Climate and human induced hydrological change since AD 800 in an ombrotrophic mire in Pomerania (N Poland) tracked by testate amoebae, macro-fossils, pollen and tree rings of pine |
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| Authors: | MARIUSZ LAMENTOWICZ KRYSTYNA MILECKA MARIUSZ GA&#;KA ANNA CEDRO JACEK PAWLYTA NATALIA PIOTROWSKA &#;UKASZ LAMENTOWICZ WILLEM O VAN DER KNAAP |
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| Institution: | Department of Biogeography and Palaeoecology, Adam Mickiewicz University (Faculty of Geographical and Geological Science), Dzi?gielowa 27, PL-61-680 Poznań, Poland;;University of Szczecin Laboratory of Climatology and Marine Meteorology, Institute of Marine Science Faculty of Natural Science, University of Szczecin, Poland;;Department of Radioisotopes, Institute of Physics, Silesian University of Technology, Krzywoustego 2, PL-44-100 Gliwice, Poland;;Department of Hydrobiology, Faculty of Biology, Adam Mickiewicz University, Umultowska 89, PL-61-614 Poznań, Poland;;Institute of Plant Sciences, University of Bern, Altenbergrain 21, CH-3013 Bern, Switzerland |
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| Abstract: | This high-resolution, multiproxy, palaeoenvironmental study of the S?owińskie B?ota raised bog in N Poland, 10 km from the Baltic Sea, covering the last 1200 years reveals different aspects of environmental change in a range of spatial scales from local to regional. Testate amoebae allowed quantitative reconstruction of the local water table using a transfer function based on a training set from N and W Poland. Special attention is paid to the testate amoeba Arcella discoides , which responds to rapid water-table fluctuations more than to average surface wetness. Macrofossils supported by local pollen tracked the local vegetation dynamics caused by local human impact and disturbance, including nutrients. Regional pollen showed human-induced landscape change outside the bog. Tree rings of Pinus sylvestris reflected the history of tree establishment and desiccation of the bog. Strong correlations between DCA axes 1 of regional pollen, of macrofossils and of testate amoebae, and a testate-amoebae-based water-table reconstruction that excludes A. discoides , indicate that changes on all spatial scales are linked, which is explained by a strong hydrologic connection between bog and surroundings. The combination of proxies shows that groundwater levels were modified by both human impact and climate change. |
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