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Rapid ecosystem response to abrupt climate changes during the last glacial period in western Europe, 40-16 ka
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2008 (English)In: Geology, ISSN 0091-7613, E-ISSN 1943-2682, Vol. 36, no 5, 407-410 p.Article in journal (Refereed) Published
Abstract [en]

We present a high-resolution and independently dated multiproxy lake sediment record from the paleolake at Les Echets in southeastern France that displays synchronous changes in independent limnic and terrestrial ecosystem proxies, in concert with millennial-scale climate oscillations during the last glacial period. Distinct lake-level fluctuations, low lake organic productivity, and open, treeless vegetation indicate cold and dry conditions in response to Heinrich events. Alternating phases of higher and low lake organic productivity, stratified surface waters and long-lasting lake ice cover, decreased or increased catchment erosion, and tree-dominated or herb-dominated vegetation resemble Dansgaard-Oeschger interstadial-stadial variability. Transitions between different ecological states occurred in as little as 40-230 yr and seem to have been controlled by the position of the Polar Front. Ecosystem response after 30 ka suggests that local climate conditions became more important. Our results demonstrate that all parts of the terrestrial system responded to the abrupt and dramatic climatic changes associated with Dansgaard-Oeschger and Heinrich events, and that regional factors modulated ecosystem response.

Place, publisher, year, edition, pages
2008. Vol. 36, no 5, 407-410 p.
Keyword [en]
lake sediments, paleoenvironmental reconstruction, multiproxy records, Dansgaard-Oeschger cycles, Heinrich events
National Category
Earth and Related Environmental Sciences Subatomic Physics Engineering and Technology
Research subject
Ion Physics
URN: urn:nbn:se:uu:diva-110202DOI: 10.1130/G24600A.1ISI: 000255853300018OAI: oai:DiVA.org:uu-110202DiVA: diva2:275541
Available from: 2009-11-05 Created: 2009-11-05 Last updated: 2016-04-13Bibliographically approved

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Possnert, Göran
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Ion Physics
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