Jauss, Robin-Tobias
[Author];
Walden, Susanne
[Author];
Fiore-Donno, Anna Maria
[Author];
Schaffer, Stefan
[Author];
Wolf, Ronny
[Author];
Feng, Kai
[Author];
Bonkowski, Michael
[Author];
Schlegel, Martin
[Author]
A Parasite’s Paradise: Biotrophic Species Prevail Oomycete Community Composition in Tree Canopies
You can manage bookmarks using lists, please log in to your user account for this.
Media type:
E-Article
Title:
A Parasite’s Paradise: Biotrophic Species Prevail Oomycete Community Composition in Tree Canopies
Contributor:
Jauss, Robin-Tobias
[Author];
Walden, Susanne
[Author];
Fiore-Donno, Anna Maria
[Author];
Schaffer, Stefan
[Author];
Wolf, Ronny
[Author];
Feng, Kai
[Author];
Bonkowski, Michael
[Author];
Schlegel, Martin
[Author]
imprint:
Lausanne: Frontiers Media S.A., [2023]
Published in:Frontiers in Forests and Global Change ; 4,668895 (2021), Seite 1-9
Description:
Oomycetes (Stramenopiles, protists) are among the most severe plant pathogens,comprising species with a high economic and ecologic impact on forest ecosystems.Their diversity and community structures are well studied in terrestrial habitats, buttree canopies as huge and diverse habitats have been widely neglected. A recentstudy highlighted distinct oomycete communities in the canopy stratum compared tothe ground region of three temperate deciduous trees (Quercus robur, Tilia cordata,Fraxinus excelsior). While the communities from the two strata were distinct whentaking oomycete abundances into account, they were rather similar when only OTUpresence/absence was considered. It remains, however, unknown if this homogeneityin the OTU presence also leads to a functional homogenisation among microhabitatswithin the two strata ground and canopy. In this study, we supplemented functionaltraits to oomycete communities in the tree microhabitats, which were determinedover a time period of 2 years with a metabarcoding approach. Our results showedthat even though most oomycetes occurred in all microhabitats, a strong discrepancybetween the strata and correspondingly the distribution of oomycete lifestyles couldbe observed. This pattern was constant over several seasons. Obligate biotrophicspecies, exclusively feeding on living host tissue, dominated the canopy region,implying tree canopies to be a hitherto neglected reservoir for parasitic protists. OTUsassigned to the genus Hyaloperonospora—parasites highly specialised on hosts thatwere not sampled—could be determined in high abundances in the canopy and thesurrounding air, challenging the strict host dependencies ruled for some oomycetes.Our findings further contribute to the understanding of oomycete ecosystem functioningin forest ecosystems