Author: Tinkara Tinta, Dr. (National Institute of Biology)
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Jellyfish blooms represent a significant but largely overlooked source of labile organic matter (jelly-OM) in the ocean, characterized by a low C:N ratio. Jellyfish are important vehicles for carbon export to the ocean’s interior. To accurately incorporate them into biogeochemical models, the interactions between microbes and jelly-OM have yet to be fully characterized. We conducted jelly-OM enrichment experiments to simulate the scenario experienced by the coastal pelagic microbiome after the decay of a jellyfish bloom. We combined metagenomics, endo- and exo-metaproteomic approaches to obtain a mechanistic understanding on the metabolic network operated by the jelly-OM degrading bacterial consortium. Jelly-OM induced rapid taxonomic and functional changes in bacterial communities, resulting in a significant enrichment of protein/amino acid metabolism-related enzymes of Pseudoalteromonadaceae and Vibrionaceae compared to unamended control treatments. In accordance with the proteinaceous character of jelly-OM, Pseudoalteromonadaceae synthesized and excreted enzymes associated with proteolysis, while Vibrionaceae synthesized transporter proteins for peptides, amino acids, carbohydrates and fatty acids. In the late stage of jelly-OM degradation, Rhodobacteraceae and Alteromonadaceae became dominant and enzymes related to the assimilation of inorganic nutrients, catabolism of peptides, amino acids, nucleotides and carbohydrate transport were enriched. Thus, decaying jellyfish blooms are substantially altering the functioning and the biogeochemical state of coastal marine systems.
Category: Scientific Program Abstract > Special Sessions > SS09 Basal Metazoa - microbe interactions in the present and future ocean
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Full list of Authors
- Zihao Zhao (Department of Functional and Evolutionary Ecology, Bio-Oceanography Unit, Faculty of Life Sciences, University of Vienna, Vienna, Austria)
- Barbara Bayer (Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, USA)
- Gerhard Herndl (Department of Functional and Evolutionary Ecology, Bio-Oceanography Unit, Faculty of Life Sciences, University of Vienna, Vienna, Austria)
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METABOLISM OF MICROBIAL DEGRADERS OF JELLYFISH DETRITUS IN THE OCEAN
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Scientific Program Abstract > Special Sessions > SS09 Basal Metazoa - microbe interactions in the present and future ocean
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Preference: Oral
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