The effects of climate-induced. long-term changes on mesozooplankton biomasses were studied based on monitoring data collected since 1966 in the northern Baltic Sea. We found that the biomasses of marine and brackish mesozooplankton had decreased significantly from 1966 to 2019. and a remarkable biomass and functional biodiversity loss took place in the mesozooplankton community. https://www.getpureroutine.com/