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  • 1
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    Cryogenian evolution of stigmasteroid biosynthesis (2017)
    American Association Advancement Science
    In:  EPIC3Science Advances, American Association Advancement Science, 3(9), pp. e1700887, ISSN: 2375-2548
    Details
    Publication Date: 2021-06-09
    Description: Sedimentary hydrocarbon remnants of eukaryotic C26–C30 sterols can be used to reconstruct early algal evo- lution. Enhanced C29 sterol abundances provide algal cell membranes a density advantage in large temperature fluctuations. Here, we combined a literature review with new analyses to generate a comprehensive inventory of unambiguously syngenetic steranes in Neoproterozoic rocks. Our results show that the capacity for C29 24- ethyl-sterol biosynthesis emerged in the Cryogenian, that is, between 720 and 635 million years ago during the Neoproterozoic Snowball Earth glaciations, which were an evolutionary stimulant, not a bottleneck. This bio- chemical innovation heralded the rise of green algae to global dominance of marine ecosystems and highlights the environmental drivers for the evolution of sterol biosynthesis. The Cryogenian emergence of C29 sterol biosynthesis places a benchmark for verifying older sterane signatures and sets a new framework for our understanding of early algal evolution.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Location Call Number Limitation Availability
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    PAPER (OA)
  • 2
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    Core-top calibration of the lipid-based UK'37 and TEX86 temperature proxies on the southern Italian shelf (SW Adriatic Sea, Gulf of Taranto) (2010)
    ELSEVIER SCIENCE BV
    In:  EPIC3Earth and Planetary Science Letters, ELSEVIER SCIENCE BV, 300, pp. 112-124, ISSN: 0012-821X
    Details
    Publication Date: 2019-07-17
    Description: The Mediterranean Sea is at the transition between temperate and tropical air masses and as such of importance for studying climate change. The Gulf of Taranto and adjacent SW Adriatic Sea are at the heart of this region. Their sediments are excellently suited for generating high quality environmental records for the last millennia with a sub-decadal resolution. The quality of these records is dependent on a careful calibration of the transfer functions used to translate the sedimentary lipid signals to the local environment. Here, we examine and calibrate the UK′37 and TEX86 lipid-based temperature proxies in 48 surface sediments and relate these to ambient sea surface temperatures and other environmental data. The UK′37 -based temperatures in surface sediments reflect winter/spring sea surface temperatures in agreement with other studies demonstrating maximum haptophyte production during the colder season. The TEX86-based temperatures for the nearshore sites also reflect winter sea surface temperatures. However, at the most offshore sites, they correspond to summer sea surface temperatures. Additional lipid and environmental data including the distribution of the BIT index and remote-sensed chlorophyll-a suggest a shoreward increase of the impact of seasonal and spatial variability in nutrients and control of planktonic archaeal abundance by primary productivity, particle loading in surface waters and/or overprint by a cold-biased terrestrial TEX86 signal. As such the offshore TEX86 values seem to reflect a true summer signal to the effect that offshore UK′37 and TEX86 reconstruct winter and summer temperature, respectively, and hence provide information on the annual temperature amplitude.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
    Location Call Number Limitation Availability
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    PAPER (OA)
  • 3
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    Distribution and stable isotopic compositions of hydrogen and carbon of plant-wax derived n-C29 and -C31 alkanes in terrestrial, coastal and offshore surface sediments (2013)
    PANGAEA
    In:  Supplement to: Leider, Arne; Hinrichs, Kai-Uwe; Schefuß, Enno; Versteegh, Gerard J M (2013): Distribution and stable isotopes of plant wax derived n-alkanes in lacustrine, fluvial and marine surface sediments along an Eastern Italian transect and their potential to reconstruct the hydrological cycle. Geochimica et Cosmochimica Acta, 117, 16-32, https://doi.org/10.1016/j.gca.2013.04.018
    Details
    Publication Date: 2023-03-03
    Description: Reconstructing terrestrial water budgets is of prime importance for understanding past climate and environment. To shed more light on how plant-wax derived n-alkanes may be used for this purpose we investigated the distribution and stable isotopic compositions of hydrogen (dD) and carbon (d13C) of plant-wax derived n-C29 and -C31 alkanes in terrestrial, coastal and offshore surface sediments in relation to hydrology along a NW-SE transect east of the Italian Apennines from the Po River to the Eastern Gulf of Taranto. The plant wax average chain length increases southward and may relate to increasing temperature and/or aridity. The plant wax dD of the terrestrial and coastal samples also increases southward and mainly reflects changes in the dD of precipitation. The d13C of plant waxes is primarily interpreted in terms of C3 vegetation changes rather than varying contributions by C4 plants. The plant wax d13C-dD composition of the Po River and Apennine rivers differs considerably from that in southern Italy, and suggests a mainly southern source for plant waxes in marine sediments of the Gulf of Taranto. This calibration provides a basis for the reconstruction of past changes in the Italian water balance and n-alkane source areas.
    Keywords: Center for Marine Environmental Sciences; MARUM
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    GDGT analyses for core-top sediments from the southern Adriatic Sea (2013)
    PANGAEA
    Details
    Publication Date: 2023-03-03
    Keywords: 666; 668; 670; 671; 673; 674; 675; 676; 677; 678; 680; 681; 682; 683; 684; 685; 686; 687; 689; 690; 691; 692; 693; 694; 695; 696; 697; 699; 700; 701; 702; 703; 704; 705; 706; 707; 708; 709; 710; 712; 713; 714; 716; 717; 718; 719; Acyclic glycerol dialkyl glycerol tetraether, fractional abundance; Center for Marine Environmental Sciences; Crenarchaeol, fractional abundance; Crenarchaeol regio-isomer, fractional abundance; DEPTH, sediment/rock; Dicyclic glycerol dialkyl glycerol tetraether, fractional abundance; Event label; Gargano Promontory; GeoB10701-4; GeoB10703-3; GeoB10704-3; GeoB10705-3; GeoB10707-4; GeoB10708-3; GeoB10709-4; GeoB10710-4; GeoB10711-3; GeoB10712-3; GeoB10713-3; GeoB10714-3; GeoB10715-3; GeoB10716-3; GeoB10717-3; GeoB10718-3; GeoB10719-3; GeoB10720-5; GeoB10721-3; GeoB10722-3; GeoB10723-3; GeoB10724-3; GeoB10725-3; GeoB10726-3; GeoB10727-3; GeoB10728-3; GeoB10729-4; GeoB10730-3; GeoB10731-3; GeoB10732-3; GeoB10733-3; GeoB10734-3; GeoB10735-3; GeoB10736-3; GeoB10737-3; GeoB10738-3; GeoB10739-3; GeoB10740-3; GeoB10741-3; GeoB10742-3; GeoB10743-3; GeoB10744-3; GeoB10746-3; GeoB10747-3; GeoB10748-3; GeoB10749-3; Gulf of Manfredonia; Gulf of Taranto; High Performance Liquid Chromatography (HPLC-APCI-MS); MARUM; Monocyclic glycerol dialkyl glycerol tetraether, fractional abundance; MUC; MultiCorer; POS339; Poseidon; Strait of Otranto; Tricyclic glycerol dialkyl glycerol tetraether, fractional abundance
    Type: Dataset
    Format: text/tab-separated-values, 276 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    (Electronic Annex 1) Relative abundance of n-C25 to n-C33 alkanes at coastal terrestrial stations from northern to southern Italy and marine core tops at the southern Italian shelf (2013)
    PANGAEA
    Details
    Publication Date: 2023-03-03
    Keywords: 666; 667; 668; 670; 671; 672; 673; 674; 675; 676; 677; 678; 680; 681; 682; 683; 684; 685; 686; 687; 689; 690; 691; 692; 693; 694; 695; 696; 697; 699; 700; 701; 702; 703; 704; 705; 706; 707; 708; 709; 710; 712; 713; 714; 716; 717; 718; 719; Area/locality; Center for Marine Environmental Sciences; Cervaro river; DEPTH, sediment/rock; Elevation of event; Event label; Foglia river; Gallipoli Beach; Gargano Promontory; Gas chromatography - Flame Ionization Detection (GC-FID); GeoB10701-4; GeoB10702-3; GeoB10703-3; GeoB10704-3; GeoB10705-3; GeoB10706-3; GeoB10707-4; GeoB10708-3; GeoB10709-4; GeoB10710-4; GeoB10711-3; GeoB10712-3; GeoB10713-3; GeoB10714-3; GeoB10715-3; GeoB10716-3; GeoB10717-3; GeoB10718-3; GeoB10719-3; GeoB10720-5; GeoB10721-3; GeoB10722-3; GeoB10723-3; GeoB10724-3; GeoB10725-3; GeoB10726-3; GeoB10727-3; GeoB10728-3; GeoB10729-4; GeoB10730-3; GeoB10731-3; GeoB10732-3; GeoB10733-3; GeoB10734-3; GeoB10735-3; GeoB10736-3; GeoB10737-3; GeoB10738-3; GeoB10739-3; GeoB10740-3; GeoB10741-3; GeoB10742-3; GeoB10743-3; GeoB10744-3; GeoB10746-3; GeoB10747-3; GeoB10748-3; GeoB10749-3; Gulf of Manfredonia; Gulf of Taranto; Lago Alimini Grande; Lago di Bomba; Lago di Monticchio; Latitude of event; Longitude of event; M1; M10; M11; M13; M14; M15; M18; M19; M2; M22; M25; M27; M28; M3; M30; M5; M8; Manfredonia Lido; MARUM; MUC; MultiCorer; n-Alkane C25 of total alkanes; n-Alkane C26 of total alkanes; n-Alkane C27 of total alkanes; n-Alkane C28 of total alkanes; n-Alkane C29 of total alkanes; n-Alkane C30 of total alkanes; n-Alkane C31 of total alkanes; n-Alkane C32 of total alkanes; n-Alkane C33 of total alkanes; Ofanto river; Po della Donzella; Po di Goro; Po di Goro harbour; Porto Cesareo; Porto Recanati; POS339; Poseidon; Potenza river; Punta della Penna; Reno river; Strait of Otranto; Type; Vomano river
    Type: Dataset
    Format: text/tab-separated-values, 713 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    (Table 1) Alkenones and GDGT analysis for core-top sediments from the southern Adriatic Sea
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: 666; 667; 668; 670; 671; 672; 673; 674; 675; 676; 677; 678; 680; 681; 682; 683; 684; 685; 686; 687; 689; 690; 691; 692; 693; 694; 695; 696; 697; 699; 700; 701; 702; 703; 704; 705; 706; 707; 708; 709; 710; 712; 713; 714; 716; 717; 718; 719; Alkenone, unsaturation index UK'37; Alkenone per unit sediment mass; Branched and isoprenoid tetraether index; Calculated, see reference(s); Calculated from C37 alkenones (Prahl & Wakeham, 1987); Calculated from TEX86 (Kim et al., 2008); Calculated from UK37 (Conte et al., 2006); Carbon, organic, total; Center for Marine Environmental Sciences; Chlorophyll a; DEPTH, sediment/rock; Elevation of event; Event label; Gargano Promontory; Gas chromatography (Finnigan Thermosquest Trace GC); GeoB10701-4; GeoB10702-3; GeoB10703-3; GeoB10704-3; GeoB10705-3; GeoB10706-3; GeoB10707-4; GeoB10708-3; GeoB10709-4; GeoB10710-4; GeoB10711-3; GeoB10712-3; GeoB10713-3; GeoB10714-3; GeoB10715-3; GeoB10716-3; GeoB10717-3; GeoB10718-3; GeoB10719-3; GeoB10720-5; GeoB10721-3; GeoB10722-3; GeoB10723-3; GeoB10724-3; GeoB10725-3; GeoB10726-3; GeoB10727-3; GeoB10728-3; GeoB10729-4; GeoB10730-3; GeoB10731-3; GeoB10732-3; GeoB10733-3; GeoB10734-3; GeoB10735-3; GeoB10736-3; GeoB10737-3; GeoB10738-3; GeoB10739-3; GeoB10740-3; GeoB10741-3; GeoB10742-3; GeoB10743-3; GeoB10744-3; GeoB10746-3; GeoB10747-3; GeoB10748-3; GeoB10749-3; Gulf of Manfredonia; Gulf of Taranto; Latitude of event; Longitude of event; MARUM; MUC; MultiCorer; POS339; Poseidon; Sea surface salinity; Sea surface temperature; Sea surface temperature, annual mean; Sea surface temperature, autumn; Sea surface temperature, spring; Sea surface temperature, summer; Sea surface temperature, winter; see reference(s); Strait of Otranto; Tetraether index of 86 carbon atoms
    Type: Dataset
    Format: text/tab-separated-values, 973 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    (Table S1) Comparison of TEX86 indices and derived temperatures based on the calibrations from Kim et al. (2008, 2010) for core-top sediments from the southern Adriatic Sea
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: 666; 667; 668; 670; 671; 672; 673; 674; 675; 676; 677; 678; 680; 681; 682; 683; 684; 685; 686; 687; 689; 690; 691; 692; 693; 694; 695; 696; 697; 699; 700; 701; 702; 703; 704; 705; 706; 707; 708; 709; 710; 712; 713; 714; 716; 717; 718; 719; Calculated from TEX86 (Kim et al., 2008); Calculated from TEX86 (Kim et al., 2010); Center for Marine Environmental Sciences; DEPTH, sediment/rock; Elevation of event; Event label; Gargano Promontory; GeoB10701-4; GeoB10702-3; GeoB10703-3; GeoB10704-3; GeoB10705-3; GeoB10706-3; GeoB10707-4; GeoB10708-3; GeoB10709-4; GeoB10710-4; GeoB10711-3; GeoB10712-3; GeoB10713-3; GeoB10714-3; GeoB10715-3; GeoB10716-3; GeoB10717-3; GeoB10718-3; GeoB10719-3; GeoB10720-5; GeoB10721-3; GeoB10722-3; GeoB10723-3; GeoB10724-3; GeoB10725-3; GeoB10726-3; GeoB10727-3; GeoB10728-3; GeoB10729-4; GeoB10730-3; GeoB10731-3; GeoB10732-3; GeoB10733-3; GeoB10734-3; GeoB10735-3; GeoB10736-3; GeoB10737-3; GeoB10738-3; GeoB10739-3; GeoB10740-3; GeoB10741-3; GeoB10742-3; GeoB10743-3; GeoB10744-3; GeoB10746-3; GeoB10747-3; GeoB10748-3; GeoB10749-3; Gulf of Manfredonia; Gulf of Taranto; Latitude of event; Longitude of event; MARUM; MUC; MultiCorer; POS339; Poseidon; Sea surface temperature; see reference(s); Strait of Otranto; Tetraether index of 86 carbon atoms
    Type: Dataset
    Format: text/tab-separated-values, 276 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Alkenones and TEX86 temperature proxies for core-top sediments from the southern Adriatic Sea
    PANGAEA
    In:  Supplement to: Leider, Arne; Hinrichs, Kai-Uwe; Mollenhauer, Gesine; Versteegh, Gerard J M (2010): Core-top calibration of the lipid-based U-37(K)' and TEX86 temperature proxies on the southern Italian shelf (SW Adriatic Sea, Gulf of Taranto). Earth and Planetary Science Letters, 300(1-2), 112-124, https://doi.org/10.1016/j.epsl.2010.09.042
    Details
    Publication Date: 2023-05-12
    Description: The Mediterranean Sea is at the transition between temperate and tropical air masses and as such of importance for studying climate change. The Gulf of Taranto and adjacent SW Adriatic Sea are at the heart of this region. Their sediments are excellently suited for generating high quality environmental records for the last millennia with a sub-decadal resolution. The quality of these records is dependent on a careful calibration of the transfer functions used to translate the sedimentary lipid signals to the local environment. Here, we examine and calibrate the UK'37 and TEX86 lipid-based temperature proxies in 48 surface sediments and relate these to ambient sea surface temperatures and other environmental data. The UK'37-based temperatures in surface sediments reflect winter/spring sea surface temperatures in agreement with other studies demonstrating maximum haptophyte production during the colder season. The TEX86-based temperatures for the nearshore sites also reflect winter sea surface temperatures. However, at the most offshore sites, they correspond to summer sea surface temperatures. Additional lipid and environmental data including the distribution of the BIT index and remote-sensed chlorophyll-a suggest a shoreward increase of the impact of seasonal and spatial variability in nutrients and control of planktonic archaeal abundance by primary productivity, particle loading in surface waters and/or overprint by a cold-biased terrestrial TEX86 signal. As such the offshore TEX86 values seem to reflect a true summer signal to the effect that offshore UK'37 and TEX86 reconstruct winter and summer temperature, respectively, and hence provide information on the annual temperature amplitude.
    Keywords: 666; 667; 668; 670; 671; 672; 673; 674; 675; 676; 677; 678; 680; 681; 682; 683; 684; 685; 686; 687; 689; 690; 691; 692; 693; 694; 695; 696; 697; 699; 700; 701; 702; 703; 704; 705; 706; 707; 708; 709; 710; 712; 713; 714; 716; 717; 718; 719; Center for Marine Environmental Sciences; Gargano Promontory; GeoB10701-4; GeoB10702-3; GeoB10703-3; GeoB10704-3; GeoB10705-3; GeoB10706-3; GeoB10707-4; GeoB10708-3; GeoB10709-4; GeoB10710-4; GeoB10711-3; GeoB10712-3; GeoB10713-3; GeoB10714-3; GeoB10715-3; GeoB10716-3; GeoB10717-3; GeoB10718-3; GeoB10719-3; GeoB10720-5; GeoB10721-3; GeoB10722-3; GeoB10723-3; GeoB10724-3; GeoB10725-3; GeoB10726-3; GeoB10727-3; GeoB10728-3; GeoB10729-4; GeoB10730-3; GeoB10731-3; GeoB10732-3; GeoB10733-3; GeoB10734-3; GeoB10735-3; GeoB10736-3; GeoB10737-3; GeoB10738-3; GeoB10739-3; GeoB10740-3; GeoB10741-3; GeoB10742-3; GeoB10743-3; GeoB10744-3; GeoB10746-3; GeoB10747-3; GeoB10748-3; GeoB10749-3; Gulf of Manfredonia; Gulf of Taranto; MARUM; MUC; MultiCorer; POS339; Poseidon; Strait of Otranto
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    (Figure 6) Concentrations of Glc-branched-GDGT, GlcA-branched-GDGT, 2Gly-isoprenoid-GDNT, PME-DAG, PE-DEG, sum of archaeal IPLs, sum of bacterial IPLs, sum of total IPLs, core lipids of branched and isoprenoidal GDGTs in Bullenmoor peat bog (2010)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 2glycosidic-isoprenoid-glycerol dibiphytanyl nonitol tetraether; Branched glycerol dialkyl glycerol tetraether core lipids; Bullenmoor; Center for Marine Environmental Sciences; DEPTH, sediment/rock; Eijkelkamp Kammerbohrer; EKB; Glycerol dialkyl glycerol tetraethers, glucoronic acid; Glycerol dialkyl glycerol tetraethers, glucose branched; Isoprenoid glycerol dialkyl glycerol tetraether core lipids; MARUM; Phosphoethanolamine-Dietherglycerophospholipid; Phospho methyl ethanolamine-Diacylglycerophospholipid; Sample ID; see reference(s); Stader Geest, Lower Saxony, Northern Germany; Sum archaeal intact polar lipids; Sum bacterial intact polar lipids; Sum total intact polar lipids
    Type: Dataset
    Format: text/tab-separated-values, 165 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    (Figure 1) Redox potential and pH of sediment samples from Bullenmoor peat bog, Northern Germany (2010)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Bullenmoor; Center for Marine Environmental Sciences; DEPTH, sediment/rock; Eijkelkamp Kammerbohrer; EKB; Hamilton double pore probes; MARUM; Oxidation reduction (RedOx) potential; pH; Stader Geest, Lower Saxony, Northern Germany
    Type: Dataset
    Format: text/tab-separated-values, 22 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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