English
norskBlar i forfatter Artikler, rapporter og annet (geovitenskap) "Åström, Emmelie"
Viser treff 1-4 av 4
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Bivalve shell horizons in seafloor pockmarks of the last glacial-interglacial transition suggest a thousand years of methane emissions in the Arctic Ocean
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-11-05)We studied discrete bivalve shell horizons in two gravity cores from seafloor pockmarks on the Vestnesa Ridge (1200 m water depth) and western Svalbard (798000 N, 068550 W) to provide insight into the temporal and spatial dynamics of seabed methane seeps. The shell beds, dominated by two genera of the family Vesicomyidae: Phreagena s.l. and Isorropodon sp., were 20–30 cm thick and centered at ... -
Chemosynthesis influences food web and community structure in high-Arctic benthos
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-25)Cold seeps are locations where seafloor communities are influenced by the seepage of methane and other reduced compounds from the seabed. We examined macro-infaunal benthos through community analysis and trophic structure using stable isotope analysis at 3 seep locations in the Barents Sea. These seeps were characterized by high densities of the chemosymbiotic polychaetes Siboglinidae, clade Frenulata ... -
Methane cold seeps as biological oases in the high-Arctic deep sea
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-10-27)Cold seeps can support unique faunal communities via chemosynthetic interactions fueled by seabed emissions of hydrocarbons. Additionally, cold seeps can enhance habitat complexity at the deep seafloor through the accretion of methane derived authigenic carbonates (MDAC). We examined infaunal and megafaunal community structure at high-Arctic cold seeps through analyses of benthic samples and ... -
A new genus and two new species of Thyasiridae associated with methane seeps off Svalbard, Arctic Ocean
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-05-16)Bivalves have been found in unique benthic assemblages associated with active methane seeps and mounds along the western and southern margins of the Svalbard shelf (75–79°N) at 350–380 m depth. Among the samples collected were a number of shells of Thyasiridae that are distinct from any species previously described. Here we describe one new genus Rhacothyas gen. nov. and two new species Thyasira ...
