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Research article - Peer-reviewed, 2021

Plant-microbe interactions in response to grassland herbivory and nitrogen eutrophication

Sveen, Tord Ranheim; Netherway, Tarquin; Juhanson, Jaanis; Oja, Jane; Borgstrom, Pernilla; Viketoft, Maria; Strengbom, Joachim; Bommarco, Riccardo; Clemmensen, Karina; Hallin, Sara; Bahram, Mohammad

Abstract

Plant-soil feedback is increasingly recognized as a vital framework to analyze multi-trophic interactions involving herbivores, plants and microbes, but research is still lacking on understanding such feedback in the context of global change. In grasslands, patterns of herbivory are expected to be affected by global change, further modifying existing plant-soil feedbacks. We tested this by evaluating the individual and combined impacts of aboveground herbivory by a generalist leaf-chewer and nitrogen (N) eutrophication, simulating elevated N deposition, on soil microbial communities and root colonization of arbuscular mycorrhizal fungi and related these to existing data on plant functional types and community composition. We found that colonization of arbuscular mycorrhizal fungi in the plant roots responded differently to treatments depending on host plant species in patterns consistent with the changes in the plant community composition and biomass. Further, the effect of aboveground herbivory on plant-soil interactions was comparable and even exceeded that of N-eutrophication, with the additive effects of herbivory and N-eutrophication on the soil microbiome being stronger than each factor separately. Our results suggest that plant-soil feedback in response to N-eutrophication is contingent on biotic variables such as herbivory and plant species, and that biotic and abiotic disturbances may have additive effects on the soil microbiome structure.

Keywords

AM fungi; Aboveground herbivory; Global change; Nitrification; Plant-soil feedback; Plant functional type; Soil microbiome

Published in

Soil Biology and Biochemistry
2021, volume: 156, article number: 108208
Publisher: PERGAMON-ELSEVIER SCIENCE LTD

Authors' information

Swedish University of Agricultural Sciences, Department of Ecology
Swedish University of Agricultural Sciences, Department of Ecology
Swedish University of Agricultural Sciences, Department of Forest Mycology and Plant Pathology
Oja, Jane
University of Tartu
Borgström, Pernilla
Lund University
Swedish University of Agricultural Sciences, Department of Ecology
Swedish University of Agricultural Sciences, Department of Ecology
Swedish University of Agricultural Sciences, Department of Ecology
Clemmensen, Karina Engelbrecht (Engelbrecht Clemmensen, Karina)
Swedish University of Agricultural Sciences, Department of Forest Mycology and Plant Pathology
Swedish University of Agricultural Sciences, Department of Forest Mycology and Plant Pathology
Swedish University of Agricultural Sciences, Department of Ecology
University of Tartu

Sustainable Development Goals

SDG15 Life on land

UKÄ Subject classification

Soil Science

Publication Identifiers

DOI: https://doi.org/10.1016/j.soilbio.2021.108208

URI (permanent link to this page)

https://res.slu.se/id/publ/111886