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Mixotrophic protists and a new paradigm for marine ecology: where does plankton research go now?

Flynn, Kevin J., Mitra, Aditee ORCID:, Anestis, Konstantinos, Anschutz, Anna A., Calbet, Albert, Ferreira, Guilherme Duarte, Gypens, Nathalie, Hansen, Per J., John, Uwe, Martin, Jon Lapeyra, Mansour, Joost S., Maselli, Maira, Medic, Nikola, Norlin, Andreas, Not, Fabrice, Pitta, Paraskevi, Romano, Filomena, Enric, Saiz, Schneider, Lisa K., Wilem, Stolte and Traboni, Claudia 2019. Mixotrophic protists and a new paradigm for marine ecology: where does plankton research go now? Journal of Plankton Research 41 (4) , pp. 375-391. 10.1093/plankt/fbz026

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Many protist plankton are mixotrophs, combining phototrophy and phagotrophy. Their role in freshwater and marine ecology has emerged as a major developing feature of plankton research over recent decades. To better aid discussions, we suggest these organisms are termed “mixoplankton”, as “planktonic protist organisms that express, or have potential to express, phototrophy and phagotrophy”. The term “phytoplankton” then describes phototrophic organisms incapable of phagotrophy. “Protozooplankton” describes phagotrophic protists that do not engage in acquired phototrophy. The complexity of the changes to the conceptual base of the plankton trophic web caused by inclusion of mixoplanktonic activities are such that we suggest that the restructured description is termed the “mixoplankton paradigm”. Implications and opportunities for revision of survey and fieldwork, of laboratory experiments and of simulation modelling are considered. The main challenges are not only with taxonomic and functional identifications, and with measuring rates of potentially competing processes within single cells, but with decades of inertia built around the traditional paradigm that assumes a separation of trophic processes between different organisms. In keeping with the synergistic nature of cooperative photo- and phagotrophy in mixoplankton, a comprehensive multidisciplinary approach will be required to tackle the task ahead.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Earth and Environmental Sciences
Publisher: Oxford University Press (OUP): Policy B - Oxford Open Option A
ISSN: 0142-7873
Date of Acceptance: 24 May 2019
Last Modified: 07 Nov 2022 09:37

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