|
Barbara Wohlfarth, Stockholm University (Sweden)
Linda Ampel, Stockholm University (Sweden)
Maarten Blaauw, Queen's University (United Kingdom)
Daniel Veres, Stockholm University (Sweden)
|
|
Abrupt climate variability is a conspicuous feature seen in ice cores, marine sediments and speleothems, especially during marine isotope stage (MIS) 3. Corresponding changes have been observed in a number of terrestrial (lake sediment) archives, however clear evidence for a synchroneity of events and for the response of terrestrial ecosystems to these rapid changes remains ambiguous.
Here we report on a multi-proxy study of the lake sediment sequence of Les Echets in France. We show that the lake ecosystem underwent profound cyclic changes alternating between time intervals of higher and lower lake organic productivity, which both resemble and differ from those seen in ice core and marine archives. Our results indicate that although ecosystem response to climate variability was rapid, it was modulated by local factors.
|
