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Climate-related changes during the Late Glacial and early Holocene in northern Poland, as derived from the sediments of Lake Sierzywk

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Abstract

Reconstruction of past climate change and ecosystem response is important to correctly assess the impacts of global warming. In this study, we provide a paleoenvironmental record of in-lake and catchment changes in northern Poland during the Late Glacial and early Holocene using various biotic proxies (pollen, macrofossils and Cladocera) preserved in the lake sedimentary record. Chronology was derived from palynological correlation with a well-dated pollen sequence from nearby-lying Lake Ostrowite and some well-dated events of vegetation history in Central Europe. Pollen analysis provided information on regional climate change affecting vegetation dynamics, whereas macrofossils supplied substantial information on the response of local flora and fauna to climatic, geomorphological and limnological changes. Data were supplemented by analysis of Cladocera remains, which are of special importance because of their quick response to changes in trophic conditions and climate (especially temperature). The bottom of the sediment core reflects an initial stage of the lake formed during the late Alleröd. The Younger Dryas cooling apparently resulted in forest recession and presence of cold tolerant Cladocera species. Due to amelioration of climate at the end of the Younger Dryas and melting of ice, the lake deepened. The beginning of the Holocene was characterised by forest shrinkage and induced clear changes in local flora and fauna communities. The regional vegetation development deduced from the lake’s core is generally consistent with the vegetation history of central Europe. Due to the location of the site near the seashore (oceanic climate and western wind), signals of warming came earlier than inland and in eastern Poland.

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References

  • Ammann, B., H. J. B. Birks, S. J. Brooks, U. Eicher, U. von Grafenstein, W. Hofmann, G. Lemdahl, J. Schwander, K. Tobolski & L. Wick, 2000. Quantification of biotic responses to rapid climatic changes around the Younger Dryas – a synthesis. Palaeogeography, Palaeoclimatology, Palaeoecology 159: 313–347.

    Article  Google Scholar 

  • Bałaga, K., T. Goslar & T. Kuc, 1998. A comparative study on the Late Glacial/Early Holocene climatic changes recorded in laminated sediments of Lake Perespilno – introductory data. In Ralska-Jasiewiczowa, M., T. Goslar, T. Madeyska & L. Starkel (eds), Lake Gościąż, Central Poland. A Monographic Study. Szafer Institute of Botany, Polish Academy of Sciences, Kraków: 175–180.

    Google Scholar 

  • Berglund, B. E., 1966. Late-Quaternary vegetation in eastern Blekinge, south-eastern Sweden. A pollen analytical study. Part II Post-glacial time. Opera Botanica 12: 1–180.

    Google Scholar 

  • Berglund, B. E. (ed.), 1986. Handbook of Holocene Palaeoecology and Palaeohydrology. Wiley, Chichester, UK.

    Google Scholar 

  • Berglund, B. E. & M. Ralska-Jasiewiczowa, 1986. Pollen analysis. In Berglund, B. E. (ed.), Handbook of Holocene Palaeoecology and Palaeohydrology. Wiley, Chichester, UK: 455–483.

    Google Scholar 

  • Birks, H. H., 2000. Aquatic macrophyte vegetation development in Krakenes Lake, western Norway, during the Late-Glacial and early-Holocene. Journal of Paleolimnology 23: 7–19.

    Article  Google Scholar 

  • Birks, H. J. B. & H. H. Birks, 1980. Quaternary Palaeoecology. Edward Arnold Publishers, London.

    Google Scholar 

  • Blundell, A., D. Charman & K. Barber, 2008. Multiproxy late Holocene peat records from Ireland: towards a regional palaeoclimate curve. Journal of Quaternary Science 23: 59–71.

    Article  Google Scholar 

  • Choiński, A., 2006. Katalog jezior polskich. Wydawnictwo Naukowe UAM, Poznań.

    Google Scholar 

  • De la Mare, W. K., 1997. Abrupt mid-twentieth-century decline in Antarctic sea ice extent from whaling records. Nature 389: 57–60.

    Article  Google Scholar 

  • De Vleeschouwer, F., A. Cheburkin, G. Le Roux, N. Piotrowska, J. Sikorski, M. Lamentowicz, N. Fagel & M. Mauquoy, 2009. Multiproxy evidences of Little Ice Age palaeoenvironmental changes in a peat bog from northern Poland. Holocene 19(4): 625–637.

    Article  Google Scholar 

  • Finsinger, W. & W. Tinner, 2007. Pollen and plant macrofossils at Lac de fully (2135 m a.s.l.): Holocene forest dynamics on a highland plateau in the Valais, Switzerland. Holocene 17: 1119–1127.

    Article  Google Scholar 

  • Flössner, D., 1972. Branchiopoda, Branchiura. Die Tierwelt Deutschlands 60: 1–501.

    Google Scholar 

  • Flössner, D., 2000. Die Haplopoda und Cladocera (ohne Bosminidae) Mitteleuropas. Backhuys Publisher, Leiden, The Netherlands.

    Google Scholar 

  • Frey, D. G., 1986. Cladocera analysis. In Berglund, B. E. (ed.), Handbook of Holocene Palaeoecology and Palaeohydrology. Wiley, Chichester, UK: 667–692.

    Google Scholar 

  • Frey, D. G., 1991. First subfossil records of Daphnia headshields and shells (Anomopoda, Daphniidae) about 10000 years old from northernmost Greenland, plus Alona guttata (Chydoridae). Journal of Paleolimnology 6: 193–197.

    Article  Google Scholar 

  • Grimm, E. C., 1992. Tilia and Tilia-Graph. Pollen spreadsheet and graphics programs. In 8th International Palynological Congress, Aix-en-Provence, 6–12 September 1992. Program and Abstracts: 56.

  • Hald, M. & S. Korsen, 2008. The 8200 cal. yr BP event reflected in the Arctic fjord, Van Mijenfjorden, Svalbard. The Holocene 18: 981–990.

    Article  Google Scholar 

  • Hjelmroos-Ericsson, M., 1981. Holocene Development of Lake Wielkie Gacno Area, Northwestern Poland. Thesis 10, University of Lund, Sweden: 1–101.

  • Hofmann, W., 2000. Response of the chydorid faunas to rapid climatic changes in four alpine lakes at different altitudes. Palaeogeography, Palaeoclimatology, Palaeoecology 159: 281–292.

    Article  Google Scholar 

  • Hultén, E. & M. Fries, 1986. Atlas of North European Vascular Plants: North of the Tropic of Cancer I–III. Koeltz Scientific Books, Königstein.

    Google Scholar 

  • Iversen, J., 1964. Plan indicators of Climate, Soil, and Other Factors During the Quaternary. Reports VI International Congress of Quaternary, Warsaw 1961, Sect. 2: 421–228.

  • Johnsen, S. J., H. B. Clausen, W. Dansgaard, K. Fuhrer, N. Gundestrup, C. U. Hammer, P. Iversen, J. Jouzel, B. Stauffer & J. P. Steffensen, 1992. Irregular glacial interstadials recorded in a new Greenland ice core. Nature 359: 311–313.

    Article  Google Scholar 

  • Jones, S. T., J. D. Marshall, S. F. Crowley, A. Bedford, N. Richardson, J. Bloemendal & F. Oldfield, 2002. A high resolution, multiproxy Late-glacial record of climate change and intrasystem responses in Northwest England. Journal of Quaternary Science 17: 329–340.

    Article  Google Scholar 

  • Komarek, J. & V. Jankovska, 2001. Review of the green algal genus Pediastrum: implication for pollen-analytical research. Bibliotheca Phycologica 108: 1–127.

    Google Scholar 

  • Korhola, A. & M. Rautio, 2001. Cladocera and other branchiopod crustaceans. In Smol, J. P., H. J. B. Birks & W. M. Last (eds), Tracking Environmental Change Using Lake Sediments, Zoological Indicators, Vol. 4. Kluwer, Dordrecht: 5–41.

    Chapter  Google Scholar 

  • Kowalewski, G., S. Żurek, T. Schubert & G. Karcz, 2009. Initial development of floating mat in Małe Łowne Lake (N Poland). Limnological Review 9: 175–187.

    Google Scholar 

  • Kuc, T., K. Różański & M. Duliński, 1998. Isotopic indicators of the Late-Glacial/Holocene transition recorded in the sediments of Lake Gościąż. In Ralska-Jasiewiczowa, M., T. Goslar, T. Madeyska & L. Starkel (eds), Lake Gościąż, Central Poland, Vol. I. W. Szafer Institute of Botany, Kraków: 158–162.

    Google Scholar 

  • Lamentowicz, M. & M. Obremska, 2010. A rapid response of testate amoebae and vegetation to inundation of a kettle hole mire. Journal of Paleolimnology 3: 499–511.

    Article  Google Scholar 

  • Lamentowicz, M., K. Milecka, M. Gałka, A. Cedro, J. Pawlyta, N. Piotrowska, Ł. Lamentowicz & W. van der Knaap, 2009a. Climate- and human-induced hydrological change since AD 800 in an ombrotrophic mire in Pomerania (N Poland) tracked by tetate amoebae, macro-fossils, pollen, and tree-rings of pine. Boreas 38: 214–229.

    Article  Google Scholar 

  • Lamentowicz, M., Z. Balwierz, J. Forysiak, M. Kloss, M. Płóciennik, P. Kittel, J. Twardy, S. Żurek & J. Pawlyta, 2009b. Multiproxy study of anthropogenic and climatic changes in the last two millenia from a small mire in central Poland. Hydrobiologia 631: 213–230.

    Article  Google Scholar 

  • Lang, G., 1994. Quartäre Vegetationsgeschichte Europas. Gustav Fischer Verlag, Jena, Stuttgart, New York.

    Google Scholar 

  • Latałowa, M., 1999. Late Vistulian vegetation on Wolin Island (NW Poland)—the preliminary results. Quaternary Studies in Poland, Special Issue: 147–156.

  • Latałowa, M., 2004. Late Glacial. In Ralska-Jasiewiczowa, M., M. Latałowa, K. Wasylikowa, K. Tobolski, E. Madeyska, H. E. Wright Jr. & C. Turner (eds), Late Glacial and Holocene history of vegetation in Poland based on isopollen maps. W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków: 385–391.

    Google Scholar 

  • Latałowa, M., M. Kupryjanowicz & D. Nalepka, 2004a. Chenopodiaceae–Goosefoot family. In Ralska-Jasiewiczowa, M., M. Latałowa, K. Wasylikowa, K. Tobolski, E. Madeyska, H. E. Wright Jr. & C. Turner (eds), Late Glacial and Holocene History of Vegetation in Poland Based on Isopollen Maps. W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków: 273–281.

    Google Scholar 

  • Latałowa, M., K. Tobolski & D. Nalepka, 2004b. Pinus L., subgenus Pinus (subgen. Diploxylon (Koehne) Pilger)–Pine. In Ralska-Jasiewiczowa, M., M. Latałowa, K. Wasylikowa, K. Tobolski, E. Madeyska, H. E. Wright Jr. & C. Turner (eds), Late Glacial and Holocene History of Vegetation in Poland Based on Isopollen Maps. W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków: 165–177.

    Google Scholar 

  • Lauterbach, S., A. Brauer, N. Andersen, D. Danielopol, P. Dulski, M. Hüls, K. Milecka, T. Namiotko, B. Plessen, K. Zamelczyk & U. Von Grafenstein, 2011. Multiproxy evidence for Late glacial to mid-Holocene environmental and climatic changes in northeastern Poland. Boreas 40: 57–72.

    Article  Google Scholar 

  • Legendre, P. & P. Legendre, 1998. Numerical Ecology, 2nd English edn. Elsevier Science B.V., Amsterdam.

    Google Scholar 

  • Litt, T. & M. Stebich, 1999. Bio- and chronostratigraphy of the lateglacial in the Eifel region, Germany. Quaternary International 61: 5–16.

    Article  Google Scholar 

  • Litt, T. & K. Tobolski, 1991. Materiały do postglacjalnej historii roślinności okolic Lednogóry. Część I. Badania palinologiczne osadów J. Lednica—rdzeń V/86. In Tobolski, K. (ed.) Wstęp do paleoekologii Lednickiego Parku Krajobrazowego: 57–61.

  • Litt, T., A. Brauer, T. Goslar, J. Merkt, K. Bałaga, H. Müller, M. Ralska-Jasiewiczowa, M. Stebich & J. F. W. Negendank, 2001. Correlation and synchronisation of Lateglacial continental sequences in northern Central Europe based on annually laminated lacustrine sediments. Quaternary Science Reviews 20: 1233–1249.

    Article  Google Scholar 

  • Lotter, A. F., 1991. How long was the Younger Dryas? Preliminary evidence from annually laminated sediments of Soppensee (Switzerland). Hydrobiologia 214: 53–57.

    Article  Google Scholar 

  • Makohonienko, M., M. Latałowa, K. Milecka, I. Okuniewska-Nowaczyk & D. Nalepka, 2004. Artemisia L. In Ralska-Jasiewiczowa, M., M. Latałowa, K. Wasylikowa, K. Tobolski, E. Madeyska, H. E. Wright Jr. & C. Turner (eds), Late Glacial and Holocene History of Vegetation in Poland Based on Isopollen Maps. W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków: 253–261.

    Google Scholar 

  • Milecka, K., 2005. Historia jezior lobeliowych zachodniej części Borów Tucholskich na tle postglacjalnego rozwoju szaty leśnej. Wydawnictwo Naukowe UAM, Poznań.

    Google Scholar 

  • Milecka, K. & K. Szeroczyńska, 2005. Changes in macrophytic flora and planktonic organisms in lake Ostrowite, Poland, as a response of climatic and trophy fluctuations. The Holocene 15: 74–84.

    Article  Google Scholar 

  • Miotk-Szpiganowicz, G., 1992. The history of the vegetation of Bory Tucholskie and the role of man in the light of palynological investigation. Acta Palaeobotanica 32: 39–122.

    Google Scholar 

  • Noryśkiewicz, B., A. Filbrandt-Czaja, A. M. Noryśkiewicz & D. Nalepka, 2004. Helianthemum Mill. – rock-rose. In Ralska-Jasiewiczowa, M., M. Latałowa, K. Wasylikowa, K. Tobolski, E. Madeyska, H. E. Wright Jr. & C. Turner (eds), Late Glacial and Holocene History of Vegetation in Poland Based on Isopollen Maps. W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków: 305–308.

    Google Scholar 

  • Økland, K. A. & J. Økland, 2001. Freshwater bryozoans (Bryozoa) of Norway II: distribution and ecology of two species of Fredericella. Hydrobiologia 459: 103–123.

    Article  Google Scholar 

  • Okuniewska-Nowaczyk, I., M. Makohonienko, M. Latałowa, K. Milecka, K. M. Krupiński & D. Nalepka, 2004. Juniperus communis L. – juniper. In Ralska-Jasiewiczowa, M., M. Latałowa, K. Wasylikowa, K. Tobolski, E. Madeyska, H. E. Wright Jr. & C. Turner (eds), Late Glacial and Holocene History of Vegetation in Poland Based on Isopollen Maps. W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków: 125–133.

    Google Scholar 

  • Ralska-Jasiewiczowa, M. & M. Latałowa, 1996. Synthesis of palaeoecological events in Poland. In Berglund, B. E., H. J. B. Birks, M. Ralska-Jasiewiczowa & H. E. Wright (eds), Palaeoecological Events in Europe During the Last 15000 Years – Patterns, Processes and Problems. Wiley, Chichester: 403–472.

    Google Scholar 

  • Ralska-Jasiewiczowa, M., T. Goslar, T. Madeyska & L. Starkel (eds), 1998a. Lake Gościąż, Central Poland. A Monographic Study. Szafer Institute of Botany, Polish Academy of Sciences, Kraków.

    Google Scholar 

  • Ralska-Jasiewiczowa, M., B. Van Geel & D. Demske, 1998b. Holocene regional vegetation history recorded in the Lake Gościąż sediments. In Ralska-Jasiewiczowa, M., T. Goslar, T. Madeyska & L. Starkel (eds), Lake Gościąż, Central Poland. A Monographic Study. Szafer Institute of Botany. Polish Academy of Sciences, Kraków: 202–219.

    Google Scholar 

  • Ralska-Jasiewiczowa, M., D. Demske & B. Van Geel, 1998c. Late-glacial vegetation history recorded in the Lake Gościąż sediments. In Ralska-Jasiewiczowa, M., T. Goslar, T. Madeyska & L. Starkel (eds), Lake Gościąż, Central Poland. W. Szafer Institute of Botany, Kraków: 128–143.

    Google Scholar 

  • Ralska-Jasiewiczowa, M., M. Latałowa, K. Wasylikowa, K. Tobolski, E. Madeyska, H. E. Wright & C. Turner (eds), 2004. Late Glacial and Holocene History of Vegetation in Poland Based on Isopollen Maps. W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków.

    Google Scholar 

  • Rasmussen, S. O., B. M. Vinther, H. B. Clausen & K. K. Andersen, 2007. Early Holocene climate oscillations recorded in three Greenland ice cores. Quaternary Science Reviews 26: 1907–1914.

    Article  Google Scholar 

  • Saarnisto, M. & T. Saarinen, 2001. Deglaciation chronology of the Scandinavian Ice Sweet from the Lake Onega Basin to the Salpausselkä End Moraines. Global and Planetary Change 31: 387–405.

    Article  Google Scholar 

  • Sarmaja-Korjonen, K., M. Nyman, S. Kultti & M. Valiranta, 2006. Paleolimnological development of Lake Njargajarvi, northern Finnish Lapland, in a changing Holocene climate and environment. Journal of Paleolimnology 35: 65–81.

    Article  Google Scholar 

  • Seppä, H., D. Hammarlund & K. Antonsson, 2005. Low-frequency and high-frequency changes in temperature and effective humidity during the Holocene in south-central Sweden: implications for atmospheric and oceanic forcings of climate. Climate Dynamics 25: 285–297.

    Article  Google Scholar 

  • Subetto, D. A., B. Wohlfarth, N. Davydova, T. V. Sapelko, L. Björkman, N. Sołvieva, S. Vastegärd, G. Possnert & V. I. Khomutova, 2002. Climate and environment on the Karelian Isthmus, northwestern Russia, 13000–9000 cal yrs BP. Boreas 31: 1–19.

    Article  Google Scholar 

  • Szafer, W., 1972. Podstawy geobotanicznego podziału Polski. In Szafer, W. (ed.), Szata roślinna Polski. PWN, Warszawa II.

    Google Scholar 

  • Szeroczyńska, K., 1985. Cladocera jako wskaźnik ekologiczny w późnoczwartorzędowych osadach jeziornych Polski Północnej. Acta Palaeontologica Polonica 30(1–2): 3–69.

    Google Scholar 

  • Szeroczyńska, K., 1998a. The Holocene cladoceran succession in the laminated sediments of Lake Gościąż. In Ralska-Jasiewiczowi, M., T. Goslar, T. Madeyska & L. Starkel (eds), Lake Gościąż, Central Poland. A Monographic Study. Szafer Institute of Botany, Polish Academy of Sciences, Kraków: 219–225.

    Google Scholar 

  • Szeroczyńska, K., 1998b. Cladocera (Crustacea) as information source in studies of lake sediments. Studia Geologica Polonica 112: 9–28.

    Google Scholar 

  • Szeroczyńska, K. & K. Sarmaja-Korjonen, 2007. Atlas of Subfossil Cladocera from Central and Northern Europe. Friends of the Lower Vistula Society, Świecie.

    Google Scholar 

  • Szeroczyńska, K., A. Tatur, J. Weckstrom, M. Gąsiorowski, A. M. Noryśkiewicz & E. Sienkiewicz, 2007. Holocene environmental history in northwest Finnish Lapland reflected in the multi-proxy record of small subarctic lake. Journal of Paleolimnology 38: 25–47.

    Article  Google Scholar 

  • Timm, H., T. Möls & T. Timm, 2006. Effects of long-term non-point eutrophication on the abundance and biomass of macrozoobenthos in small lakes of Estonia. Proceedings of Estonian Academy of Sciences, Biology and Ecology 55: 187–198.

    Google Scholar 

  • Tinner, W. & A. F. Lotter, 2001. Central European vegetation response to abrupt climate change at 8.2 ka Geology 29: 551–554.

    Google Scholar 

  • Tobolski, K., 2000. Przewodnik do oznaczania torfów i osadów jeziornych. PWN, Warszawa.

    Google Scholar 

  • Troels-Smith, J., 1955a. Karakterisering af løse jordarter (Characterization of unconsolidated sediments). Danmark Geologiska Undersøgelse, IV 3: 1–73.

    Google Scholar 

  • Troels-Smith, J., 1955b. Karakteriserung af lose jordater. Danmarks Geologiske Undersogelse, 4 3(10): 1–73.

    Google Scholar 

  • Van der Linden, M. & B. van Geel, 2006. Late Holocene climate change and human impact recorded in a south Swedish ombrotrophic peat bog. Palaeogeography, Palaeoclimatology, Palaeoecology 240: 649–667.

    Article  Google Scholar 

  • Von Grafenstein, U., H. Erlenkeuser, A. Brauer, J. Jouzel & S. J. Johnsen, 1999. A mid-European decadal isotope-climate record from 15,500 to 5000 years BP. Science 284: 1654–1657.

    Article  Google Scholar 

  • Wacnik, A., 2003. Późnoglacjalne I wczesnoholoceńskie przemiany szaty roślinnej na podstawie analizy pyłkowej osadów laminowanych Jeziora Miłkowskiego na Pojezierzu Mazurskim. Ph.D. Thesis, W. Szafer Institute of Botany, Polish Academy of Science, Kraków.

  • Walanus, A. & D. Nalepka, 2010. Calibration of Mangerud’s boundaries. Radiocarbon 52(4): 1639–1644.

    CAS  Google Scholar 

  • White, W. B. & R. G. Peterson, 1996. An Antarctic circumpolar wave in surface pressure, wind, temperature and sea-ice extent. Nature 380: 699–702.

    Article  CAS  Google Scholar 

  • Więckowski, K., 1970. New type of lightweight piston core sample. Bulletin de l’Académie Polonaise des Sciences, Série des Sciences Géologique et Géographique 18(1): 57–62.

    Google Scholar 

  • Więckowski, K., 2009. Zagadnienia genezy, wieku i ewolucji jezior poszczególnych regionów Polski w świetle badań ich osadów dennych. Studia Limnologica et Telmatologica, Supp. 1: 29–72.

    Google Scholar 

  • Wohlfarth, B., T. Lacourse, O. Bennike, D. Subetto, P. Tarasov, I. Demidov, L. Filimonova & T. Sapelko, 2007. Climatic and environmental changes in northwestern Russia between 15, 000 and 8000 cal yr BP: a review. Quaternary Science Reviews 26: 1871–1883.

    Article  Google Scholar 

  • Woś, A., 2010. Klimat Polski w drugiej połowie XX wieku. Wydawnictwo Naukowe UAM, Poznań.

    Google Scholar 

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Acknowledgements

The paleoecological study of the Lake Sierzywk sediments was carried out as part of the “Dynamics of postglacial trophy changes of Lobelia Lakes” project, funded by the Polish Ministry of Science and Higher Education, No. 2 P04G 057 28. Grateful acknowledgements are made to A. van Loon for improving the English writing and two anonymous reviewers for their valuable comments on the manuscript.

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Guest editors: H. Eggermont & K. Martens / Cladocera as indicators of environmental change

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Milecka, K., Kowalewski, G. & Szeroczyńska, K. Climate-related changes during the Late Glacial and early Holocene in northern Poland, as derived from the sediments of Lake Sierzywk. Hydrobiologia 676, 187–202 (2011). https://doi.org/10.1007/s10750-011-0874-2

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