@article{fdi:010058873,
  title = {{E}xperimental support of the stress-gradient hypothesis in herbivore-herbivore interactions},
  author = {{D}angles, {O}livier and {H}errera, {M}. and {A}nthelme, {F}abien},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he stress-gradient hypothesis ({SGH}) postulates an increase in the frequency of positive species interactions at increasing amounts of stress. {W}hile the {SGH} has been extensively tested in plant-plant interactions along abiotic stresses, it remains unclear whether this hypothesis could apply to higher trophic levels, such as herbivores, along biotic stress gradients. {T}o address this issue, we investigated how the interaction between two potato herbivores may change along a stress gradient created by an assortment of potato varieties with different tuber palatability. {W}e used a tuber resistance trait as a measure for biotic stress and one herbivore as the facilitator to gain access to the tuber of the other herbivore. {O}ur experiment revealed a switch from neutral to positive interactions with increasing stress, confirming for the first time the predictions of the {SGH} for herbivores. {M}oreover, the intensity of facilitation decreased at high stress levels, suggesting that benefits by the facilitating species were dampened in the most stressful environment. {I}n view of the ubiquitous role played by positive interactions among herbivores, broadening our search image for facilitative effects among other plant enemies will allow a better awareness of the importance of the {SGH} in structuring plant communities.},
  keywords = {biotic stress ; facilitation ; plant antagonists ; species interaction ; stress-gradient hypothesis ({SGH})},
  booktitle = {},
  journal = {{N}ew {P}hytologist},
  volume = {197},
  numero = {2},
  pages = {405--408},
  ISSN = {0028-646{X}},
  year = {2013},
  DOI = {10.1111/nph.12080},
  URL = {https://www.documentation.ird.fr/hor/fdi:010058873},
}