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Sedimentary geochemical record of humanï¿œinduced environmental changes in the Lake Brunnsviken watershed, Sweden
Department of Geology and Geochemistry, Stockholm University, S 10691 Stockholm, Sweden.
Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1063, USA.
Department of Geology and Geochemistry, Stockholm University, S 10691 Stockholm, Sweden.
Department of Geology, Wayne State University, Detroit, Michigan 48202, USA.
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2004 (English)In: Limnology and Oceanography, ISSN 0024-3590, E-ISSN 1939-5590, Limnology and Oceanography, Vol. 49, no 5, p. 1560-1569Article in journal (Refereed) Published
Abstract [en]

Environmental changes in Lake Brunnsviken, its watershed, and the greater Stockholm region since the middle of the nineteenth century have left interpretable geochemical imprints in the bottom sediments. These human-induced perturbations within the lakeï¿œs watershed included agriculture, urbanization, sewage and industrial disposal, and water column aeration. Smaller d15Ntotal values, high organic carbon mass accumulation rates, low C:N ratios, and larger d13Corg values identify periods of increased nutrient delivery and elevated primary productivity in the lake. C: S ratios that change from high to low trace the transition from an oxic hypolimnion to an anoxic one during the periods of high productivity. Accumulations of redox-sensitive trace elements increase during the anoxic period and are further magnified during a time of industrial waste discharge into the lake. A recent decrease in black carbon concentrations in sediments reflects the conversion from wood and coal to cleaner forms of energy.

Place, publisher, year, edition, pages
John Wiley & Sons, 2004. Vol. 49, no 5, p. 1560-1569
National Category
Environmental Sciences Geosciences, Multidisciplinary Geology Geochemistry
Identifiers
URN: urn:nbn:se:liu:diva-151917DOI: 10.4319/lo.2004.49.5.1560OAI: oai:DiVA.org:liu-151917DiVA, id: diva2:1254707
Available from: 2018-10-10 Created: 2018-10-10 Last updated: 2018-10-10Bibliographically approved

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Routh, Joyanto

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  • de-DE
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  • nn-NB
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