Vegetation and climate history of the Yana River lowland, Russia, during the last 6400 yr

New pollen records and radiocarbon dates from two sites in the Yana River l owlands, Arctic Yakutia, Russia provide reconstructions of vegetation and c limate history of this region during the last 6400 yr. The fluctuations in pollen and spores reflect the local hydrological events and regional climat e changes. The data show that larch (Larix dahurica) forests with shrub ald er (Alnus fruticosa) and dwarf birch (Betula exilis) dominated the area dur ing the last 6400 yr BP. There is no evidence for tree-line fluctuations at the sites during the latter half of the Holocene. Climate reconstructions made by transfer function from one site show that the warmest lime was betw een 6000 and 4500 yr BP. All climate fluctuations reconstructed at this sit e correspond well with regional climate changes. (C) 2000 Elsevier Science Ltd. All rights reserved.