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  • PANGAEA  (40)
  • Elsevier  (2)
  • American Medical AssociationSpringer  (1)
  • Weinheim : Wiley-VCH  (1)
Document type
Keywords
Publisher
Language
Years
  • 1
    Book
    Book
    Deutsche Forschung in der Antarktis : wissenschaftlicher Fortschritt und Perspektiven ; Denkschrift (2005)
    Weinheim : Wiley-VCH
    Details Availability
    Keywords: Anarctica ; Geologie ; Forschungsbericht ; Antarktis ; Geologie ; Antarktis ; Klimaänderung ; Antarktis ; Kreislauf ; Antarktisforschung ; Deutschland ; Antarktis ; Antarktisforschung ; Geowissenschaften ; Biowissenschaften ; Umweltwissenschaften
    Type of Medium: Book
    Pages: XXI, 211 S. , Ill., graph. Darst., Kt. , 8°
    ISBN: 352731251X
    Series Statement: Denkschrift / Deutsche Forschungsgemeinschaft
    URL: http://www.gbv.de/dms/bs/toc/390983209.pdf
    URL: http://www.gbv.de/dms/faz-rez/FNUW20050309108439.pdf
    DDC: 500
    RVK:
    RY 70041
    RVK:
    RY 70053
    RVK:
    WI 9470
    Language: German
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  • 2
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    Tergipes antarcticus (Gastropoda, Nudibranchia): distribution, life cycle, morphology, anatomy and adaptation of the first mollusc known to live in Antarctic sea ice (2008)
    American Medical AssociationSpringer
    In:  Polar Biolog, 31 (11). pp. 1383-1395.
    Details
    Publication Date: 2019-07-31
    Description: Tergipes antarcticus (Gastropoda, Nudibranchia) has been reported from Antarctic sea ice twice (1903 and 2008). The extent of its distribution and life history remained unclear. We have evaluated data from several cruises, showing that T. antarcticus is widely distributed in sea ice throughout the Weddell Sea. Adults, juveniles, larvae and egg clutches of T. antarcticus were found in the ice indicating that the species reproduces within this habitat. We collected live material of T. antarcticus for a thorough description of all life stages and to investigate the developmental stages and physiological adaptations. Total developmental time from egg to veliger larvae was relatively short with 31 days (range 13–65 days) at 0°C. Liquid withdrawn from egg clutches and adult T. antarcticus showed clear signs of thermal hysteresis. This is the first report of thermal hysteresis from a sea ice metazoan. We conclude that T. antarcticus is an autochthonous species to Antarctic sea ice.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s00300-008-0478-0
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    Morphological and physiological responses of Globigerinoides sacculifer (Brady) under varying laboratory conditions (1987)
    Elsevier
    In:  Marine Micropaleontology, 12 . pp. 305-324.
    Details
    Publication Date: 2016-10-07
    Description: The planktonic foraminifer Globigerinoides sacculifer (Brady) was maintained in the laboratory under different temperature (19.5-29.5°C) and salinity (33 and 36‰) regimes. The light and feeding conditions were adjusted to the open ocean environment. The light intensity and quality corresponded to a water depth of 10-30 m and the specimens were fed daily. Specimens were raised from a mean initial size of approximately 220-240 μm to the reproductive mean size ranging from 521 μm to 657 μm according to the different temperature and salinity regimes. The survival time decreased with increasing temperature relatively independent of salinity. The growth rate decreased with decreasing temperatures but significantly only at the lowermost temperature range. The general vitality increased with increasing salinity, partially indicated by more chamber formations of specimens of the 36‰ salinity group in comparison to those of the 33‰ salinity group. The different phenotypes of the final chamber and the different morphologies of G. sacculifer are discussed.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/0377-8398(87)90025-9
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    A critical evaluation of calcium isotope ratios in tests of planktonic foraminifers (2009)
    Elsevier
    In:  Geochimica et Cosmochimica Acta, 73 (24). pp. 7241-7255.
    Details
    Publication Date: 2017-09-27
    Description: We critically evaluate the applicability of Ca-isotope ratios in planktonic foraminifers as proxy for past sea surface temperatures (SST) and isotope composition of paleo-seawater (δ44Casw) reconstructions. Previous studies have shown discrepancies regarding the temperature sensitivity of Ca isotope fractionation in foraminifers of more than one order of magnitude. We present new data from the planktonic foraminifer species Orbulina universa, Globigerinoides sacculifer and Neogloboquadrina pachyderma (sinistral) from culture experiments, multinet deployments and coretop samples. Specimens of G. sacculifer cultured at low salinities (33–34.5) show predominantly no major temperature dependent Ca isotope fractionation, in contrast to previous individuals cultured at higher salinities of 34.5–36. The new data of O. universa are consistent with previously published results, revealing a small but significant temperature sensitivity. Calcium isotope fractionation in tests of N. pachyderma shows a significant variation with temperature, which is not uniform over the total investigated temperature range (−1.6 °C to +10 °C), possibly reflecting the influence of additional controlling factors besides temperature. Controlled dissolution experiments in the laboratory indicate that the Ca-isotope composition of G. sacculifer and N. pachyderma is relatively insensitive to partial dissolution of their tests. Calcium isotope ratios in the planktonic foraminifers G. sacculifer and N. pachyderma (s) reveal a complex Ca isotope fractionation behaviour, which is not yet fully understood. Additional validation studies are crucial to enhance the basic understanding of the calcium isotope systematics in planktic foraminifer shells, and the potential for applying Ca-isotope ratios as proxies for seawater temperature and the oceanic Ca budget.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.gca.2009.08.035
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 5
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    Lebensraum und Fortpflanzung der Großforaminifere Cyclorbiculina compressa (Film)
    PANGAEA
    In:  MARUM - Center for Marine Environmental Sciences, University Bremen
    Details
    Publication Date: 2023-05-12
    Keywords: Comment; File format; File size; SFB95; Uniform resource locator/link to movie; Wechselwirkung Meer-Meeresboden (Interaction Sea-Sea Bottom)
    Type: Dataset
    Format: text/tab-separated-values, 24 data points
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    DATA PANGAEA
  • 6
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    25 Jahre Alfred-Wegener-Institut für Polar- und Meeresforschung (poster) (2005)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-09-01
    Type: Dataset
    Format: application/zip, 11.5 MBytes
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    DATA PANGAEA
  • 7
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    Weight of C. wuellerstorfi tests according to other properties at sediment core GIK23519-5 (2005)
    PANGAEA
    Details
    Publication Date: 2024-02-03
    Keywords: Chamber number; Comment; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Diameter, maximum; GIK/IfG; GIK23519-5; Gravity corer (Kiel type); Greenland Sea; Impact of Gateways on Ocean Circulation, Climate, and Evolution; Institute for Geosciences, Christian Albrechts University, Kiel; Mass; OceanGateways; Ocean Gateways; POS210/2; Poseidon; SL; Species
    Type: Dataset
    Format: text/tab-separated-values, 581 data points
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    DATA PANGAEA
  • 8
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    Properties of C. wuellerstorfi at sediment core GIK23519-5 (2005)
    PANGAEA
    Details
    Publication Date: 2024-02-03
    Keywords: Chamber number; Comment; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Diameter, maximum; GIK/IfG; GIK23519-5; Gravity corer (Kiel type); Greenland Sea; Impact of Gateways on Ocean Circulation, Climate, and Evolution; Institute for Geosciences, Christian Albrechts University, Kiel; Light microscope; OceanGateways; Ocean Gateways; POS210/2; Poseidon; Size fraction; SL; Species
    Type: Dataset
    Format: text/tab-separated-values, 1323 data points
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    DATA PANGAEA
  • 9
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    Morphometry of Cibicidoides wuellerstorfi from sediment core GIK23519-5 (2005)
    PANGAEA
    Details
    Publication Date: 2024-02-03
    Keywords: Chamber number; Comment; Depth, bottom/max; DEPTH, sediment/rock; Diameter; GIK/IfG; GIK23519-5; Gravity corer (Kiel type); Greenland Sea; Impact of Gateways on Ocean Circulation, Climate, and Evolution; Institute for Geosciences, Christian Albrechts University, Kiel; OceanGateways; Ocean Gateways; POS210/2; Poseidon; Size fraction; SL; Species
    Type: Dataset
    Format: text/tab-separated-values, 1114 data points
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  • 10
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    Carbon analysis of surface sediments from the Laptev Se (2001)
    PANGAEA
    In:  Supplement to: Fahl, Kirsten; Cremer, Holger; Erlenkeuser, Helmut; Hanssen, Hinrich; Hölemann, Jens A; Kassens, Heidemarie; Knickmeier, Karin; Kosobokova, Ksenia N; Kunz-Pirrung, Martina; Lindemann, Frank; Markhaseva, Elena; Lischka, Silke; Petryashov, Victor; Piepenburg, Dieter; Schmid, Michael K; Spindler, Michael; Stein, Ruediger; Tuschling, Kirsten (2001): Sources and pathways of organic carbon in the modern Laptev Sea (Arctic Ocean): implications from biological, geochemical and geological data. Polarforschung, 69, 193-205, hdl:10013/epic.29844.d001
    Details
    Publication Date: 2024-04-16
    Description: During the past six years organic geochemical, micropaleontological, and sedimentological investigations were carried out within the framework of the multidisciplinary bilateral German-Russian research project ''System Laptev Sea'' and detailed biological investigations within the project ''German-Russian Investigations of the Marginal Seas of the Eurasian Arctic'', In order to understand the Laptev Sea ecosystem and to obtain information about sources and fate of organic carbon, the distribution of phyto- and zooplankton, diatoms, chlorophyll a benthic macrofauna, palynomorphs, grain size, total organic carbon, d13Corg and biomarkers (n-alkanes, fatty acids) were determined. In general, the influence of the major rivers draining into the Laptev Sea, is reflected in the water column as well as in the surface sediments. In both habitats three ecological provinces can be distinguished, i.e., the southeastern Laptev Sea, the central Laptev Sea, and the northern Laptev Sea. Additionally, clear differences between the western and the eastern Laptev Sea occur. The comparison of the different data sets of the water column and the surface sediments provide information about organic carbon sources and pathways in the Laptev Sea shelf and continental slope area.
    Keywords: AWI_Paleo; BCR; Box corer (Reineck); Carbon, organic, total; CTD/Rosette; CTD-RO; DEPTH, sediment/rock; Element analyser CHN, LECO CNS 2000; Elevation of event; Event label; GEOMAR; Giant box corer; GKG; Grab; GRAB; Helmholtz Centre for Ocean Research Kiel; IK9301-6; IK9306-6; IK9309-4; IK9313-6; IK9315-1; IK9316-6; IK9318-3; IK9320-1; IK9321-5; IK9323-6; IK9324-4; IK9330-2; IK9334-7; IK9338-5; IK9340-6; IK9342-6; IK9344-8; IK9346-4; IK9348-6; IK9353-9; IK9356-2; IK9358-5; IK9365-6; IK9367-2; IK9370-12; IK9371-1; IK9373-8; IK9373A-6; IK9382-6; IK9384-1; IK93K1-1; IK93K2-1; IK93Z3-3; IK93Z4-4; IK93Z5-3; Isotope ratio mass spectrometry; Ivan Kireyev; Kapitan Dranitsyn; KD9502-12; KD9509-6; KD9510-3; KD9517-3; KD9523-7; KD9529-11; KD9533-10; KD9541-12; KD9548-11; KD9555-10; KD9560-5; KD9561-3; KD9565-11; KD9568-7; KD9572-1; Laptev Sea; LATITUDE; Lena Nordenskøld Station; LN9604-8; LN9604-9; LN9605-8; LN9605-9; LN9606-10; LN9606-9; LN9608-12; LN9609-14; LN9610-11; LN9611-12; LN9612-8; LN9613-8; LN9614-7; LN9615-5; LN9616-7; LN9617-8; LN9618-8; LN9619-9; LN9620-12; LN9621-11; LN9622-8; LN9623-10; LN9624-10; LN9625-10; LONGITUDE; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Photo/Video; PM9402-3; PM9417-4; PM9441-4; PM9442-3; PM9462-1; PM9463-8; PM9475-3; PM9481-2; PM9482-1; PM9492-3; PM9494-5; PM9499-1; Professor Multanovskiy; PV; Quaternary Environment of the Eurasian North; QUEEN; Siberian River Run-Off; SIRRO; Transdrift-I; Transdrift-II; Transdrift-III; Transdrift-IV; van Veen Grab; VGRAB; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 170 data points
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    DATA PANGAEA
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