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First Evidence That Nematode Communities in Deadwood Are Related to Tree Species Identity and to Co-Occurring Fungi and Prokaryotes

GND
1144959810
Affiliation
Helmholtz Centre for Environmental Research—UFZ, Department of Soil Ecology, 06120 Halle (Saale), Germany
Moll, Julia;
GND
1161672079
Affiliation
Helmholtz Centre for Environmental Research—UFZ, Department of Soil Ecology, 06120 Halle (Saale), Germany; Institute of Forest Botany, Technische Universität Dresden, 01737 Tharandt, Germany
Roy, Friederike;
GND
1213314887
Affiliation
Department of Conservation Biology, Institute of Ecology, Evolution and Diversity, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany; Department of Research, National Park Bavarian Forest, 94481 Grafenau, Germany
Bässler, Claus;
GND
1153578042
Affiliation
Center for Macroecology, Evolution and Climate, GLOBE Institute, University of Copenhagen, 2100 Copenhagen, Denmark
Heilmann-Clausen, Jacob;
GND
121711757
Affiliation
Institute of Environmental Biotechnology, Technische Universität Dresden, IHI Zittau, 02763 Zittau, Germany
Hofrichter, Martin;
Affiliation
Institute of Environmental Biotechnology, Technische Universität Dresden, IHI Zittau, 02763 Zittau, Germany
Kellner, Harald;
Affiliation
Institute of Forest Botany, Technische Universität Dresden, 01737 Tharandt, Germany
Krabel, Doris;
GND
1230837493
Affiliation
Julius Kühn-Institute (JKI), Institute for Epidemiology and Pathogen Diagnostics, Germany
Schmidt, Jan Henrik;
Affiliation
Helmholtz Centre for Environmental Research—UFZ, Department of Soil Ecology, 06120 Halle (Saale), Germany; German Centre for Integrative Biodiversity Research (iDiv) Halle—Jena—Leipzig, 04103 Leipzig, Germany
Buscot, Francois;
GND
1139391372
Affiliation
Julius Kühn-Institute (JKI), Institute for national and international plant health, Germany
Hoppe, Björn

Nematodes represent a diverse and ubiquitous group of metazoans in terrestrial environments. They feed on bacteria, fungi, plants, other nematodes or parasitize a variety of animals and hence may be considered as active members of many food webs. Deadwood is a structural component of forest ecosystems which harbors many niches for diverse biota. As fungi and bacteria are among the most prominent decomposing colonizers of deadwood, we anticipated frequent and diverse nematode populations to co-occur in such ecosystems. However, knowledge about their ability to colonize this habitat is still limited. We applied DNA-based amplicon sequencing (metabarcoding) of the 18S rRNA gene to analyze nematode communities in sapwood and heartwood of decaying logs from 13 different tree species. We identified 247 nematode ASVs (amplicon sequence variants) from 27 families. Most of these identified families represent bacterial and fungal feeders. Their composition strongly depended on tree species identity in both wood compartments. While pH and water content were the only wood properties that contributed to nematodes’ distribution, co-occurring fungal and prokaryotic (bacteria and archaea) - and-diversities were significantly related to nematode communities. By exploring thirteen different tree species, which exhibit a broad range of wood characteristics, this study provides first and comprehensive insights into nematode diversity in deadwood of temperate forests and indicates connectivity to other wood-inhabiting organisms.

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