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Göteborgs universitets publikationer

Discovery of symbiotic nitrogen fixation and chemoautotrophy in cold-water corals

Författare och institution:
Jack J. Middelburg (-); Christina E. Mueller (-); Bart Veuger (-); Ann I. Larsson (Institutionen för marina vetenskaper); Armin Form (-); Dick van Oevelen (-)
Publicerad i:
Scientific Reports, 5 s. artikel nr 17962
Artikel, refereegranskad vetenskaplig
Sammanfattning (abstract):
Cold-water corals (CWC) are widely distributed around the world forming extensive reefs at par with tropical coral reefs. They are hotspots of biodiversity and organic matter processing in the world’s deep oceans. Living in the dark they lack photosynthetic symbionts and are therefore considered to depend entirely on the limited flux of organic resources from the surface ocean. While symbiotic relations in tropical corals are known to be key to their survival in oligotrophic conditions, the full metabolic capacity of CWC has yet to be revealed. Here we report isotope tracer evidence for efficient nitrogen recycling, including nitrogen assimilation, regeneration, nitrification and denitrification. Moreover, we also discovered chemoautotrophy and nitrogen fixation in CWC and transfer of fixed nitrogen and inorganic carbon into bulk coral tissue and tissue compounds (fatty acids and amino acids). This unrecognized yet versatile metabolic machinery of CWC conserves precious limiting resources and provides access to new nitrogen and organic carbon resources that may be essential for CWC to survive in the resource-depleted dark ocean.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Biologiska vetenskaper ->
Ekologi ->
Marin ekologi
Postens nummer:
Posten skapad:
2015-12-11 09:59
Posten ändrad:
2015-12-17 10:56

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