The environmental history of the oxbow in the Luciąża River valley – Study on the specific microclimate during Allerød and Younger Dryas in central Poland

Changes in habitat conditions in a Late Glacial fluviogenic lake in response to climatic fluctuations (Warta River valley, central Poland)

“…How ever, other re con struc tions from the £ódŸ re gion con tra dict this trend, sug gest ing lo cally warmer cli ma tic con di tions. The CH-I re con struc tion from Rozprza (Antczak-Orlewska et al, 2023) and CL-I re con struc tions from OEwierczyna and Paw³owa (Paw³owski et al, 2015(Paw³owski et al, , 2016b show a bit warmer first stage of the Youn ger Dryas, which is more con sis tent with the CL-I than CH-I re con struc tion from £ugi.…”

“…What fol lows is that de pos its from this core in ter val re cord a to tal terrestrialisation of the palaeolake sur face. The stud ied core dis plays a many-fold in crease in lithophile el e ment con cen trations (Na, K and Mg), up to lev els typ i cal of sed i ments laid down in lac us trine and telmatic en vi ron ments, con sis tent with nu merous sites lo cated in cen tral Po land (Forysiak, 2012;Paw³owski et al, 2015;Petera-Zganiacz et al, 2022;Antczak-Orlewska et al, 2023). This is as so ci ated with a de te ri o ra tion of cli ma tic condi tions dur ing the Youn ger Dryas, and a re sul tant with drawal of for est as sem blages, which led to in ten si fied ero sion within the catch ment.…”

“…In cen tral Po land, fen peatlands be gan to ap pear mostly in the BÝlling or in AllerÝd, tes ti fy ing to the stabili sa tion of val ley bot toms and the main te nance of a rel a tively con stant base-level po si tion, as man i fested in the ac tiv ity of the me an der ing chan nel sys tem. Sev eral peatlands and palaeolakes that func tioned in ac tive river val leys have been al ready stud ied in the re gion: the Ner (Forysiak et al, 2010;Forysiak, 2012), OEwiêtojanka (Balwierz and GoŸdzik, 1997), Widawka (Paw³owski, 2012), Wkra (Niska et al, 2017), Grabia (Paw³owski et al, 2014), Luci¹¿a (P³óciennik et al, 2021;Antczak-Orlewska et al, 2023) and Warta (Forysiak, 2012). How ever, biogenic sed i ments de pos ited in an area of ac tive flu vial pro cesses are of ten ex posed to the in flu ence of river or flood wa ters, which may sig nif i cantly dis turb the orig i nal sed imen tary pat tern, and con trib ute to the ac cu mu la tion of allochthonous ma te rial (¯urek, 1993;Rydelek, 2005;Paw³owski et al, 2015;Forysiak et al, 2021).…”

The spatial and temporal reconstruction of a medieval moat ecosystem

“…Both features evidenced relatively fast peat sedentation and paludification in comparison with natural water bodies (cf. 17 ). The moat system in the Tum (Łęczyca) stronghold has been well studied, including palynological and plant macrofossil analyses from its different parts 45 , 46 .…”

“…The results indicated that when the stronghold was inhabited (14th-15th century AD), the moat was infilled with shallow water with possible episodes of rinsing through an artificial channel from the nearby river. Changes in water trophic state were tracked using chironomid-based models, and the Chironomidae-inferred summer temperatures of the Late Vistulian came from the nearby palaeomeander 17 . The Holocene chironomid sequence in the palaeomeander core was too low in abundance for quantitative reconstructions.…”