20.500.12556/DiRROS-19536 Microbial processing of jellyfish detritus in the ocean When jellyfish blooms decay, sinking jellyfish detrital organic matter (jelly-OM), rich in proteins and characterized by a low C:N ratio, becomes a significant source of OM for marine microorganisms. Yet, the key players and the process of microbial jelly-OM degradation and the consequences for marine ecosystems remain unclear. We simulated the scenario potentially experienced by the coastal pelagic microbiome after the decay of a bloom of the cosmopolitan Aurelia aurita s.l. We show that about half of the jelly-OM is instantly available as dissolved organic matter and thus, exclusively and readily accessible to microbes. During a typical decay of an A. aurita bloom in the northern Adriatic Sea about 100 mg of jelly-OM L–1 becomes available, about 44 μmol L–1 as dissolved organic carbon (DOC), 13 μmol L–1 as total dissolved nitrogen, 11 μmol L–1 of total hydrolyzable dissolved amino acids (THDAA) and 0.6 μmol L–1 PO43–. The labile jelly-OM was degraded within 1.5 days (>98% of proteins, ∼70% of THDAA, 97% of dissolved free amino acids and the entire jelly-DOC pool) by a consortium of Pseudoalteromonas, Alteromonas, and Vibrio. These bacteria accounted for >90% of all metabolically active jelly-OM degraders, exhibiting high bacterial growth efficiencies. This implies that a major fraction of the detrital jelly-OM is rapidly incorporated into biomass by opportunistic bacteria. Microbial processing of jelly-OM resulted in the accumulation of tryptophan, dissolved combined amino acids and inorganic nutrients, with possible implications for biogeochemical cycles. mikrobiologija morska mikrobna skupnost raztopljene organske snovi meduze true false true Angleški jezik Slovenski jezik Neznano 2024-07-19 03:44:07 2024-07-22 11:43:18 2024-07-23 03:55:53 0000-00-00 00:00:00 2020 0 0 Nasl. z nasl. zaslona; Opis vira z dne 13. 10. 2020; str. 1-18 Vol. 11 2020 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2020-10-30 579 1664-302X 10.3389/fmicb.2020.590995 32282883 https://www.frontiersin.org/articles/10.3389/fmicb.2020.590995/abstract 1 9f2e727b-455f-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=26937 RAZ_Tinta_Tinkara_2020.pdf RAZ_Tinta_Tinkara_2020.pdf 1 E66341F15544E95BD0F15508569313CB 6f8a5c6fc59006827519b159847b8005a2101feadcc6aa0c771853aae5e8b344 6cb412ff-47fe-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=27082 Nacionalni inštitut za biologijo 0 0 0