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Environmental selection and spatiotemporal structure of a major group of soil protists (Rhizaria: Cercozoa) in a temperate grassland

View ORCID ProfileAnna Maria Fiore-Donno, Tim Richter-Heitmann, View ORCID ProfileFlorine Degrune, View ORCID ProfileKenneth Dumack, View ORCID ProfileKathleen M. Regan, Sven Mahran, View ORCID ProfileRuna S. Boeddinghaus, View ORCID ProfileMatthias C. Rillig, View ORCID ProfileMichael W. Friedrich, Ellen Kandeler, View ORCID ProfileMichael Bonkowski
doi: https://doi.org/10.1101/531970
Anna Maria Fiore-Donno
1Terrestrial Ecology Group, Institute of Zoology, University of Cologne, Cologne, Germany
2Cluster of Excellence on Plant Sciences (CEPLAS), Cologne, Germany
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  • For correspondence: afiore-donno6@infomaniak.ch
Tim Richter-Heitmann
3Microbial Ecophysiology Group, Faculty of Biology/Chemistry, University of Bremen, Bremen, Germany
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Florine Degrune
4Insitute of Biology, Plant Ecology, Freie Universität Berlin, Berlin, Germany
5Berlin-Brandenburg Institute of Advanced Biodiversity Research, Berlin, Germany
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Kenneth Dumack
1Terrestrial Ecology Group, Institute of Zoology, University of Cologne, Cologne, Germany
2Cluster of Excellence on Plant Sciences (CEPLAS), Cologne, Germany
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Kathleen M. Regan
6Ecosystems Center, Marine Biological Laboratory, Woods Hole, MA USA
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Sven Mahran
7Institute of Soil Science and Land Evaluation, Department of Soil Biology, University of Hohenheim, Stuttgart-Hohenheim, Germany.
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Runa S. Boeddinghaus
7Institute of Soil Science and Land Evaluation, Department of Soil Biology, University of Hohenheim, Stuttgart-Hohenheim, Germany.
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  • ORCID record for Runa S. Boeddinghaus
Matthias C. Rillig
4Insitute of Biology, Plant Ecology, Freie Universität Berlin, Berlin, Germany
5Berlin-Brandenburg Institute of Advanced Biodiversity Research, Berlin, Germany
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Michael W. Friedrich
3Microbial Ecophysiology Group, Faculty of Biology/Chemistry, University of Bremen, Bremen, Germany
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  • ORCID record for Michael W. Friedrich
Ellen Kandeler
7Institute of Soil Science and Land Evaluation, Department of Soil Biology, University of Hohenheim, Stuttgart-Hohenheim, Germany.
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Michael Bonkowski
1Terrestrial Ecology Group, Institute of Zoology, University of Cologne, Cologne, Germany
2Cluster of Excellence on Plant Sciences (CEPLAS), Cologne, Germany
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Abstract

Soil protists are increasingly appreciated as essential components of soil foodwebs; however, there is a dearth of information on the factors structuring their communities. Here we investigate the importance of different biotic and abiotic factors as key drivers of spatial and seasonal distribution of protistan communities. We conducted an intensive survey of a 10m2 grassland plot in Germany, focusing on a major group of protists, the Cercozoa. From 177 soil samples, collected from April to November, we obtained 694 Operational Taxonomy Units representing >6 million Illumina reads. All major cercozoan groups were present, dominated by the small flagellates of the Glissomonadida. We found evidence of environmental filtering structuring the cercozoan communities both spatially and seasonally. Spatial analyses indicated that communities were correlated within a range of four meters. Seasonal variations of bactevirores and bacteria, and that of omnivores after a time-lapse, suggested a dynamic prey-predator succession. The most influential edaphic properties were moisture and clay content, which differentially affected each functional group. Our study is based on an intense sampling of protists at a small scale, thus providing a detailed description of the niches occupied by different taxa/functional groups and the ecological processes involved.

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Posted January 27, 2019.
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Environmental selection and spatiotemporal structure of a major group of soil protists (Rhizaria: Cercozoa) in a temperate grassland
Anna Maria Fiore-Donno, Tim Richter-Heitmann, Florine Degrune, Kenneth Dumack, Kathleen M. Regan, Sven Mahran, Runa S. Boeddinghaus, Matthias C. Rillig, Michael W. Friedrich, Ellen Kandeler, Michael Bonkowski
bioRxiv 531970; doi: https://doi.org/10.1101/531970
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Environmental selection and spatiotemporal structure of a major group of soil protists (Rhizaria: Cercozoa) in a temperate grassland
Anna Maria Fiore-Donno, Tim Richter-Heitmann, Florine Degrune, Kenneth Dumack, Kathleen M. Regan, Sven Mahran, Runa S. Boeddinghaus, Matthias C. Rillig, Michael W. Friedrich, Ellen Kandeler, Michael Bonkowski
bioRxiv 531970; doi: https://doi.org/10.1101/531970

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