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  • 1995-1999  (15)
Document type
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Seasonal shifts in ice edge phytoplankton blooms in the Barents Sea related to the water column stability (1996)
    Springer
    Polar biology 16 (1996), S. 409-422 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The development of the phytoplankton bloom and its relation to water column stabilisation during the transition from early to high summer (of 1991) in the seasonally ice-covered zone of the Barents Sea were studied from a meridional transect of repeated hydrographic/biological stations. The water column stabilisation is described in detail with the aid of vertical profiles of the Brunt-Väisälä frequency squared (N2). The contributions of seasonal warming and ice melting to stabilisation are elucidated by determining the effects of temperature and salinity on N2. The spring bloom in 1991 migrated poleward from June to July by about 400 km, associated with the retreat of the ice edge. The spring bloom culminated with maximum chlorophyll concentrations in the mixed layer about 100–300 km north of the centre of the meltwater lens, at its northern edge, where the ice cover was still substantial. From the distribution of N2 it becomes obvious that the bloom starts at the very beginning of stabilisation, which results solely from the release of meltwater. The increase in temperature due to the seasonal warming does not contribute to the onset of vernal blooming; temperature starts to contribute to the stratification later, when the spring bloom has ceased due to the exhaustion of nutrients in the mixed layer. By that time a deep chlorophyll maximum has formed in the seasonal pycnocline, 20–30 m below the base of the mixed layer. The effect of the seasonal ice cover on the mean areal new primary production is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003000050072
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    Paper (German National Licenses)
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  • 2
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    Pelagic-benthic coupling in the Laptev Sea affected by sea ice (1999)
    In:  EPIC3Land-ocean systems in the Siberian Arctic: Dynamics and history (H Kassens, H A Bauch, I Dmitrenko, H Eicken, H-W Hubberten, M Melles, J Thiede, L A Timokhov, eds ) Lecture notes in earth science, Springer, Berlin, pp. 143-152
    Details
    Publication Date: 2014-09-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Inbook , peerRev
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  • 3
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    Tracing dissolved organic substances and nutrients from the Lena River through Laptev Sea (Arctic) (1999)
    In:  EPIC3Marine Chemistry, 65, pp. 25-39
    Details
    Publication Date: 2019-07-16
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 4
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    Das einzellige Plankton im Ozean der Arktis und Antarktis (1995)
    In:  EPIC3Biologie der Polarmeere Erlebnisse und Ergebnisse (I Hempel, G Hempel, Hrsg ) G Fischer, Jena, pp. 116-127
    Details
    Publication Date: 2014-04-15
    Repository Name: EPIC Alfred Wegener Institut
    Type: Inbook , peerRev
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  • 5
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    Phytoplankton and particulate matter at the Weddell/Scotia Confluence (47°W) (1997)
    In:  EPIC3Polar biology, 18, pp. 1-9
    Details
    Publication Date: 2019-07-16
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 6
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    Spatial variability of phytoplankton and new production in the waters around Sv (1998)
    In:  EPIC3The Arctic and Global Change, Proceedings of the Fourth Ny-Ålesund Seminar, Ravello, Italy, 1998 (R. Casacchia, H. Koutsileos, M. Morbidoni, P. D. Petrelli, M. R. Pettersen, R. Salvatori, R. Sparapani, E. Stoltz Larsen, eds.), Italian National Research Co, pp. 193-196
    Details
    Publication Date: 2019-07-16
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 7
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    Vertical particle flux on the shelf off northern Spitsbergen, Norway (1996)
    In:  EPIC3Marine ecology-progress series, 137, pp. 215-228
    Details
    Publication Date: 2019-07-16
    Description: Suspended and sedimented particulate matter was examined alongtransects on the continental shelf off northern Spitsbergen, Norway, during summer1991. The transects were situated in non-ice-covered areas dominated by Atlanticwater, areas with multi-year ice and the marginal ice zone. The variability of thesedimented matter with regard to composition, quantity and quality between the 7investigated stations was considerable. The open Atlantic water showed the highestsuspended biomass [100 to 280 mg particulate organic carbon (POC) m-3] and thevertical flux was moderate (24 to 30 mg POC m-2 d-1) and dominated by faecalmatter. While the suspended biomass in areas covered by multi-year ice was low(&LT65 mg POC m-3), the vertical flux was relatively high (18 to 76 mg POC m-2d-1) and dominated by terrestrial organic and faecal matter. The contribution ofphytoplankton cells to the vertical flux of POC was small in areas covered bymulti-year ice, on average about 1%. The contribution of phytoplankton cells to thevertical flux in the marginal ice zone was higher (5.6% of POC), consisting mainlyof Chaetoceros socialis and Fragilariopsis sp., but a considerable amount of faecalmatter also settled. At all stations zooplankton strongly influenced the vertical flux,not only by faecal pellet production but probably also by direct mediation of fluxes(e.g. coprophagy).
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 8
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    Biological control of particle flux in polar oceans Arctic and Antarctic (1998)
    In:  EPIC3eingeladener Vortrag International Symposium on polar aspects of global change, Norway.
    Details
    Publication Date: 2019-07-16
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 9
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    The onset of biological winter in the eastern Weddell Gyre (Antarctica) planktonic community (1996)
    In:  EPIC3Journal of marine systems, 9, pp. 211-230
    Details
    Publication Date: 2019-07-16
    Description: Data on hydrography, phyto- and zooplankton, obtained on a transect along the 0° meridian during the Winter Weddell Gyre Study, June 1992, revealed peculiarities of the early winter situation in the eastern Weddell Gyre. The vertical distribution and developmental stage composition of Rhincalanus gigas, Calanoides acutus, Calanus propinquus and krill, Euphausia superba larvae, were a good index for a general assessment of the seasonal condition of the plankton communities. There were 5 zones differing in seasonal situation: 1) The Polar Front and the southern ACC (not studied in detail), 2) The Weddell Front, 3) The Weddell Gyre interior, 4) The Maud Rise area and 5) The Coastal Current zone. In the Weddell Front, the planktonic community resembled an autumnal situation with moderate phytoplankton biomass; the overwintering stock of copepods was not completely formed and the occurrence of calyptopes larvae of E. superba indicated that krill continued to reproduce until May. In the Weddell Gyre interior, a typical winter plankton community was found even before sea ice had formed. The specific hydrographic regime of the Maud Rise (governed by the mesoscale circulation over the seamount) support the late autumn conditions similar to the Weddell Front (but without early krill larvae). The plankton of the Coastal Current was a winter community. We conclude that in the eastern part of the Weddell Front (compared to the western part) seasonal development of both phytoplankton and herbivorous zooplankton is delayed in spring but prolonged in late autumn. Furthermore it appears that the Weddell Sea ecosystem exhibits a much higher degree of spatial and temporal variability than thought before. This may have an impact on seasonal pattern of organic carbon transport from the pelagic realm to deeper water layers and to the sediment.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 10
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    Si vs. N vs. Fe in the Northern Hemisphere (1999)
    In:  EPIC3Gordon Reseach Conference on Polar Marine Science, Ventura, CA, USA.
    Details
    Publication Date: 2019-07-16
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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