Relative percentage diatom profile for BAIK38 (BAIK94-38A), using uncorrected taxa. The core has been dated using 210Pb analysis (to c. 1840 AD), and subsequent dates have been extrapolated—see text for details. Zones are defined using cluster analysis.


Fig. 3 is the diatom stratigraphy of dominant phytoplankton taxa for BAIK38 expressed as relative percentages, plotted against the age scale. Zone 1 (c. 880 AD–c. 1180 AD) is dominated throughout by the autumnal blooming species Cyclotella minuta, while Aulacoseira baicalensis and Synedra acus (both of which bloom in spring) are also present in lower but similar proportions (c. 15%). Zone 2 (c. 1180 AD–1840 AD) is characterised by an increase in C. minuta values in excess of 80% relative abundance, which are sustained virtually throughout the zone. During this time, other taxa are present at only very low abundances, while some (e.g., Stephanodiscus meyerii and S. acus) are frequently absent. Zone 3 (c. 1840 AD–1994 AD) is characterised firstly by a decline in relative abundance of C. minuta to its lowest levels in the profile, up until c. 1950 AD. This decline is accompanied by concomitant increases in A. baicalensis and, to a lesser extent, Aulacoseira skvortzowii and S. meyerii.

Related Identifier 10.1016/j.gloplacha.2004.09.021
Metadata Access
Creator Ryves, D.;Flower, Roger;Jewson, David;Mackay, Anson;Rioual, Patrick;Battarbee, Rick;Sturm, Michael
Publisher Deutsches GeoForschungsZentrum GFZ
Publication Year 2006
Contact Deutsches GeoForschungsZentrum GFZ
Language English
Resource Type Dataset;Dataset
Format text/tab-separated-values
Discipline Not stated
Temporal Point 2006-11-16T11:59:59Z