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Sedimentological and geochemical responses of Lake Żabińskie (north-eastern Poland) to erosion changes during the last millennium
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2016 (English)In: Journal of Paleolimnology, ISSN 0921-2728, E-ISSN 1573-0417, Vol. 56, no 2-3, 239-252 p.Article in journal (Refereed) Published
Abstract [en]

Increased erosion triggered by land-use changes is a major process that influences lake sedimentation. We explored the record of erosion intensity in annually laminated sediments of Lake Żabińskie, northeast Poland. A 1000-year-long, annually resolved suite of sedimentological (varve thickness, sediment accumulation rate) and geochemical data (scanning XRF, loss on ignition, biogenic silica) was analyzed with multivariate statistics. PCA indicated erosion was a major process responsible for changes in the chemical composition of the sediments. Analysis of sedimentary facies enabled identification of major phases of erosion that influenced lake sedimentation. These phases are consistent with the history of land use, inferred from pollen analysis. From AD 1000 to 1610, conditions around and in Lake Żabińskie were relatively stable, with low erosion intensity in the catchment and a dominance of carbonate sedimentation. Between AD 1610 and 1740, higher lake productivity and increased delivery of minerogenic material were caused by development of settlements in the region and widespread deforestation. The most prominent changes were observed between AD 1740 and 1880, when further land clearance and increased agricultural activity caused intensified soil erosion and higher lake productivity. Landscape clearance also created better conditions for water column mixing, which led to changes in redox conditions in the hypolimnion. The most recent period (AD 1880–2010) was characterized by partial reforestation and a gradual decrease in the intensity of erosional processes.

Place, publisher, year, edition, pages
Springer, 2016. Vol. 56, no 2-3, 239-252 p.
Keyword [en]
Varves, Land-use change, Sediment accumulation rate, Microfacies, Multivariate statistics, Human impact
National Category
Environmental Sciences Geology Ecology Oceanography, Hydrology, Water Resources
URN: urn:nbn:se:umu:diva-126735DOI: 10.1007/s10933-016-9910-6ISI: 000383989300010OAI: diva2:1038854
Available from: 2016-10-20 Created: 2016-10-13 Last updated: 2016-10-20Bibliographically approved

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Meyer-Jacob, Carsten
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Department of Ecology and Environmental Sciences
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