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  • 1
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    PANGAEA
    In:  Supplement to: Lutze, Gerhard F; Altenbach, Alexander V (1988): Rupertina stabilis (WALLICH), a highly adapted, suspension feeding foraminifer. Meyniana, 40, 55-69, https://doi.org/10.2312/meyniana.1988.40.55
    Publication Date: 2024-02-02
    Description: Rupertina stabilis occupies a depth restricted biotope of suspension feeding animals situated at the Norwegian continental margin. It extends from the Voring plateau northwards for at least 200 - 300 km, in depths between 600 and 800 m. This slope position is known for relatively strong bottom currents and shifting watermass boundaries. - The species is attached to hard substrates, mainly stones or hydroid stalks and obviously prefers an elevated position. It is building a permanent cyst of sponge spicules and debris at the apertural region. The spicules are used to support a pseudopodial network similar to that described from Halyphysema (LIPPS 1983). It is believed to serve as a filter apparatus. - A review of known occurences in the Atlantic is given, suggesting a temperature adaption of the species ranging from 0°C to a maximum of 8°C. Specimens were successfully cultured for about 2-3 weeks.
    Keywords: Date/Time of event; Elevation of event; Event label; Foraminifera, benthic, biomass as carbon; Foraminifera, benthic, standing stock; Giant box corer; GIK23000-2; GIK23014-1; GIK23015-1; GIK23016-1; GIK23022-1; GIK23023-1; GIK23027-1; GIK23076-1; GIK23222; GIK23237; GKG; Latitude of event; Longitude of event; M2/2; Meteor (1986); Norwegian Sea; P284-2; P309-1; P317; P318; POS119; Poseidon; Size fraction 〈 0.063 mm, mud, silt+clay; Size fraction 〉 2 mm, gravel; Size fraction 2.000-0.063 mm, sand; Voring Plateau
    Type: Dataset
    Format: text/tab-separated-values, 48 data points
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    International journal of earth sciences 84 (1995), S. 89-107 
    ISSN: 1437-3262
    Keywords: Paleo-oceanography ; Abrupt climatic change ; Deep-sea micropaleontology ; Late Quaternary ; North Atlantic ; Atlantic Salinity Conveyor Belt
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Quantitative and semiquantitative proxy data based on more than 200 core-top samples and 100 deep-sea cores lead to important new insights about late Quaternary changes in paleo-oceanography, climate and microfaunal habitats in the north-eastern North Atlantic and Nordic Seas, insights resulting from a detailed investigation by the Kiel research project SFB 313/132 summarized in this paper. Planktonic foraminifera species provide reliable tracers of past sea surface temperatures and currents. The genus Beella in particular was found to trace subtropical water masses up to the far north. Benthic foraminifera species served as sensors of bottom currents and local flux rates of organic matter. New orders of time resolution are reached via stable isotope stratigraphy and accelerator mass spectrometry carbon-14 dating, allowing the identification of meltwater events lasting a few hundred years and shorter, a time range where, however, the yet unquantified role of bioturbation presents a growing problem. Based on this high-resolution stratigraphy a number of ‘time slices’ (synoptic time intervals) are defined to reconstruct the incursion of Atlantic water masses, to map paleocurrent patterns within the Nordic Seas and the north-eastern North Atlantic and to test alternative circulation models — for example, for the last glacial maximum (LGM) and various meltwater episodes. These are clearly coeval with Dansgaard-Oeschger events found in Greenland ice cores, with the actual cause of the flickering climate as yet unknown. Likewise, there is ongoing controversy about the extent of past sea-ice cover and about possible changes from the present anti-estuarine to estuarine mode of deep water exchange between the North Atlantic and the Nordic Seas during the LGM. South of Iceland, however, the history of deep water renewal over the last glacial cycle covering the last 30000 years was largely deciphered.
    Type of Medium: Electronic Resource
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  • 3
    Publication Date: 2017-04-10
    Description: Dramatic oceanic changes during the transition from glacial to interglacial conditions had significant effects on pelagic and benthic environments in the Norwegian-Greenland Sea. Fossil marine biota in deep-sea sediments provide the means to reconstruct past oceanographic conditions and climatic fluctuations. Here we present the results of an investigation with high temporal resolution (±200 yr) of four sites distributed along a north-south transect across this high-latitude basin with the aim to decipher timing and regional relocation of water-mass boundaries. Results show that termination I in the Norwegian-Greenland Sea is characterized by a prominent maximum of benthic foraminiferal abundance, which progressively moved northward from the eastern North Atlantic Ocean to Fram Strait at a mean velocity of 0.77 km ṁ yr−1. Benthic foraminiferal accumulation rates during this abundance peak increase from south to north from 184 to 5863 specimens ṁ cm−2 ṁ k.y.−1. We interpret this abundance maximum to be a result of high organic carbon fluxes under a moving high productivity area, on the basis of the progression of climatic amelioration and retreat of sea-ice cover during the gradual deglaciation. The benthic foraminiferal record mirrors this time-transgressive belt directly.
    Type: Article , PeerReviewed
    Format: text
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  • 4
    Publication Date: 2017-06-26
    Description: Abundance, biofacies and ATP content of benthic foraminifera (〉63 μm) were studied in the Northeast Water (NEW) Polynya (77–81°N, 5–17°W) over the ice-free summer, 1993, to investigate how a polynya system might influence the underlying benthic community. In the living assemblage, distinguished by Rose Bengal staining, over 60 taxa could be identified. The biofacies identified was similar to that of other Arctic shelf habitats. Foraminifera were counted in 3 size fractions (63–125 μm, 125–250 μm and 〉250 μm), with 65% of the foraminifera occurring in the smallest size fraction (63–125 μm). Total abundances (〉63 μm) in the uppermost 1 cm averaged approximately 200 ind/10 cm3 and declined down-core, as did the number of species. Abundances and species composition correlated positively with sediment chlorophyll and ATP content, with maxima occurring in the shallower northern regions of the polynya, suggesting a general dependence on food. Foraminera biomass was estimated to be 0.1-0.3 g Corg/m2. Abundances, biomass and ATP content were comparable to ice-free, deep-sea regions in the Norwegian Sea. Temporal changes observed over a 2 month period at one location were difficult to distinguish from spatial and analytical variability. Contrary to expectations, growth was unpronounced at the community and at a species level, implying either a delayed response of the benthic foraminiferal community to food inputs from the overlying water column or the presence of biological limitations other than food, such as predation.
    Type: Article , PeerReviewed
    Format: text
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  • 5
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    Christian-Albrechts-Universität zu Kiel
    In:  Berichte aus dem Sonderforschungsbereich 313, Sedimentation im Europäischen Nordmeer, 8 . Christian-Albrechts-Universität zu Kiel, 211 pp.
    Publication Date: 2019-09-23
    Type: Report , NonPeerReviewed
    Format: text
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  • 6
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    Geologisches Institut der Universität Kiel
    In:  Berichte aus dem Sonderforschungsbereich 313, Sedimentation im Europäischen Nordmeer, 6 . Geologisches Institut der Universität Kiel, 86 pp.
    Publication Date: 2018-12-06
    Type: Report , NonPeerReviewed
    Format: text
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  • 7
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    Institut für Meereskunde der Universität Kiel
    In:  Berichte aus dem Sonderforschungsbereich 313, Sedimentation im Europäischen Nordmeer, 8 . Institut für Meereskunde der Universität Kiel, Kiel, Germany, 213 pp.
    Publication Date: 2020-08-06
    Type: Report , NonPeerReviewed
    Format: text
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  • 8
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    Christian-Albrechts-Universität zu Kiel
    In:  Berichte aus dem Sonderforschungsbereich 313, Sedimentation im Europäischen Nordmeer, 28 . Christian-Albrechts-Universität zu Kiel, 249 pp.
    Publication Date: 2019-09-23
    Type: Report , NonPeerReviewed
    Format: text
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