National Science Foundation Chemical Oceanography program (CO-1756907) to DJK. SGG was supported by an Australian Government Endeavour Research Fellowship. GJH was supported by the Austrian Science Fund (FWF) grant P28781-B21