A field test of whether herbivores mitigate the effects of plant invasions on soil biodiversity

Research Highlight: Marco Fioratti Junod, Irene Cordero, Nadia Chinn, Jennifer Firn, Julia Holmes, Marcus Klein, Gabrielle Lebbink, Uffe N. Nielsen, Martin Schütz, Stephan Zimmermann, Anita C. Risch. (2025). Herbivory mediates the response of below-ground food webs to invasive grasses. Journal of Animal Ecology. https://doi.org/10.1111/1365-2656.70113. A recent paper by Junod et al. (2025) tested whether herbivores could mitigate the effects of invasive African lovegrass on soil biodiversity in Australian grasslands. They found that herbivores, including livestock, native mammals and invertebrates, acted to reverse four of the 13 negative effects that African lovegrass had on soil biodiversity and function. Their work demonstrated two mechanisms through which herbivores may have acted-reducing plant litter and increasing soil temperature. The paper also highlights the difficulty of predicting the response of soil biodiversity to change because of unclear interdependencies among organisms. General techniques such as food web models, isotopic tracers and more detailed study of the lives of soil organisms will help us bridge this knowledge gap.