Reconstruction of landscape paleohydrology using the sediment archives of three dystrophic lakes in northeastern Poland

Abstract

Sediment layers of uniform age within lakes (isochrones) and their patterns reflect accumulation processes which can be correlated with hydrologic conditions in lake basins. The sedimentary archives in three small dystrophic lakes in northeastern Poland are described based on the correlation of local pollen assemblage zones in cores that were collected from the centers and margins of each lake. Past regional groundwater levels could be discerned from the shape of the isochrones, whether plane parallel or concave in configuration in relation to the lake basin shape. The concave configuration of the isochrones in the studied lakes shows that regional groundwater levels remained mostly high and stable throughout their history. The water levels in each lake during the Late Glacial and throughout the Holocene were different and no single, common water-level fluctuation pattern was identified in the three water bodies. The lack of such a finding suggests that the lakes are influenced dominantly by local hydrological factors.

The role of melting dead ice on landscape transformation in the early Holocene in Tuchola Pinewoods, North Poland

“…At that time, most lakes were created in the Central European Lowland (Wię ckowski, 1966;Nitz, 1984;Niewiarowski, 2003;Novik et al, 2010;Błaszkiewicz, 2011;Kaiser et al, 2012;Veski et al, 2012;van Asch et al, 2012;van Loon et al, 2012). However, both in Poland (Florek, 1991;_ Zurek et al, 2002;Błaszkiewicz, 2005Błaszkiewicz, , 2011Słowi nski, 2010;Starkel et al, 2012;Drzymulska et al, 2013;Michczynska et al, 2013) and in neighbouring countries e Germany (Kaiser, 2001;Homann et al, 2002;Gaudig et al, 2006;Kaiser et al, 2012), Belarus (Novik et al, 2010), Lithuania ( Seirien _ e et al, 2009) and Latvia (Terasmaa et al, 2013) e there are documented cases of survival of buried chunks of dead ice until the early Holocene. The major piece of evidence supporting this thesis, according to the cited authors, is the presence of a peaty layer at great depths under the lake sediments, even up to 30 m below the current water level (Wię ckowski, 1966;Nitz, 1984;Nowaczyk, 1994a;Błaszkiewicz, 2005Błaszkiewicz, , 2011Kaiser et al, 2012;Błaszkiewicz et al, in preparation).…”

Phases and interruptions in postglacial development of humic lake margin (Lake Suchar Wielki, NE Poland)

“…The radiocarbon age was calibrated with OxCal 4.2.3 (Bronk Ramsey 2013). The details concerning the age determination of the Lake Suchar Wielki sediments were presented by Drzymulska et al (2014).…”

“…In this research we comprise data derived from the sedimentary archive of Lake Suchar Wielki (Wigry National Park, northeastern Poland) ( Fig. 1), which was previously used for palaeohydrological recon� structions (Drzymulska et al, 2014). The other palae� oecological studies of humic lakes located in the terri� tory of Wigry National Park were conducted by Drzy� mulska et al (2013) and by .…”

Hydrogeochemical characteristics of interstitial water and overlying water in the lacustrine environment

“…For that type of lakes, very typical is sediment called 'dy', which is gelatinous and acidic sediment formed in anaerobic conditions by flocculation and precipitation from dissolved large and insoluble particles of humus materials. Its thickness reaches few meters or more (Huggett 2007;Drzymulska et al 2014). To assess determination of dystrophy level in 'suchar' polyhumic lakes in Wigry National Park, new limnological index-Hydrochemical Dystrophy Index, HDI-was used (Górniak 2004), which is calculated from pH, EC, DIC and DOC in surface water.…”