OB019
Microbial transformation of organic matter across aquatic gradients: Mechanisms, strategies, and ecosystem impacts
Session ID#: 259484
Session Description:
Organic matter (OM) turnover in aquatic ecosystems, from surface waters to the deep ocean, drives global carbon and nutrient cycles. Microbial communities are central to these transformations, yet our understanding of the relationships among community composition, metabolic function, and the chemical and physical properties of OM remains incomplete. This session explores how microbial processes mediate the fate of OM across environmental gradients, particularly changes in physico-chemical conditions, substrate availability, and community interactions.
We invite studies linking microbial community structure and function to OM composition and turnover across aquatic environments, from local to global scales. We welcome research addressing microbial adaptations to spatial or environmental gradients, including taxon-specific activities, enzyme production and expression, and the roles of niche-separated microbes. Also encouraged are studies exploring how biotic and abiotic interactions influence OM transformation.
We especially seek contributions integrating molecular and biogeochemical approaches, including meta-genomics, -transcriptomics, -proteomics, metabolomics, enzyme assays, rate measurements, as well as chemical and physical OM characterization. Comparative and modeling studies that offer conceptual or predictive frameworks for OM cycling are also welcome. This session aims to foster a mechanistic and integrative understanding of how microbial metabolism shape the fate of OM and regulate biogeochemical cycles in dynamic aquatic systems.
Co-Sponsor(s):
Index Terms:
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4806 Carbon cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4840 Microbiology and microbial ecology [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Primary Chair: Jutta Niggemann, Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl von Ossietzky Universität Oldenburg, Oldenburg, Germany
Co-chairs: Yuan Shen, Xiamen University, State Key Laboratory of Marine Environmental Science, Xiamen, China, Eva Ortega-Retuerta, CNRS, Laboratoire d'Océanographie Microbienne (LOMIC), Banyuls-sur-Mer, France and Zihao Zhao, University of Vienna, Vienna, Austria
The interplay of substrate and temperature alters microbial communities and carbon fluxes in the Arctic Ocean (1864308)
Nathan Nault1, Barbara Marie2, Olivier Crispi3, Jonathan Gagnon4, Corentin Gouzien2, Christophe Salmeron2, Pierre E Galand5 and Eva Ortega-Retuerta3, (1)Sorbonne University, Observatoire océanologique de Banyuls sur mer, Banyuls sur Mer, France, (2)CNRS, Observatoire océanologique de Banyuls-sur-Mer, Banyuls-sur-Mer, France, (3)CNRS, Laboratoire d'Océanographie Microbienne (LOMIC), Banyuls-sur-Mer, France, (4)Laval University, Biologie, Quebec City, QC, Canada, (5)CNRS, Observatoire océanologique de Banyuls-sur-Mer, LECOB, Banyuls-sur-Mer, France
Linking microbial communities to vertical changes in dissolved organic matter quality across deep chlorophyll maxima in the NW Mediterranean Sea (1890190)
Eva Ortega-Retuerta1, Josep M. Gasol2, Ramon Massana3, Olivier Crispi4, Barbara Marie5, Marta Sebastián6, Charles-Hubert Paulin7, Ona Deulofeu3 and Xavier Rey3, (1)UNITED STATES, (2)Institut de Ciències del Mar - CSIC, Barcelona, Spain, (3)ICM-CSIC, Barcelona, Spain, (4)CNRS, Laboratoire d'Océanographie Microbienne (LOMIC), Banyuls-sur-Mer, France, (5)CNRS, Observatoire océanologique de Banyuls-sur-Mer, Banyuls-sur-Mer, France, (6)Institut de Ciències del Mar, CSIC, Barcelona, Spain, (7)Observatoire Océanologique de Banyuls sur Mer, Banyuls sur Mer, France
Contribution of bacterial extracellular vesicles to marine dissolved organic carbon pools (2020075)
Steven Biller1, Krista Longnecker2, Samantha Silvestri1, Caroline Jongbloed1, Christian Nielsen1, M. Gray Ryan1 and Ashley Stein1, (1)Wellesley College, Department of Biological Sciences, Wellesley, United States, (2)Woods Hole Oceanographic Inst, Marine Chemistry & Geochemistry, Woods Hole, United States
One strait, two stories: organic matter transformation in a major Arctic gateway (2025767)
Rafael Gonçalves-Araujo1, Igor Pessi2, Juliana D'Andrilli3, Bilal Aftab3, Sarah Fawcett4, Colin A Stedmon5, Mats A Granskog6, Lumi Haraguchi7 and Bilal Aftab, (1)Technical University of Denmark, National Institute of Aquatic Resources, Lyngby, Denmark, (2)University of Helsinki, Helsinki, Finland, (3)University of North Texas, Denton, United States, (4)University of Cape Town, Oceanography Department, Cape Town, South Africa, (5)Technical University of Denmark, National Institute of Aquatic Resources, Kongens Lyngby, Denmark, (6)Norwegian Polar Institute, Tromsø, Norway, (7)Finnish Environment Institute, Helsinki, Finland
Variations in Relative Phytoplankton Abundance and Membrane Lipid Composition in the California Current Ecosystem (2028059)
Noah Schuhmann1, Riley J Hale2, Miguel Desmarais3, Kimberly J. Popendorf4, Lydia Baker5, Jeff Shovlowsky Bowman3 and Claire P. Till6, (1)Humboldt State University, Arcata, United States, (2)Scripps Institution of Oceanography, La Jolla, United States, (3)University of California, San Diego, Scripps Institution of Oceanography, La Jolla, United States, (4)Rosenstiel School of Marine, Atmospheric, and Earth Science, University of Miami, Department of Ocean Sciences, Miami, United States, (5)California State University Monterey Bay, Seaside, United States, (6)Humboldt State University, Chemistry, Arcata, CA, United States
Steps Toward Activity-Based Protein Profiling of Serine Hydrolases in Seawater Using a Fluorophosphonate Probe (2029083)
Jacob T Perez1, Ramon Gudiño Garcia2, Matthew R Pratt2 and Andrew D Steen3, (1)University of Southern California, Earth Sciences, Los Angeles, United States, (2)University of Southern California, Chemistry, Los Angeles, United States, (3)University of Southern California, Biology, Los Angeles, United States
Temperature and Photoperiod Effects on Dissolved Organic Carbon Release by the Arctic Diatom Thalassiosira gravida: a Comparison between Axenic and Xenic Cultures (2029811)
Mr. Frederik Bussmann1, Jakob Giesler1, Sylke Wohlrab1, Oliver J. Lechtenfeld2, Jan Kaesler3 and Boris P Koch1,4, (1)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Ecological Chemistry, Bremerhaven, Germany, (2)Helmholtz Centre for Environmental Research UFZ Leipzig, Department Environmental Analytical Chemistry, Leipzig, Germany, (3)Helmholtz Centre for Environmental Research UFZ Leipzig, Analytical Chemistry, Leipzig, Germany, (4)University of Applied Sciences Bremerhaven, Bremerhaven, Germany
Spatial and temporal dynamics of DOM and microbial communities along the aquatic continuum from the Andes to the ocean (2031467)
Morgane Derrien1, Simona Retelletti Brogi2, Zoé Hayet1, Fernando Lizana3, Mario Flores4, Celine Lavergne5,6 and Chiara Santinelli7, (1)University of O´Higgins, Institute of Agrofood, Animal and Environmental Sciences (ICA3), San Fernando, Chile, (2)National Institute of Oceanography and Applied Geophysics OGS, Trieste, Italy, (3)University of O´Higgins, Master’s Program in Environmental and Earth Sciences, San Fernando, Chile, (4)University of O´Higgins, Environmental Engineering Degree Program, San Fernando, Chile, (5)Institut de Ciències del Mar, Biologia Marina i Oceanografia, Barcelona, Spain, (6)ICM-CSIC, Barcelona, Spain, (7)Biophysics Institute, National Research Council (CNR-IBF), Pisa, Italy
Controls on Alkaline Phosphatase Activity in the Global Surface Open Ocean (2034183)
Dr. Bei Su, PhD1, Xianrui Song2, Solange Duhamel3, Clare Davis4, Ingrid Ivančić5, Shuo Zhou1 and Jihua Liu1, (1)Shandong University, Institute of Marine Science and Technology, Qingdao, China, (2)The Yellow River Delta Sustainable Development Institute of Shandong Province, Dongying, China, (3)University of Arizona, Molecular and Cellular Biology, Tucson, United States, (4)Springer Nature, London, United Kingdom, (5)Center for Marine Research, Ruder Boškovic ́ Institute, G. Paliage 5, 52210 Rovinj, Croatia
Rewilding Effects on Microbial Networks in Intertidal Soft Sediments (2036699)
Willem Stock1, Yeseren Kayacan2, Koen Sabbe1 and the REWRITE consortium, (1)Laboratory of Protistology and Aquatic Ecology, Ghent University, Ghent, Belgium, (2)Protistology and Aquatic Ecology, Dpt. of Biology, Ghent University, Ghent, Belgium
Differential Single-Cell Mixotrophic Nitrogen and Carbon Uptake Drives Niche Partitioning of Marine Synechococcus (2037065)
Bowen He, Xiamen University School of Ocean and Earth Sciences, Xiamen, China, Qiang Zheng, State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China and Nianzhi Jiao, Xiamen University, Innovation Research Center for Carbon Neutralization, Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen, China
Cellular and Biochemical Evidence of Microbial Adaptation to High Pressure and Energy Limitation in the Subseafloor of the Puerto Rico Trench (2039368)
Miguel Desmarais1, Corinna Breusing2, Alvaro Munoz Plominsky1, Chloé M. J. Baumas3, William D Orsi4, Yuki Morono5, Anne E Dekas3, Jeff Shovlowsky Bowman1, Steven D'Hondt2 and Douglas H Bartlett6, (1)University of California, San Diego, Scripps Institution of Oceanography, La Jolla, United States, (2)University of Rhode Island, Graduate School of Oceanography, Narragansett, United States, (3)Stanford University, Earth System Science, Stanford, United States, (4)Ludwig Maximilians University of Munich, Munich, Germany, (5)JAMSTEC, Kochi Institute for Core Sample Research, Kochi, Japan, (6)University of California, San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States
Pressure sensitivity and resistance of particulate organic matter-degrading microbes (2042061)
Holly Stapelfeldt1, Devangi Sathe2, Noemi Schollmeyer3, Sabine Dalais1, Chad Lloyd4, Carol Arnosti4, Ronnie N Glud5 and John Paul Paul Balmonte1, (1)Lehigh University, Earth and Environmental Sciences, Bethlehem, United States, (2)University of Southern Denmark, Biology, Odense, Denmark, (3)Lehigh University, Earth & Environmental Sciences, Bethlehem, United States, (4)University of North Carolina at Chapel Hill, Earth, Marine and Environmental Sciences, Chapel Hill, United States, (5)University of Southern Denmark, Department of Biology, Odense M, Denmark
Microbial succession and degradation of organic carbon subsidies during polar night and polar day (2042162)
John Paul Paul Balmonte, Lehigh University, Earth and Environmental Sciences, Bethlehem, United States, Ashok Jagtap, National Centre for Polar and Ocean Research, Arctic Ecology and Biogeochemistry, Goa, India, Shikhar Kumar, National centre for Polar and Ocean Research, Vasco da Gama, India, Noemi Schollmeyer, Lehigh University, Earth & Environmental Sciences, Bethlehem, United States, Emelia Chamberlain, Woods Hole Oceanographic Institution, Woods Hole, United States, Josh Duran, Lehigh University, Earth and Environmental Science, Bethlehem, United States, Anand Jain, National Centre for Polar and Ocean Research, MoES, Arctic Sciences, Goa, India and Zeke Williams, Berea College, Berea, United States
Eruption-Driven Changes in Hydrothermal Plume Microbial Communities at the East Pacific Rise (2044250)
Samuel M McNichol1, Sunita R Shah Walter2, Andrew S Wozniak2, Sasha Wagner3 and Nagissa Mahmoudi4, (1)McGill University, Department of Earth and Planetary Sciences, Montreal, Canada, (2)University of Delaware, School of Marine Science and Policy, Newark, DE, United States, (3)Rensselaer Polytechnic Institute, Earth and Environmental Sciences, Troy, NY, United States, (4)McGill University, Earth and Planetary Sciences, Montreal, QC, Canada
Influences of Dissolved Organic Matter Quality and Quantity on Bacterial Growth Efficiency Assessed With ATP Turnover Rates Across California Current Biogeochemical Provinces (2044811)
Claire Fandel1, Sabrina Glynn1, Allison Cook2, Alee Winkler1, Kayla Ellerbe1, Katrina Rosing1, Tiffany Mastrovito3, Noah Schuhmann4, Miguel Desmarais5, Ewa Merz5, Jeff Shovlowsky Bowman5 and Kimberly J. Popendorf1, (1)Rosenstiel School of Marine, Atmospheric, and Earth Science, University of Miami, Department of Ocean Sciences, Miami, United States, (2)Department of Oceanography, Texas A&M University, College Station, United States, (3)California State University Northridge, Geography and Environmental Sciences, Northridge, United States, (4)Humboldt State University, Arcata, United States, (5)University of California, San Diego, Scripps Institution of Oceanography, La Jolla, United States
Variation in lipid composition in a nutrient addition experiment across three distinct biogeochemical regions of the California Current ecosystem (2048015)
Alee Winkler1, Sabrina Glynn1, Claire Fandel1, Allison Cook2, Kayla Ellerbe1, Katrina Rosing1, Noah Schuhmann3, Joaquin Escobar Jr.4, Ewa Merz5, Melissa L Brock6, Miguel Desmarais5, Jeff Shovlowsky Bowman5 and Kimberly J. Popendorf1, (1)Rosenstiel School of Marine, Atmospheric, and Earth Science, University of Miami, Department of Ocean Sciences, Miami, United States, (2)Department of Oceanography, Texas A&M University, College Station, United States, (3)Humboldt State University, Arcata, United States, (4)California State University Sacramento, Department of Geology, Sacramento, United States, (5)University of California, San Diego, Scripps Institution of Oceanography, La Jolla, United States, (6)University of San Diego, San Diego, United States
