Cristin-resultat-ID: 2052997
Sist endret: 17. november 2022, 14:57
NVI-rapporteringsår: 2022
Resultat
Vitenskapelig artikkel
2022

Response of benthic foraminifera to environmental successions of cold seeps from Vestnesa Ridge, Svalbard: Implications for interpretations of paleo-seepage environments

Bidragsytere:
  • Katarzyna Melaniuk
  • Kamila Sztybor
  • Tina Treude
  • Stefan Sommer
  • Marek Zajaczkowski og
  • Tine Lander Rasmussen

Tidsskrift

Frontiers in Marine Science
ISSN 2296-7745
e-ISSN 2296-7745
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2022
Publisert online: 2022
Volum: 9
Artikkelnummer: 999902
Open Access

Importkilder

Scopus-ID: 2-s2.0-85139125800

Beskrivelse Beskrivelse

Tittel

Response of benthic foraminifera to environmental successions of cold seeps from Vestnesa Ridge, Svalbard: Implications for interpretations of paleo-seepage environments

Sammendrag

This paper presents the results of a study on the response of living benthic foraminifera to progressing environmental successions in a cold-seep ecosystem. Sediment samples were collected from Vestnesa Ridge (79°N, Fram Strait) at ~1200 m water depth. The distribution of live (Rose Bengal-stained) foraminifera were analyzed in the upper sediment layers in relation to pore water biogeochemical data together with the distribution of sulfur-bacterial mats and Siboglinidae tubeworms. At methane cold seeps, the process of environmental succession is strongly connected to the duration and strength of methane seepage and the intensity of methane-related biological processes, e.g, aerobic and anaerobic oxidation of methane (MOx and AOM, respectively). The results show that the distribution patterns of benthic foraminifera change according to the progressing environmental succession. The benthic foraminifera seemed to thrive in sediments with a moderate activity of seepage, dominated by MOx, i.e, at an early stage of seepage or when seepage decreases at a late stage of the succession. Species composition of the foraminiferal fauna under these conditions was similar to the control sites (outside of pockmarks with no seepage); the dominant species being Melonis barleeanus and Cassidulina neoteretis. In sediments with strong seepage and high AOM activity, the hostile environmental conditions due to the presence of toxic sulfide caused a reduction in the foraminiferal population, and samples were almost barren of foraminifera. In environments of moderate methane seepage, the presence of chemosynthetic Siboglinidae tube worms potentially support communities of the epibenthic species Cibicidoides wuellerstorfi. Despite the very different environmental conditions, the foraminiferal assemblages were very similar (or nearly absent). Therefore, the foraminiferal faunas cannot be used as exclusive indicators of past strength of methane seepage in palaeoceanographic interpretations

Bidragsytere

Katarzyna Melianiuk

Bidragsyterens navn vises på dette resultatet som Katarzyna Melaniuk
  • Tilknyttet:
    Forfatter
    ved Centre for Arctic Gas Hydrate, Environment and Climate ved UiT Norges arktiske universitet

Kamila Sztybor

  • Tilknyttet:
    Forfatter
    ved Akvaplan Niva AS

Tina Treude

  • Tilknyttet:
    Forfatter
    ved University of California, Los Angeles (UCLA)

Stefan Sommer

  • Tilknyttet:
    Forfatter
    ved GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel

Marek Zajaczkowski

  • Tilknyttet:
    Forfatter
    ved Polska Akademia Nauk
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