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

TY - JOUR

T1 - Mixotrophic protists and a new paradigm for marine ecology

T2 - where does plankton research go now?

AU - Flynn, Kevin J

AU - Mitra, Aditee

AU - Anestis, Konstantinos

AU - Anschütz, Anna A.

AU - Calbet, Albert

AU - Ferreira, Guilherme Duarte

AU - Gypens, Nathalie

AU - Hansen, Per Juel

AU - John, Uwe

AU - Martin, Jon Lapeyra

AU - Mansour, Joost S

AU - Maselli, Maira

AU - Medic, Nikola

AU - Norlin, Andreas

AU - Not, Fabrice

AU - Pitta, Paraskevi

AU - Ramano, Filomena

AU - Saiz, Enric

AU - Schneider, Lisa K

AU - Stolte, Willem

AU - Traboni, Claudia

PY - 2019/7/26

Y1 - 2019/7/26

N2 - 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.

AB - 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.

U2 - 10.1093/plankt/fbz026

DO - 10.1093/plankt/fbz026

M3 - Journal article

SN - 0142-7873

VL - 41

SP - 375

EP - 391

JO - Journal of Plankton Research

JF - Journal of Plankton Research

IS - 4

ER -