Lake-swamp transition in the West-Siberian forest-steppe: pollen and plant microremains indicators of wetland ecosystem

Abstract

The paper presents a case study of a swamp, which succeeded a lake in the south of Western Siberia. Our investigated sediment core from the Oskino-09 peatbog site demonstrates local wetland development during the Middle-Late Holocene. A succession of the vegetal changes obtained by the plant microremains and palynological methods infers that the gradually shallowed lake entered a transitional phase of about 3.3. ka BP; both methods indicate a sharp decrease in macrophytic water plants. The lacustrine plants assemblage became completely replaced by the mire after 2.9 ka BP.