ME010
New Paradigms, Diverse Approaches, and Advances in Understanding Mixoplankton

Session ID#: 254431

Session Description:
The discovery of widespread mixotrophy among marine protists has prompted a paradigm shift that emphasizes a dynamic trophic spectrum, blurring the boundaries between phytoplankton and zooplankton. Many species categorised as primary producers or consumers actually combine photoautotrophy and phagotrophy as trophic modes. This impacts nutrient cycling, primary production, biomass transfer to higher trophic levels, and the sequestration of CO₂. It may also contribute to the ecological success of harmful algal bloom (HAB) species.

Recently, a variety of experimental and theoretical approaches have driven progress in this field. Laboratory studies on model organisms have deepened our understanding of mixotrophic physiology and metabolism. Molecular tools and isotopic tracers are revealing the mechanisms of nutrient acquisition. Field surveys and in situ methods are beginning to document the activity and ecological distributions of mixoplankton. Meanwhile, biogeochemical and ecosystem models are incorporating mixotrophy into new frameworks that revise our understanding of carbon and nutrient cycling in the oceans. 

This session seeks to bring together researchers applying experiments, field observations, molecular and isotopic methods, modelling, and theoretical ecology to the study of mixoplankton. We particularly welcome contributions that synthesize data, use novel methods, or quantify the roles of mixoplankton in food webs and biogeochemical cycles.

Co-Sponsor(s):
  • Ocean Biology and Biogeochemistry -
Index Terms:

4806 Carbon cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4817 Food webs, structure, and dynamics [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4840 Microbiology and microbial ecology [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4894 Instruments, sensors, and techniques [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Student/Early Career Chair:  Isaac R Miller, Bigelow Lab for Ocean Sciences, East Boothbay, United States
Primary Chair:  Dr. Marc-Andre Cormier, University of Glasgow, Geographical & Earth Sciences, Glasgow, United Kingdom
Co-Chair:  George B McManus, University of Connecticut, Marine Sciences, Groton, United States
 
Evaluating Acidotropic Dyes for Detecting Mixotrophy in Protists: Insights From Cultures and Field Communities (1850211)
Claire Cook1, Erica Monroe Ewton2, Adrian Marchetti3, Susanne Menden-Deuer4, Nicole Millette5, Shai Slomka de Oliveira6, Emily V Speciale7, Susanne Wilken6 and Natalie R. Cohen8, (1)University of Georgia, Skidaway Institute of Oceanography, Department of Marine Science, Savannah, United States, (2)University of Rhode Island, Graduate School of Oceanography, Narragansett, United States, (3)University of North Carolina at Chapel Hill, Department of Earth, Marine and Environmental Sciences, Chapel Hill, United States, (4)University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States, (5)Virginia Institute of Marine Science, Gloucester Point, United States, (6)University of Amsterdam, Institute for Biodiversity and Ecosystem Dynamics, Amsterdam, Netherlands, (7)University of North Carolina at Chapel Hill, Department of Earth, Marine and Environmental Sciences, Chapel Hill, United States, (8)University of Georgia, Skidaway Institute of Oceanography, Savannah, United States
 
Biophysical Trapping and Sexual Reproduction Drive Intense Blooms of a Mixotrophic Dinoflagellate in a Salt Marsh (2010183)
Serena Sung-Clarke1,2, Nour Ayache2, Wenguang Zhang3, David K Ralston4, Evan Lechner5, Susan Drapeau6, Juliette Smith7, Mengmeng Tong3, Aleck Zhaohui Wang8, Collin S Roesler6, Michael Brosnahan9 and Savannah Davis10, (1)Massachusetts Institute of Technology, Earth, Atmospheric, and Planetary Sciences, Cambridge, United States, (2)Woods Hole Oceanographic Institution, Biology, Woods Hole, United States, (3)Zhejiang University, Ocean College, Hangzhou, China, (4)WHOI, Department of Applied Ocean Physics & Engineering, Woods Hole, United States, (5)Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, United States, (6)Bowdoin College, Earth and Oceanographic Science, Brunswick, United States, (7)Virginia Institute of Marine Science, Gloucester Point, United States, (8)Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, MA, United States, (9)Woods Hole Oceanographic Institution, Woods Hole, United States, (10)North Carolina A & T State University, Greensboro, United States
 
Characterizing Mixoplankton Across Nutrient Delivery Regimes in the Galápagos (2017439)
Emily V Speciale1, Margarita Lankford2 and Adrian Marchetti2, (1)University of North Carolina at Chapel Hill, Department of Earth, Marine and Environmental Sciences, Chapel Hill, United States, (2)University of North Carolina at Chapel Hill, Department of Earth, Marine and Environmental Sciences, Chapel Hill, United States
 
A novel natural radiocarbon approach to quantify mixotrophic carbon partitioning in the Chrysophyte Ochromonas (2025397)
So Hyun Ahn, Woods Hole Oceanographic Institution, Biology, Woods Hole, MA, United States, Susan Q Lang, Woods Hole Oceanographic Institution, Geology and Geophysics, Woods Hole, United States and Matthew D Johnson, Woods Hole Oceanographic Institution, Biology Department, Woods Hole, MA, United States
 
The importance of mixotrophy for estuarine phytoplankton growth and nutrient cycling (2027125)
Dr. Dante M L Horemans1, Marjorie A. M. Friedrichs1, Pierre St-Laurent1, Raleigh R Hood2 and Christopher W. Brown3,4, (1)Virginia Institute of Marine Science, William & Mary, Gloucester Point, United States, (2)University of Maryland Center for Environmental Science Horn Point Laboratory, Cambridge, United States, (3)University of Maryland, Earth System Science Interdisciplinary Center, College Park, United States, (4)Global Science and Technology Inc Greenbelt, Greenbelt, United States
 
Mixotrophic Phytoplankton and Their Ecological Role in Carbon Cycling in the Coastal Baltic Sea (2028030)
Johanna Exner, Department of Biology and Environmental Science, Centre of Ecology and Evolution and Microbial Model Systems, Linnaeus University, 392 31 Kalmar, Sweden, Kalmar, Sweden, Catherine Legrand, School of Health and Welfare, Jönköping University, Gjuterigatan 5, 55111 Jönköping, Sweden, Jönköping, Sweden and Elin Lindehoff, Department of Biology and Environmental Science, Centre of Ecology and Evolution in Microbial Model Systems, Linnaeus University, 392 31 Kalmar, Sweden, Kalmar, Sweden
 
Effect of Increasing Temperature on Plankton Community Composition and Trophic Mode (2031632)
Zabdiel Roldan Ayala, Virginia Institute of Marine Science, College of William & Mary, Gloucester Point, United States, Dr. Marc-Andre Cormier, University of Glasgow, Geographical & Earth Sciences, Glasgow, United Kingdom and Nicole Millette, Virginia Institute of Marine Science, Gloucester Point, United States
 
How are temperature dependent metabolic processes modified in algal symbioses? (2032599)
Margaret A. Slein, University of British Columbia, Department of Zoology and Biodiversity Research Centre, Vancouver, Canada and Mary I Connor, University of British Columbia, Department of Zoology, Vancouver, Canada
 
Marine Heatwaves and Mixotrophy in Aloricate Ciliates: A Western North Pacific Synthesis (2035217)
Chiho Funaki1, Mutsuo Ichinomiya2, Mitsunori Iwataki1, Taketoshi Kodama1 and Kazutaka Takahashi1, (1)The University of Tokyo, Graduate School of Agricultural and Life Sciences, Tokyo, Japan, (2)Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto, Kumamoto, Japan
 
Navigating Ecophysiological Processes of Marine Microplankton Using Isotopic Analyses (2035426)
Dr. Marc-Andre Cormier1, Jean-Baptiste Berard2, Mohammad Ali Salik1, Kevin J. Flynn3 and Gael Bougaran2, (1)University of Glasgow, Geographical & Earth Sciences, Glasgow, United Kingdom, (2)IFREMER, Laboratoire de Physiologie des Microalgues PHYSALG, Nantes, France, (3)Plymouth Marine Laboratory, Plymouth, United Kingdom
 
Quantifying Trophic Ratio in the Mixotrophic Dinoflagellate Akashiwo sanguinea (2044584)
Jackie Wallis1, Isaac R Miller2, Karen Stamieszkin2, Nicole Poulton3 and Nicole Millette4, (1)Clark University, Worcester, United States, (2)Bigelow Lab for Ocean Sciences, East Boothbay, United States, (3)Bigelow Laboratory for Ocean Sciences, East Boothbay, United States, (4)Virginia Institute of Marine Science, Gloucester Point, United States
 
Phago-mixotrophic Carbon Acquisition on a Size Continuum (2046941)
Isaac R Miller1, Jackie Wallis2, Karen Stamieszkin1, Nicole Poulton3 and Nicole Millette4, (1)Bigelow Lab for Ocean Sciences, East Boothbay, United States, (2)Clark University, Worcester, United States, (3)Bigelow Laboratory for Ocean Sciences, East Boothbay, United States, (4)Virginia Institute of Marine Science, Gloucester Point, United States
 
Mixotrophic metabolic landscapes and requirements shape trophic investment in competition (2047142)
Max Jahns, Woods Hole Oceanographic Institution, Biology Department, Woods Hole, United States, So Hyun Ahn, Organization Not Listed, Washington, DC, United States, Holly Moeller, University of California Santa Barbara, Ecology, Evolution & Marine Biology, Santa Barbara, United States and Matthew D Johnson, Woods Hole Oceanographic Institution, Biology Department, Woods Hole, MA, United States
 
Investigating Shifts in Mixotroph Metabolism and Stoichiometry via Cellular-Scale Modeling (2047911)
Zoe Aarons, Massachusetts Institute of Technology, Earth, Atmospheric and Planetary Sciences, Cambridge, United States and Michael J Follows, Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences, Cambridge, United States
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