2025

Catena

Rocznik: 2025 | Tom: 255

artykuł naukowy

angielski

EN This study aims to compare two neighbouring Eemian palaeolakes in central Poland—Kozł´ ow (hydrologically open) and Struga (hydrologically closed)—to improve our understanding of palaeohydrological changes during the last interglacial period (MIS 5e). Using a multi-proxy approach, including pollen and plant macrofossil data, stable carbon and oxygen isotopes, and grain size distributions, we assess the impact of local hydrological conditions on sedimentation and climatic signals. Biogenic sequences record vegetation succession and climatic f luctuations throughout the Eemian, with Kozł´ow preserving a more continuous archive, whereas Struga exhibits hydrological instability affecting depositional patterns. Pollen data enabled the identification and detailed characterisation of regional pollen assemblage zones (RPAZ), facilitating correlations with regional frameworks across Western and Eastern Europe. Isotopic records at Kozł´ ow indicate evaporative enrichment linked to river inflow and intensified evaporation. In contrast, Struga functioned as a closed basin, with prolonged water residence time and isotope values reflecting internal hydrological balance. Grain size results highlight contrasting sedimentation regimes, with Kozł´ ow showing a transition towards coarser material, suggesting growing f luvial influence, while Struga reveals episodic hydrological fluctuations within a closed-lake system. Climate reconstructions using PPPbase indicate pronounced seasonality and shifts in precipitation patterns during the interglacial. Our findings underscore the contrasting hydrological regimes of Kozł´ ow and Struga, illustrating how local geomorphology and water balance shaped lake evolution. The palaeobotanical record further enhances understanding of catchment dynamics. By integrating isotopic and biological proxies, this study provides a refined reconstruction of Eemian climate evolution and a valuable framework for future interglacial research in Central Europe and beyond.

109039

10.1016/j.catena.2025.109039

https://www.sciencedirect.com/science/article/pii/S0341816225003418?via%3Dihub

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