Seasonal changes in Sphagnum peatland testate amoeba communities along a hydrological gradient |
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| Institution: | 1. Department of Environmental Resources and Geohazards, Institute of Geography and Spatial Organization, Polish Academy of Sciences, Twarda 51/55, 00-818 Warszawa, Poland;2. GFZ German Research Centre for Geosciences, Section 5.2–Climate Dynamics and Landscape Evolution, Telegrafenberg, D-14473 Potsdam, Germany;3. Department of Biogeography and Paleoecology, Adam Mickiewicz University, Krygowskiego 10, 61-680 Poznań, Poland;4. Laboratory of Wetland Ecology and Monitoring, Adam Mickiewicz University, Krygowskiego 10, 61-680 Poznań, Poland;5. Department of Invertebrate Zoology and Hydrobiology, University of Łódź, Banacha 12/16, 90-237 Łódź, Poland;6. Institute of Geological Sciences, Polish Academy of Sciences, Twarda 51/55, 00-818 Warsaw, Poland;7. Institute of Geology, Faculty of Geographical and Geological Science, Adam Mickiewicz University, Maków Polnych, 16 61-606 Poznań, Poland;8. Institute of Geography, Pedagogical University of Cracow, Podchorążych 2, 30-084 Kraków, Poland;9. Kujawsko–Pomorski Research Centre, Institute of Technology and Life Sciences in Falenty, Glinki 60, 85-174 Bydgoszcz, Poland;10. Geology and Paleogeography Unit, Faculty of Geosciences, Institute of Marine and Coastal Sciences, University of Szczecin, Mickiewicza 18, 70-383 Szczecin, Poland;11. Department of Geomorphology and Palaeogeography, Faculty of Geographical Sciences, University of Łódź, ul. Narutowicza 88, PL 90-139 Łódź, Poland;12. GADAM Centre of Excellence, Department of Radioisotopes, Institute of Physics – CSE, Silesian University of Technology, Konarskiego 22B, 44-100 Gliwice, Poland |
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| Abstract: | Testate amoebae are an abundant and functionally important group of protists in peatlands, but little is known about the seasonal patterns of their communities. We investigated the relationships between testate amoeba diversity and community structure and water table depth and light conditions (shading vs. insolation) in a Sphagnum peatland in Northern Poland (Linje mire) in spring and summer 2010. We monitored the water table at five sites across the peatland and collected Sphagnum samples in lawn and hummock micro-sites around each piezometer, in spring (3 May) and mid-summer (6 August) 2010. Water table differed significantly between micro-sites and seasons (Kruskal–Wallis test, p = 0.001). The community structure of testate amoebae differed significantly between spring and summer in both hummock and lawn micro-sites. We recorded a small, but significant drop in Shannon diversity, between spring and summer (1.76 vs. 1.72). Strongest correlations were found between testate amoeba communities and water table lowering and light conditions. The relative abundance of mixotrophic species Hyalosphenia papilio, Archerella flavum and of Euglypha ciliata was higher in the summer. |
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| Keywords: | Air temperature Diversity Growing season Light conditions Peatland hydrology Seasonality |
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