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  • 1995-1999  (5)
  • 1
    Keywords: Habilitationsschrift ; Kohlenstoff ; Kontinentalhänge ; Hochschulschrift
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource ( 198Seiten = 23MB) , Ill., graph. Darst., Kt
    Language: German
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  • 2
    Keywords: Habilitationsschrift ; Kohlenstoff ; Kontinentalhänge ; Hochschulschrift
    Type of Medium: Book
    Pages: 198 S , Ill., graph. Darst., Kt
    Language: German
    Note: Kiel, Univ., Habil.-Schr., 1998
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  • 3
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract During two cruises to the Baltic (Mecklenburg Bight) in September 1993 and November 1994 bottom water and sediment samples were taken from 5 stations on a 2.0 km long transect above a benthic sandy silt community. Profiles of total particulate matter, particulate organic carbon, chlorophyll equivalents and urea were taken in the benthic boundary layer (5–40 cm height above sea floor) on the downstream stations across an area occupied by macrofauna feeding at the sediment-water interface at 26 m water depth. Particulate matter concentration profiles varied under the two different flow conditions in September ( u* = 0.7 cm s-1) and November (u* = 0.2 cm s-1). In September 1993 resuspension of total particulate matter (TPM) of 22 to 130 mg m-2 h-1 occurred while particulate organic carbon (POC) and chlorophyll (CPE) were deposited with a rate of 9 mg m-2 h-1 and 0.11 mg m-2 h-1 respectively at the station of highest macrofauna abundance. In November 1994 physical sedimentation and biological deposition of up to 388 mg m-2 h-1 TPM, 7.4 mg m-2 h-1 POC and 0.07 mg m-2 h-1 CPE occurred. Urea was released into the water column. Data suggest that in shallow water environments local sediment and benthic boundary layer characteristics prevent large scale calculations of fluxes of particulate matter.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Hydrobiologia 375-376 (1998), S. 265-285 
    ISSN: 1573-5117
    Keywords: Macrobenthos ; community structure ; continental slope ; flow velocity ; C/N ; NE Atlantic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Macrofauna density, biomass and community structure together with several characteristics of the sediment and flow velocity were estimated in May 1994 and August 1995 at seven stations ranging from 208 m to 4470 m water depth along the OMEX-transect in the Goban Spur area (NE Atlantic). In 1994 four additional stations were sampled at a parallel transect about 40 km SSE of the OMEX-transect. In 1995 two additional transects were sampled, one in the Porcupine Seabight ∼ 100 km NNW and one along the slope at ∼ 3500 m water depth situated ∼ 200 km SSE of the OMEX-transect. An overall trend in decrease in density and biomass with increasing water depth was found, but no depth related pattern in mean individual weight could be observed. Mean individual weight, however, did show a negative relationship with flow velocities. Correspondence-analyses and single linkage clustering of the community structure showed three more or less depth related clusters, representing a shelf community, an upper-slope and a lower-slope community. These clusters coincided with differences in grain-size, % organic C and total N within the sediment and differences in flow velocities. However, some of the stations at similar depths were not clustered together. Grain-size did not differ at stations with similar depth, but the % of C and N and flow velocities could differ markedly. Stations at similar depth, but with different physical and/or chemical conditions showed differences in density, biomass, mean individual weight and in macrobenthic community structure. More filter-feeding taxa were observed at stations with higher flow velocities, whereas more subsurface deposit-feeders were found at stations with higher sedimentation rates. Thus, besides the effects of water depth on macrobenthic community structure, other physical and chemical factors (such as flow velocities and organic matter supply) can be important structuring factors as well.
    Type of Medium: Electronic Resource
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  • 5
    Publication Date: 2023-07-12
    Type: Thesis , NonPeerReviewed
    Format: text
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