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  • 210Pb sediment dating  (1)
  • Galloway lakes  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    The design and performance of a new box corer for collecting undisturbed samples of soft subaquatic sediments (1995)
    Springer
    Journal of paleolimnology 14 (1995), S. 101-111 
    Details
    ISSN: 1573-0417
    Keywords: box corer ; Lake Baikal ; 210Pb sediment dating
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract The ‘Baikal’ sediment box corer represents an innovation in design of the closing mechanism and involves a single, thin, and flexible stainless steel blade rather than closing jaws. With this light-weight box corer only a relatively small cross-sectional area is offered to the sediment, allowing easier penetration. The closure blade is propelled smoothly across the base of the box in a downwardly convex path by a set of constant force springs. Depending on choice of blade-release mechanisms, the corer can either be triggered immediately as the support cable slackens, after a delay of a few seconds, or immediately upon retrieval. The box corer has been used successfully to sample poorly consolidated sediments in freshwater lakes over a depth range of 8 to 1624 m. Cores of deep-water surficial sediment from Lake Baikal were tested for representativity and replicability by profiling natural and artificial radioisotopes and lithostratigraphic features.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00735476
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  • 2
    Electronic Resource
    Electronic Resource
    The relationship between surface sediment diatom assemblages and pH in 33 Galloway lakes: Some regression models for reconstructing pH and their application to sediment cores (1986)
    Springer
    Hydrobiologia 143 (1986), S. 93-103 
    Details
    ISSN: 1573-5117
    Keywords: Galloway lakes ; pH reconstructions ; diatoms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The species composition of surface sediment diatom assemblages in 33 Galloway lakes, pH range c. 4.5 to 7.4, is related in a statistically significant manner to water acidity (or to factors closely associated with pH). Predictive models of summer mean pH, using simple regression equations of Index B (Renberg & Hellberg, 1982) with both Scandinavian and Galloway data sets, and multiple regression equations using diatom pH preference groups and individual species, are described and applied to fossil diatoms in six sediment cores. Although multiple regression of individual species gives the highest correlation coefficient (r2=0.87) in the modern data set this method is least appropriate for reconstructing pH values from fossil material where predictor species are often absent. Of the four methods examined here it is suggested that multiple regression of diatom preference groups is probably the most suitable for pH reconstructions from sediment cores.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00026650
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    Paper (German National Licenses)
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