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  • sediments
  • Springer  (7)
  • American Chemical Society
  • Annual Reviews
  • Blackwell Publishing Ltd
  • 2005-2009
  • 1990-1994
  • 1980-1984  (7)
  • 1983  (7)
Collection
Keywords
Publisher
  • Springer  (7)
  • American Chemical Society
  • Annual Reviews
  • Blackwell Publishing Ltd
Years
  • 2005-2009
  • 1990-1994
  • 1980-1984  (7)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Cladoceran remains as evidence of change in trophic state in three Swiss lakes (1983)
    Springer
    Hydrobiologia 103 (1983), S. 141-146 
    Details
    ISSN: 1573-5117
    Keywords: paleolimnology ; lakes ; sediments ; eutrophication ; Cladocera ; Switzerland
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Species composition and density of cladoceran populations changed in Lakes Zürich, St. Mortiz and Baldegg as human populations increased in these watersheds. Lake Zürich sediments became annually laminated in the 1890's as a result of increased organic input as the size of the cities surrounding the lake grew. At the same time, the Bosmina species changed from a oligotrophic form (longispina) to a eutrophic form (longirostris). An increase in Daphnia spp. populations also occurred at this time in the lake's history. Bosmina longispina reappeared in the lake in 1965 as the lake's trophic status changed from eutrophic to mesotrophic due to effective sewage treatment facilities. Annual laminations appear in the Lake St. Moritz sediments about 1910. Shortly thereafter, a shift from B. longispina to B. longirostris occurred. This change in trophic status is associated with increased tourism in the area. Lake Baldegg sediments also show annual laminations beginning in 1885 and a similar shift in the Bosmina species. Other cladoceran remains were too scarce to be useful in interpreting the histories of these lakes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028442
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  • 2
    Electronic Resource
    Electronic Resource
    Recent climatic changes recorded by the salinity of pore waters in the Dead Sea sediments (1983)
    Springer
    Hydrobiologia 103 (1983), S. 75-79 
    Details
    ISSN: 1573-5117
    Keywords: paleolimnology ; Dead Sea climate ; pore-waters ; diffusion ; sediments ; salinity ; porosity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The salinity of lakes is subject to variations imposed by climatic changes. These variations are recorded in the salinity profile of pore waters. Meromictic lakes, such as the Dead Sea, are a special case where waters which underlie the mixolimnion reflect salinity variations. In a sediment core from Dead Sea shallow waters, the salinity profile exhibited a minimum at about 1.9 m depth. It is shown by a diffusion model that this minimum can be attributed to lower salinities which prevailed at the sediment water interface for several decades around the turn of this century. No such minimum was observed in a sediment core from the deepest part of the lake where, during the last two centuries, the overlying brines had a constant salinity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028431
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  • 3
    Electronic Resource
    Electronic Resource
    A new, flow-through corer for the quantitative sampling of surface sediments (1983)
    Springer
    Hydrobiologia 99 (1983), S. 75-79 
    Details
    ISSN: 1573-5117
    Keywords: macrofauna ; meiofauna ; sediments ; methods ; coring
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A new, flow-through benthic corer is described and compared to other commonly used coring methods. The new corer compares favorably with diver coring and is superior to coring with a ball-type, check valve corer, based on recovery of meiofauna, macrofauna, and particle bound hydrocarbons. Check valve corers yielded the most variable results. The new corer may be used to efficiently obtain samples of surface sediments from shallow (〈6 m) water, where a reasonably stable working platform is available.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00013719
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  • 4
    Electronic Resource
    Electronic Resource
    Microbiological examination of Lake Erie and Lake Ontario sediments (1983)
    Springer
    Hydrobiologia 98 (1983), S. 135-145 
    Details
    ISSN: 1573-5117
    Keywords: sediments ; Canadian Great Lakes ; bacteria ; distribution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Diver collected cores from three sites in Lake Erie, west of Cleveland, Eastern basin and near Buffalo, and one from Lake Ontario near the mouth of the Niagara River, were sectioned to 20 cm and examined for sulfur cycle and nitrogen cycle bacteria, heterotrophic bacteria, insoluble organic and inorganic phosphate solubilizing bacteria and manganese oxidizing bacteria. Eh, pH, nitrogen, organic carbon and percentage moisture determinations were also made. Data from this study support and confirm other microbiological data collected from Lower Great Lakes sediment and also support the hypothesis that microbial flora of similar type sediments are numerically similar irrespective of the sediments source within the Lower Great Lakes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02185631
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  • 5
    Electronic Resource
    Electronic Resource
    The relationship between fossil diatom assemblages and limnological conditions (1983)
    Springer
    Hydrobiologia 98 (1983), S. 223-235 
    Details
    ISSN: 1573-5117
    Keywords: diatoms ; paleolimnology ; lakes ; Minnesota ; sediments ; microfossils
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Fossil diatom assemblages from the sediment/water interface in 105 Minnesota lakes were compared with measurements of alkalinity, sulphate, total phosphorus, transparency, and water depth at the sample site. Similar assemblages were placed together using cluster analysis and comparisons of environmental variables between diatom clusters were made using an analysis of variance. Total alkalinity and transparency showed the greatest difference among clusters. Samples from shallow eutrophic prairie lakes were dominated by Melosira granulata, Stephanodiscus niagarae and, occasionally, by Stephanodiscus hantzschii. Deep oligotrophic lakes had modest percentages of Cyclotella comta. Dilute acid lakes were dominated either by Melosira distans and M. italica or by Tabellaria fenestrata, Cyclotella stelligera, and in some cases C. glomerata. Assemblages with Cyclotella glomerata and Synedra nana were found in naturally meromictic lakes. Stephanodiscus hantzschii showed a preference for extremely eutrophic lakes. The relationships between recently deposited diatom assemblages and the lake environmental conditions studied here can be used to evaluate the extent of past environmental change in lakes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021023
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  • 6
    Electronic Resource
    Electronic Resource
    Gas chromatographic determination of total amino acids and protein in sediments using the ninhydrin-CO2 reaction (1983)
    Springer
    Hydrobiologia 101 (1983), S. 189-194 
    Details
    ISSN: 1573-5117
    Keywords: amino acids ; protein ; sediments ; ninhydrin reaction ; gas chromatography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A sensitive modification of the ninhydrin-CO2 method involving the gas chromatographic determination of the total protein and amino acid content of sediment is described. The method gives a linear response over the amino acid concentration range 10−5 M to 4 × 10−2 M. It can be used for whole sediment, hydrolysates and interstitial water. The performance of the method is compared with the fluorescamine method for primary amines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00009874
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  • 7
    Electronic Resource
    Electronic Resource
    Variability of Actinocyclus kuetzingii (A.S.) Sim. in the Littorina sediments of the Polish Baltic Coast (1983)
    Springer
    Hydrobiologia 103 (1983), S. 251-256 
    Details
    ISSN: 1573-5117
    Keywords: paleolimnology ; diatom flora ; sediments ; Vistula Lagoon ; Poland
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The variability of Actinocyclus kuetzingii (A.S.) Sim. in the Littorina deposits of the Vistula Lagoon and Lake Druzno were studied. During the time of the Littorina Lake Druzno was a part of the Vistula Lagoon. In the different parts of the Lagoon both the abundance of A. kuetzingii and the diameter of its valves change in a manner associated with phases of the Littorina transgression. Coscinodiscus (Actinocyclus) kuetzingii fo. subsalsa Brockmann is probably an ecotype of A. kuetzingii (A.S.) Sim.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028461
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