Palaeoecology of testate amoebae in a tropical peatland |
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| Institution: | 1. School of Geography, University of Leeds, Leeds LS2 9JT, UK;2. Laboratory of Wetland Ecology and Monitoring, Faculty of Geographical and Geological Sciences, Adam Mickiewicz University, Dzi?gielowa 27, 61-680 Poznań, Poland;3. Department of Biogeography and Palaeoecology, Faculty of Geographical and Geological Sciences, Adam Mickiewicz University, Dzi?gielowa 27, 61-680 Poznań, Poland;4. Institute of Environmental Biology, Faculty of Biology, Adam Mickiewicz University, Umultowska 89, 61-614 Poznań, Poland;5. Natural Resources Canada/Ressources naturelles Canada, Geological Survey of Canada/Commission géologique du Canada, Calgary, Alberta T2L 2A7, Canada;1. Geography, College of Life and Environmental Sciences, University of Exeter, UK;2. Water@leeds, School of Geography, University of Leeds, UK;3. Faculty of Soil Science, Lomonosov Moscow State University, Russia;4. Laboratory of Wetland Ecology and Monitoring & Department of Biogeography and Palaeoecology, Faculty of Geographical and Geological Sciences, Adam Mickiewicz University, Poland;5. Department of Geography, University of Sheffield, UK;6. Department of Zoology and Ecology, Penza State University, Russia;7. Department of Hydrobiology, Lomonosov Moscow State University, Russia;8. Institute of Biology, Faculty of Science, University of Neuchâtel, Switzerland;9. Environment, University of York, UK;10. Earth and Environmental Sciences, University of Waterloo, Canada;1. Department of Zoology and Ecology, Penza State University, Krasnaya str. 40, 440026 Penza, Russia;2. Laboratory of Soil Biology, Institute of Biology, University of Neuchâtel, rue Emile Argand 11, CH-2000 Neuchâtel, Switzerland;3. Jardin Botanique de Neuchâtel, Pertuis-du-Sault 56-58, CH-2000 Neuchâtel, Switzerland;4. Science Research Center, Hosei University, 2-17-1 Fujimi, Chiyoda-ku, 102-8160 Tokyo, Japan;5. Laboratory of Structural and Functional Organisation of Forest Ecosystems, Center for Problems of Ecology and Productivity of Forests, Russian Academy of Sciences, Profsoyuznaya str. 84/32, 117997 Moscow, Russia;1. Department of Biogeography and Paleoecology, Adam Mickiewicz University, Dzi?gielowa 27, 61-680 Poznań, Poland;2. Laboratory of Wetland Ecology and Monitoring, Adam Mickiewicz University, Dzi?gielowa 27, 61-680 Poznań, Poland;3. Institute of Environmental Biology, Adam Mickiewicz University, Umultowska 89, 61-614 Poznań, Poland;4. Kujawsko – Pomorski Research Centre, Institute of Technology and Life Sciences in Falenty, Glinki 60, 85-174 Bydgoszcz, Poland;5. Department of Environmental Resources and Geohazards, Institute of Geography and Spatial Organization, Polish Academy of Sciences, Kopernika 19, 87-100 Torun, Poland;6. GFZ German Research Centre for Geosciences, Section 5.2 – Climate Dynamics and Landscape Evolution, Telegrafenberg, D-14473 Potsdam, Germany;7. Department of Meteorology, Poznań University of Life Sciences, Pi?tkowska 94, 60-649 Poznan, Poland;1. water@leeds, School of Geography, University of Leeds, LS2 9JT, UK;2. Geography, College of Life and Environmental Sciences, University of Exeter, EX4 4RJ, UK;3. Water Resources and Environmental Engineering Research Group, Faculty of Technology, University of Oulu, Finland;1. Laboratory of Wetland Ecology and Monitoring, Adam Mickiewicz University, Dzi?gielowa 27, 61-680 Poznań, Poland;2. Department of Biogeography and Paleoecology, Adam Mickiewicz University, Dzi?gielowa 27, 61-680 Poznań, Poland;3. Institute of Plant Sciences and Oeschger Centre for Climate Change Research, University of Bern, Altenbergrain 21, 3013 Bern, Switzerland;4. Department of Environmental Resources and Geohazards, Institute of Geography and Spatial Organization, Polish Academy of Sciences, Kopernika 19, 87-100 Toruń, Poland;5. GFZ German Research Centre for Geosciences, Section 5.2–Climate Dynamics and Landscape Evolution, Telegrafenberg, D-14473 Potsdam, Germany;6. Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342 Kraków, Poland;1. Brandenburg University of Technology Cottbus-Senftenberg, Dept. General Ecology, 03013 Cottbus, Germany;2. Brandenburg University of Technology Cottbus-Senftenberg, Forschungszentrum Landschaftsentwicklung und Bergbaulandschaften (FZLB), 03013 Cottbus, Germany;3. Leibniz-Centre for Agricultural Landscape Research (ZALF) e.V., Institute of Soil Landscape Research, 15374 Müncheberg, Germany;4. University of Potsdam, Institute of Earth and Environmental Sciences, 14476 Potsdam, Germany |
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| Abstract: | We present the first detailed analysis of subfossil testate amoebae from a tropical peatland. Testate amoebae were analysed in a 4-m peat core from western Amazonia (Peru) and a transfer function developed from the site was applied to reconstruct changes in water table over the past ca. 8,000 years. Testate amoebae were in very low abundance in the core, especially in the lower 125 cm, due to a combination of poor preservation and obscuration by other organic matter. A modified preparation method enabled at least 50 testate amoebae to be counted in each core sample. The most abundant taxa preserved include Centropyxis aculeata, Hyalosphenia subflava, Phryganella acropodia and Trigonopyxis arcula. Centropyxis aculeata, an unambiguous wet indicator, is variably present and indicates several phases of near-surface water table. Our work shows that even degraded, low-abundance assemblages of testate amoebae can provide useful information regarding the long-term ecohydrological developmental history of tropical peatlands. |
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| Keywords: | Amazonia Palaeoecology Peatlands Testate amoebae Tropical rainforest |
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