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Peer-reviewedCC BYEcotoxicology (London, England)

Context-dependent sublethal hazard of glyphosate to non-target predators revealed by functional response analysis.

  • Jana Niedobová1,2
  • Radek Michalko3
  1. 1Department of Forest Ecology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemědělská 3, Brno, 613 00, Czech Republic. [email protected].
  2. 2Research and Breeding Institute of Pomology Holovousy Ltd, Holovousy 129, Hořice, 508 01, Czech Republic. [email protected].
  3. 3Department of Forest Ecology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemědělská 3, Brno, 613 00, Czech Republic.
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Abstract

Glyphosate, one of the most widely used herbicides globally, is a significant environmental contaminant that may affect non-target organisms crucial to ecosystem services, including biological pest control. While glyphosate targets the shikimate pathway in plants, which is absent in animals, there is increasing evidence that glyphosate induces sublethal effects on arthropod predators. However, the factors modulating these effects remain unclear. Here, we investigated how physiological context, specifically pre-treatment with the broad-spectrum antibiotic tetracycline, commonly used to experimentally alter host associated microbial communities, modulates the sublethal hazard of glyphosate-based herbicide (GBH) on the predatory behavior of adult female Pardosa wolf spiders. Predation efficiency was measured using functional response assays across varying prey densities. Our results showed that GBH significantly reduced the spiders' predation rates, confirming its sublethal toxicity. However, spiders pre-treated with antibiotics exhibited higher capture rates following GBH exposure compared to the GBH only group. These findings demonstrate that the sublethal hazard of GBH on predators is context-dependent and can be altered by antibiotic-sensitive processes (such as host-symbiont interactions). This study highlights the complexity of pesticide effects on ecosystem services and suggests that the functional response of non-target predators depends strongly on their physiological background.

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Cite

BibTeXRIS
BibTeX
@article{niedobova2026contextdependent,
  title = {{Context-dependent sublethal hazard of glyphosate to non-target predators revealed by functional response analysis.}},
  author = {Jana Niedobová and Radek Michalko},
  journal = {Ecotoxicology (London, England)},
  year = {2026},
  month = oct,
  doi = {10.1007/s10646-026-03179-5},
  url = {https://europepmc.org/article/MED/42909559},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Context-dependent sublethal hazard of glyphosate to non-target predators revealed by functional response analysis.
AU  - Jana Niedobová
AU  - Radek Michalko
PY  - 2026
DA  - 2026/10/23
JO  - Ecotoxicology (London, England)
DO  - 10.1007/s10646-026-03179-5
UR  - https://europepmc.org/article/MED/42909559
AB  - Glyphosate, one of the most widely used herbicides globally, is a significant environmental contaminant that may affect non-target organisms crucial to ecosystem services, including biological pest control. While glyphosate targets the shikimate pathway in plants, which is absent in animals, there is increasing evidence that glyphosate induces sublethal effects on arthropod predators. However, the factors modulating these effects remain unclear. Here, we investigated how physiological context, specifically pre-treatment with the broad-spectrum antibiotic tetracycline, commonly used to experimentally alter host associated microbial communities, modulates the sublethal hazard of glyphosate-based herbicide (GBH) on the predatory behavior of adult female Pardosa wolf spiders. Predation efficiency was measured using functional response assays across varying prey densities. Our results showed that GBH significantly reduced the spiders' predation rates, confirming its sublethal toxicity. However, spiders pre-treated with antibiotics exhibited higher capture rates following GBH exposure compared to the GBH only group. These findings demonstrate that the sublethal hazard of GBH on predators is context-dependent and can be altered by antibiotic-sensitive processes (such as host-symbiont interactions). This study highlights the complexity of pesticide effects on ecosystem services and suggests that the functional response of non-target predators depends strongly on their physiological background.
SN  - 0963-9292
SN  - 1573-3017
ER  -