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  • Diatoms  (2)
  • %OH; Acyclic glycerol dialkyl glycerol tetraether (peak area); AGE; ANT-XXIII/9; Branched and isoprenoid tetraether index; Calculated according to Fietz et al. (2016); Calculated according to Hopmans et al. (2004); De Jonge et al. (2015); Calculated according to Huguet et al. (2013); Calculated according to Lü et al. (2015); Calculated according to Schouten et al. (2002); Co1010; COMPCORE; Composite Core; Crenarchaeol (peak area); Crenarchaeol regio-isomer (peak area); DEPTH, sediment/rock; Dicyclic glycerol dialkyl glycerol tetraether (peak area); Extended tetraether index of 86 carbon atoms with OH-isoGDGTs; Filla Island, Rauer Group, Antarctica; GDGTs; Hydroxide; Hydroxylated acyclic glycerol dialkyl glycerol tetraether (peak area); Hydroxylated dicyclic glycerol dialkyl glycerol tetraether (peak area); hydroxylated GDGTs; Hydroxylated monocyclic glycerol dialkyl glycerol tetraether (peak area); Monocyclic glycerol dialkyl glycerol tetraether (peak area); NIOZ_UU; NIOZ Royal Netherlands Institute for Sea Research, and Utrecht University; OH-GDGTs; paleotemperature proxy; Polarstern; PS69; Ring index of hydroxylated tetraethers RI-OH; Ring index of hydroxylated tetraethers RI-OH'; RI-OH; Sample code/label; Sea surface temperature, annual mean; SST, from TEX86H (Kim et al., 2010); SST, from TEXH86, BAYSPAR (BAYesian SPAtially-varying Regression) (Tierney and Tingley, 2014, 2015); surface sediments; Tetraether index of 86 carbon atoms; Tetraether index of 86 carbon atoms including OH-isoGDGT-0; TEX86; TEX86OH; Tricyclic glycerol dialkyl glycerol tetraether (peak area); Ultra high performance liquid chromatography mass spectrometer (UHPLC-MS)  (1)
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  • 1
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    Rapid sulfurisation of highly branched isoprenoid (HBI) alkenes in sulfidic Holocene sediments from Ellis Fjord, Antarctica (2008)
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © Elsevier B.V., 2007. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Organic Geochemistry 38 (2007): 128-139, doi:10.1016/j.orggeochem.2006.08.003.
    Description: Samples of particulate organic matter from the water column and anoxic Holocene sediment layers from the Small Meromictic Basin (SMB) in Ellis Fjord (eastern Antarctica) were analyzed to study the early incorporation of reduced inorganic sulfur species into highly branched isoprenoid (HBI) alkenes. HBIs were not detected in the water column samples from austral winter, whereas compounds containing the C25 HBI skeleton were abundant in all analyzed Holocene sediment layers. The structure of the C25:2 HBI alkene together with its enriched stable carbon isotopic composition suggest that the HBI alkene is produced by a diatom or diatoms probably belonging to the Navicula genus present in the sea-ice which covers the area most of the year. Within just 500 years of deposition, all of the HBI alkene was sulfurised. A mixture of products was formed, including components tentatively identified as a C25 HBI thiane and three S-containing dimers composed of two C25:1 HBI skeletons linked together by a sulfide bond. Most of the HBI alkene, however, was converted to polar S-containing compounds. The observed reaction rate for sulfurisation the C25:2 HBI alkene is the highest observed so far in natural systems. Sterols and other lipids known to be prone to sulfurisation were only minimally sulfurised under these depositional conditions. The reason for this is presently unclear.
    Description: Funding for the collection of the sediment and water samples (by MJLC and CW) was provided by ASAC grant 1166 to JKV. This work was further supported by a grant from the Netherlands Organization for Scientific Research (NWO; Netherlands Antarctic Research Proposals 851.20.006 to JSSD).
    Keywords: Diatoms ; Thiane ; Euxinic conditions ; Sediment diagenesis ; Kinetics
    Repository Name: Woods Hole Open Access Server
    Type: Preprint
    Format: application/pdf
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    PAPER (OA)
  • 2
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    Identification of organic matter sources in sulfidic late Holocene Antarctic fjord sediments from fossil rDNA sequence analysis (2010)
    American Geophysical Union
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © American Geophysical Union, 2007. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography 22 (2007): PA2211, doi:10.1029/2006PA001309.
    Description: The 18S ribosomal DNA (rDNA) isolated from sulfidic Holocene sediments and particulate organic matter in the water column of the stratified Small Meromictic Basin (SMB) in Ellis Fjord (eastern Antarctica) was analyzed to identify possible biological sources of organic matter. Previous work had shown that the sediments contained numerous diatom frustules and high contents of a highly branched isoprenoid (HBI) C25:2 alkene (which is a specific biomarker of certain species of the diatom genera Navicula, Haslea, Pleurosigma, or Rhizosolenia), so we focused our search on preserved fossil 18S rDNA of diatoms using sensitive polymerase chain reaction (PCR) approaches. We did not find diatom-derived fossil 18S rDNA using general eukaryotic primers, and even when we used primers selective for diatom 18S rDNA, we only identified a Chaetoceros phylotype, which is known to form cysts in the SMB but is not a likely source of the C25:2 HBI. When we used PCR/denaturing gradient gel electrophoresis methods specific to phylotypes within the HBI-biosynthesizing genera, we were able to identify three phylotypes in the sediments related to HBI-producing strains of the genera Haslea and Navicula. The ancient DNA data thus provided a limited, but valuable, view of the diversity of late Holocene primary producers with a particular bias to specific components of the biota that were better preserved such as the Chaetoceros cysts. This use of paleogenetics also revealed unexpected possible sources of organic matter such as novel stramenopiles for which no specific lipid biomarkers are known and thus would not have been identified based on traditional lipid stratigraphy alone.
    Description: Funding for the collection of the sediment and water samples (by M.J.L.C. and C.W.) was provided by the Australian Antarctic Science Advisory Committee (ASAC grant 1166 to J.K.V.). This work was further supported by grants from the Netherlands Organization for Scientific Research (NOW) (Netherlands Antarctic Research Proposals 851.20.020 to M.J.L.C. and 851.20.006 to J.S.S.D.).
    Keywords: Ancient DNA ; Diatoms ; Ellis Fjord
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
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    PAPER (OA)
  • 3
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    Temperature records based on TEX86, TEX86OH, %OH, RI-OH, RI-OH', OHC from sediment core Co1010 (2024)
    PANGAEA
    Details
    Publication Date: 2024-02-17
    Description: Here, we compile an extensive global surface sediment dataset of OH-isoGDGTs as well as regular isoprenoid GDGTs (isoGDGTs), with both data generated at NIOZ and previously published data from other laboratories. We explore recently developed temperature proxies based on hydroxylated isoprenoid Glycerol Dialkyl Glycerol Tetraethers (OH-isoGDGTs), such as %OH, RI-OH, RI-OH' and OHC for their potential for reconstructing past temperature changes. The data contains contains temperature records based on TEX86, TEX86OH, %OH, RI-OH, RI-OH', OHC from sediment core Co1010 which was retrived from the Prydez Bay. This dataset is related to the study 'Evaluating isoprenoidal hydroxylated GDGT-based temperature proxies in surface sediments from the global ocean'.
    Keywords: %OH; Acyclic glycerol dialkyl glycerol tetraether (peak area); AGE; ANT-XXIII/9; Branched and isoprenoid tetraether index; Calculated according to Fietz et al. (2016); Calculated according to Hopmans et al. (2004); De Jonge et al. (2015); Calculated according to Huguet et al. (2013); Calculated according to Lü et al. (2015); Calculated according to Schouten et al. (2002); Co1010; COMPCORE; Composite Core; Crenarchaeol (peak area); Crenarchaeol regio-isomer (peak area); DEPTH, sediment/rock; Dicyclic glycerol dialkyl glycerol tetraether (peak area); Extended tetraether index of 86 carbon atoms with OH-isoGDGTs; Filla Island, Rauer Group, Antarctica; GDGTs; Hydroxide; Hydroxylated acyclic glycerol dialkyl glycerol tetraether (peak area); Hydroxylated dicyclic glycerol dialkyl glycerol tetraether (peak area); hydroxylated GDGTs; Hydroxylated monocyclic glycerol dialkyl glycerol tetraether (peak area); Monocyclic glycerol dialkyl glycerol tetraether (peak area); NIOZ_UU; NIOZ Royal Netherlands Institute for Sea Research, and Utrecht University; OH-GDGTs; paleotemperature proxy; Polarstern; PS69; Ring index of hydroxylated tetraethers RI-OH; Ring index of hydroxylated tetraethers RI-OH'; RI-OH; Sample code/label; Sea surface temperature, annual mean; SST, from TEX86H (Kim et al., 2010); SST, from TEXH86, BAYSPAR (BAYesian SPAtially-varying Regression) (Tierney and Tingley, 2014, 2015); surface sediments; Tetraether index of 86 carbon atoms; Tetraether index of 86 carbon atoms including OH-isoGDGT-0; TEX86; TEX86OH; Tricyclic glycerol dialkyl glycerol tetraether (peak area); Ultra high performance liquid chromatography mass spectrometer (UHPLC-MS)
    Type: Dataset
    Format: text/tab-separated-values, 1308 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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