A 200, 000-year, high-resolution record of diatom productivity and community makeup from Lake Baikal shows high correspondence to the marine oxygen-isotope record of climate change

摘要

Siliceous microfossil succession was analyzed in a 200, 000-yr sediment sequence recovered from the Buguldeika Saddle in Lake Baikal, Russia. Siliceous microfossil abundance varied among core depths from no preserved Microfossils during inferred colder climate conditions to recent interglacial sediments containing over 300×10~6 Microfossils per g dry sediment. Depth-age microfossil assemblage zones (CA-I to CA-IV) identified using corre- Spondence analysis had high corespondence to stages in the marine δ~18O isotope record and could be partially Aligned with Late Pleistocene glacial-interglacial cycling models from the mid-Siberian Highland.