Author:
Belyanin P S,Belyanina N I
Abstract
Abstract
Reconstructions of the vegetation in the eastern part of the Khanka Plain have been performed for the time interval at the transition from the Late Pleistocene cryochron (MIS 2) to the Holocene. New evidence of considerable changes in the vegetation structure were provided by the palynological studies supplemented with radiocarbon dates on wood fragments and plant detritus recovered from alluvial, lacustrine and mires sediments. It has been found that at the glacial stage MIS 2 the Khanka Plain was dominated by open birch forests with larch and spruce, alternating with Sphagnum mires with shrub birch. Later, at the interstadial, formations typical of southern boreal dark coniferous (needle-leaved) taiga became widely spread. The Early Holocene was marked by wide expansion of broadleaf trees (and first of all, elm and Mongolian oak) in the Khanka Plain ecosystems. Mixed forests with Korean pine became widely spread in the mountains surrounding the lowland. Mires, patches of dark coniferous forests, and open forests of larch persisted on the plains adjoining the lake and on swampy valley floors.
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