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Research article - Peer-reviewed, 2022

Imprints of latitude, host taxon, and decay stage on fungus-associated arthropod communities

Koskinen, Janne S.; Abrego, Nerea; Vesterinen, Eero J.; Schulz, Torsti; Roslin, Tomas; Nyman, Tommi;

Abstract

Interactions among fungi and insects involve hundreds of thousands of species. While insect communities on plants have formed some of the classic model systems in ecology, fungus-based communities and the forces structuring them remain poorly studied by comparison. We characterize the arthropod communities associated with fruiting bodies of eight mycorrhizal basidiomycete fungus species from three different orders along a 1200-km latitudinal gradient in northern Europe. We hypothesized that, matching the pattern seen for most insect taxa on plants, we would observe a general decrease in fungal-associated species with latitude. Against this backdrop, we expected local communities to be structured by host identity and phylogeny, with more closely related fungal species sharing more similar communities of associated organisms. As a more unique dimension added by the ephemeral nature of fungal fruiting bodies, we expected further imprints generated by successional change, with younger fruiting bodies harboring communities different from older ones. Using DNA metabarcoding to identify arthropod communities from fungal fruiting bodies, we found that latitude left a clear imprint on fungus-associated arthropod community composition, with host phylogeny and decay stage of fruiting bodies leaving lesser but still-detectable effects. The main latitudinal imprint was on a high arthropod species turnover, with no detectable pattern in overall species richness. Overall, these findings paint a new picture of the drivers of fungus-associated arthropod communities, suggesting that latitude will not affect how many arthropod species inhabit a fruiting body but, rather, what species will occur in it and at what relative abundances (as measured by sequence read counts). These patterns upset simplistic predictions regarding latitudinal gradients in species richness and in the strength of biotic interactions.

Keywords

arthropod; decay; fruiting bodies; fungi; fungivory; fungus-insect interactions; latitudinal gradient; succession

Published in

Ecological Monographs

2022, volume: 92, number: 3, article number: e1516
Publisher: WILEY

Authors' information

Koskinen, Janne S.
University of Eastern Finland
Koskinen, Janne S.
University of Helsinki
Abrego, Nerea
University of Helsinki
Abrego, Nerea
University of Jyvaskyla
Vesterinen, Eero J. (Vesterinen, Eero J.)
University of Turku
Schulz, Torsti
University of Helsinki
Swedish University of Agricultural Sciences, Department of Ecology
University of Helsinki
Nyman, Tommi
Norwegian Institute of Bioeconomy Research

UKÄ Subject classification

Ecology

Publication Identifiers

DOI: https://doi.org/10.1002/ecm.1516

URI (permanent link to this page)

https://res.slu.se/id/publ/116758