AUTHOR=Boss Emmanuel , Waite Anya M. , Karstensen Johannes , Trull Tom , Muller-Karger Frank , Sosik Heidi M. , Uitz Julia , Acinas Silvia G. , Fennel Katja , Berman-Frank Ilana , Thomalla Sandy , Yamazaki Hidekatsu , Batten Sonia , Gregori Gerald , Richardson Anthony J. , Wanninkhof Rik TITLE=Recommendations for Plankton Measurements on OceanSITES Moorings With Relevance to Other Observing Sites JOURNAL=Frontiers in Marine Science VOLUME=Volume 9 - 2022 YEAR=2022 URL=https://www.frontiersin.org/journals/marine-science/articles/10.3389/fmars.2022.929436 DOI=10.3389/fmars.2022.929436 ISSN=2296-7745 ABSTRACT=Measuring plankton and associated variables on ocean time-series sites has the potential to revolutionize our understanding of ocean biology and its ties to ocean biogeochemistry by opening temporal scales (e.g., resolving diel cycles) not typically sampled as a function of depth. We focus primarily on the OceanSITES program as it is the largest network of long-term open-ocean time-series stations. In this review we motivate the addition of biological measurements to time-series sites by detailing science questions they could help address, reviewing existing technology that could be deployed to do so, and providing examples of time-series sites already deploying some of those technologies. We emphasize data management aspects as these are critical to maximize the utility of such data and wrap-up with a recommendation for an implementation plan.