Cristin-resultat-ID: 1027992
Sist endret: 30. oktober 2017 11:02
NVI-rapporteringsår: 2013
Resultat
Vitenskapelig artikkel
2013

Faunal trophic structure at hydrothermal vents on the southern Mohn's Ridge, Arctic Ocean

Bidragsytere:
  • Andrew Kvassnes Sweetman
  • Lisa Levin
  • Hans Tore Rapp og
  • Christoffer Schander

Tidsskrift

Marine Ecology Progress Series
ISSN 0171-8630
e-ISSN 1616-1599
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2013
Volum: 473
Sider: 115 - 131
Open Access

Importkilder

Isi-ID: 000313780300009

Klassifisering

Vitenskapsdisipliner

Marinbiologi • Økologi

Finansiering

  • Norges forskningsråd

    • Prosjektkode: 179560

Beskrivelse Beskrivelse

Tittel

Faunal trophic structure at hydrothermal vents on the southern Mohn's Ridge, Arctic Ocean

Sammendrag

We explore the trophic ecology of heterotrophic fauna associated with a high temperature (HT) vent, 2 low temperature vents, a ‘near-HT vent’ habitat and a non-vent site situated at upper bathyal depths on the southern Mohn’s Ridge in the Arctic Ocean. Only a single taxon (the gastropod Pseudosetia griegi) was found at the high temperature vent habitat. Their mean δ13C values were significantly lighter than conspecifics from a low temperature vent habitat within the same vent field, reflecting the incorporation of sulfide oxidizing bacteria into the biomass of the animals. The majority of fauna from the low temperature, near-HT, and non-vent habitats had isotopic signatures indicative of assimilation of photosynthetic material. However, we found remarkably diverse isotopic compositions among the fauna sampled here, with a small sub-set of fauna at each site possessing C and N isotopic signatures indicative of incorporation of chemo - synthetic production. Moreover, when isotopic signatures of similar taxa were compared from the same sample, δ13C signatures suggested a high degree of trophic complexity can exist over relatively small spatial scales at vent habitats on the southern Mohn’s Ridge. The high contribution of photosynthetic food material to faunal diets and variability in food types may result from the upper bathyal venting depth and sedimentary nature of the vents. We hypothesize that the upper bathyal depth of active venting may lead to iron enhancement of surface photosynthetic production, especially in high nutrient areas, which ultimately sinks to the seabed where it is incorporated by fauna around the vents.

Bidragsytere

Andrew Kvassnes Sweetman

  • Tilknyttet:
    Forfatter
    ved SFF - Senter for geobiologi ved Universitetet i Bergen
  • Tilknyttet:
    Forfatter
    ved Marin biogeokjemi og oseanografi ved Norsk institutt for vannforskning

Lisa Levin

  • Tilknyttet:
    Forfatter
    ved The Scripps Research Institute

Hans Tore Rapp

  • Tilknyttet:
    Forfatter
    ved SFF - Senter for geobiologi ved Universitetet i Bergen
  • Tilknyttet:
    Forfatter
    ved Institutt for biovitenskap ved Universitetet i Bergen

Christoffer Schander

  • Tilknyttet:
    Forfatter
    ved Institutt for biovitenskap ved Universitetet i Bergen
  • Tilknyttet:
    Forfatter
    ved Universitetsmuseet i Bergen, Direktørens stab ved Universitetet i Bergen
  • Tilknyttet:
    Forfatter
    ved SFF - Senter for geobiologi ved Universitetet i Bergen
  • Tilknyttet:
    Forfatter
    ved Uni Research Miljø ved NORCE Norwegian Research Centre AS
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