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The windblown: possible explanations for dinophyte DNA in forest soils

View ORCID ProfileMarc Gottschling, View ORCID ProfileLucas Czech, View ORCID ProfileFrédéric Mahé, View ORCID ProfileSina Adl, View ORCID ProfileMicah Dunthorn
doi: https://doi.org/10.1101/2020.08.07.242388
Marc Gottschling
aDepartment Biologie, Systematische Botanik und Mykologie, GeoBio-Center, Ludwig-Maximilians-Universität München, D-80638 Munich, Germany
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Lucas Czech
bComputational Molecular Evolution Group, Heidelberg Institute for Theoretical Studies, D-69118 Heidelberg, Germany
cDepartment of Plant Biology, Carnegie Institution for Science, Stanford, CA 94305, USA
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Frédéric Mahé
dCIRAD, UMR BGPI, F-34398, Montpellier, France
eBGPI, Université de Montpellier, CIRAD, IRD, Montpellier SupAgro, Montpellier, France
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Sina Adl
fDepartment of Soil Sciences, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, S7N 5A8, SK, Canada
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Micah Dunthorn
gEukaryotic Microbiology, Faculty of Biology, Universität Duisburg-Essen, D-45141 Essen, Germany
hCentre for Water and Environmental Research (ZWU), Universität Duisburg-Essen, D-45141 Essen, Germany
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  • For correspondence: micah.dunthorn@uni-due.de
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ABSTRACT

Dinophytes are widely distributed in marine- and fresh-waters, but have yet to be conclusively documented in terrestrial environments. Here we evaluated the presence of these protists from an environmental DNA metabarcoding dataset of Neotropical rainforest soils. Using a phylogenetic placement approach with a reference alignment and tree, we showed that the numerous sequencing reads that were assigned to the dinophytes did not associate with taxonomy, environmental preference, nutritional mode, or dormancy. All the dinophytes in the soils are most likely windblown dispersal units of aquatic species, and are not biologically active residents of terrestrial environments.

Competing Interest Statement

The authors have declared no competing interest.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted August 10, 2020.
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The windblown: possible explanations for dinophyte DNA in forest soils
Marc Gottschling, Lucas Czech, Frédéric Mahé, Sina Adl, Micah Dunthorn
bioRxiv 2020.08.07.242388; doi: https://doi.org/10.1101/2020.08.07.242388
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The windblown: possible explanations for dinophyte DNA in forest soils
Marc Gottschling, Lucas Czech, Frédéric Mahé, Sina Adl, Micah Dunthorn
bioRxiv 2020.08.07.242388; doi: https://doi.org/10.1101/2020.08.07.242388

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