Diatom assemblage dynamics during abrupt climate change : the response of lacustrine diatoms to Dansgaard-Oeschger cycles during the last glacial period

Ampel, Linda; Wohlfarth, Barbara; Risberg, Jan; Veres, Daniel; Leng, Melanie J. ORCID: https://orcid.org/0000-0003-1115-5166; Kaislahti Tillman, Paivi. 2010 Diatom assemblage dynamics during abrupt climate change : the response of lacustrine diatoms to Dansgaard-Oeschger cycles during the last glacial period. Journal of Paleolimnology, 44 (2). 397-404. 10.1007/s10933-009-9350-7

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Abstract/Summary

The sedimentary record from the paleolake at Les Echets in eastern France allowed a reconstruction of the lacustrine response to several abrupt climate shifts during the last glacial period referred to as Dansgaard–Oeschger (DO) cycles. The high-resolution diatom stratigraphy has revealed distinct species turnover events and large fluctuations in stable oxygen isotope values in diatom frustules, as a response to DO climate variability. More or less identical species compositions became re-established during each DO stadial and interstadial phases, respectively. However, the relative abundance of the most dominant species within these assemblages varies and might indicate differences in climatic conditions. Interstadial phases are characterized by identical species successions. Transitions from stadial to interstadial conditions show a distinct Fragilaria–Cyclotella succession, which resembles the diatom regime shifts that have been recognized in some lakes in the Northern Hemisphere since the mid-nineteenth century.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1007/s10933-009-9350-7
Programmes:	BGS Programmes 2010 > NERC Isotope Geoscience Laboratory
ISSN:	0921-2728
NORA Subject Terms:	Earth Sciences
Date made live:	28 Jul 2010 09:31 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/7705

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