Reduction of invertebrate herbivory by land use is only partly explained by changes in plant and insect characteristics
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In: Ecological Monographs, Vol. 93, No. 2, e1571, 05.2023.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Reduction of invertebrate herbivory by land use is only partly explained by changes in plant and insect characteristics
AU - Neff, Felix
AU - Prati, Daniel
AU - Achury, Rafael
AU - Ambarlı, Didem
AU - Bolliger, Ralph
AU - Brändle, Martin
AU - Freitag, Martin
AU - Hölzel, Norbert
AU - Kleinebecker, Till
AU - Knecht, Arturo
AU - Schäfer, Deborah
AU - Schall, Peter
AU - Seibold, Sebastian
AU - Staab, Michael
AU - Weisser, Wolfgang W.
AU - Pellissier, Loïc
AU - Gossner, Martin M.
N1 - Publisher Copyright: © 2023 The Authors. Ecological Monographs published by Wiley Periodicals LLC on behalf of The Ecological Society of America.
PY - 2023/5
Y1 - 2023/5
N2 - Invertebrate herbivory is a crucial process contributing to the cycling of nutrients and energy in terrestrial ecosystems. While the function of herbivory can decrease with land-use intensification, the underlying mechanisms remain unclear. We hypothesize that land-use intensification impacts invertebrate leaf herbivory rates mainly through changes in characteristics of plants and insect herbivores. We investigated herbivory rates (i.e., damaged leaf area) on the most abundant plant species in forests and grasslands and along land-use intensity gradients on 297 plots in three regions of Germany. To evaluate the contribution of shifts in plant community composition, we quantified herbivory rates at plant species level and aggregated at plant community level. We analyzed pathways linking land-use intensity, plant and insect herbivore characteristics, and herbivory rates. Herbivory rates at plant species and community level decreased with increasing land-use intensity in forests and grasslands. Path analysis revealed strong direct links between land-use intensity and herbivory rates. Particularly at the plant community level, differences in plant and herbivore composition also contributed to changes in herbivory rates along land-use intensity gradients. In forests, high land-use intensity was characterized by a larger proportion of coniferous trees, which was linked to reduced herbivory rates. In grasslands, changes in the proportion of grasses, plant fiber content, as well as the taxonomic composition of herbivore assemblages contributed to reduced herbivory rates. Our study highlights the potential of land-use intensification to impair ecosystem functioning across ecosystems via shifts in plant and herbivore characteristics. De-intensifying land use in grasslands and reducing the share of coniferous trees in temperate forests can help to restore ecosystem functionality in these systems.
AB - Invertebrate herbivory is a crucial process contributing to the cycling of nutrients and energy in terrestrial ecosystems. While the function of herbivory can decrease with land-use intensification, the underlying mechanisms remain unclear. We hypothesize that land-use intensification impacts invertebrate leaf herbivory rates mainly through changes in characteristics of plants and insect herbivores. We investigated herbivory rates (i.e., damaged leaf area) on the most abundant plant species in forests and grasslands and along land-use intensity gradients on 297 plots in three regions of Germany. To evaluate the contribution of shifts in plant community composition, we quantified herbivory rates at plant species level and aggregated at plant community level. We analyzed pathways linking land-use intensity, plant and insect herbivore characteristics, and herbivory rates. Herbivory rates at plant species and community level decreased with increasing land-use intensity in forests and grasslands. Path analysis revealed strong direct links between land-use intensity and herbivory rates. Particularly at the plant community level, differences in plant and herbivore composition also contributed to changes in herbivory rates along land-use intensity gradients. In forests, high land-use intensity was characterized by a larger proportion of coniferous trees, which was linked to reduced herbivory rates. In grasslands, changes in the proportion of grasses, plant fiber content, as well as the taxonomic composition of herbivore assemblages contributed to reduced herbivory rates. Our study highlights the potential of land-use intensification to impair ecosystem functioning across ecosystems via shifts in plant and herbivore characteristics. De-intensifying land use in grasslands and reducing the share of coniferous trees in temperate forests can help to restore ecosystem functionality in these systems.
KW - abundance
KW - composition
KW - diversity
KW - functional traits
KW - herbivorous insects
KW - invertebrate herbivory
KW - land-use intensity
KW - managed grasslands
KW - structural equation modeling
KW - temperate forests
KW - Biology
KW - Ecosystems Research
UR - http://www.scopus.com/inward/record.url?scp=85150895170&partnerID=8YFLogxK
U2 - 10.1002/ecm.1571
DO - 10.1002/ecm.1571
M3 - Journal articles
AN - SCOPUS:85150895170
VL - 93
JO - Ecological Monographs
JF - Ecological Monographs
SN - 0012-9615
IS - 2
M1 - e1571
ER -