@article{fdi:010076531,
  title = {{A} dynamic model of facilitation on environmental stress gradients},
  author = {{D}angles, {O}livier},
  editor = {},
  language = {{ENG}},
  abstract = {{T}heories based on competition for resources in animals and other non-sessile organisms rarely consider the role of facilitative interactions. {Y}et these interactions are important for community assembly, especially under stressful environments (e.g. the stress-gradient hypothesis, {SGH}). {T}o make an explicit link between species interaction theory and {SGH} patterns, {I} used a classic resource competition model promoting coexistence between a beneficiary and its facilitator sharing a common resource along a stress gradient. {I} compared model outcomes for two fundamentally different mechanisms of facilitation (alleviation of resource versus non-resource stress), and also tested the effect of a reciprocal cost of facilitation from the beneficiary. {I} then tested model's biological relevance using experimental data from two tuber moth species ({L}epidoptera, {G}elechiidae) for which facilitation in resource access was previously established. {S}imulation outcomes revealed that both the mode of facilitation and the incorporation of facilitation costs affected the shape of the facilitation-stress relationship. {T}hese predictions are in line with current {SGH} observations and experiments on both plants and animals and reconcile the frequently reported variability of this relationship in nature. {M}oreover, a sensitivity analysis of model's parameters confirmed the robustness of the modelling framework to uncover the mechanisms responsible for observed species interaction-stress patterns. {F}inally, when parameterized with tuber moth demographic data, model's results corresponded to observed interaction outcomes along resource stress gradients. {O}verall, having a common model for plants and animals may simplify assumptions in {SGH} studies, allow contrasting the shapes of different consumer-resource relationships and specifying the conditions that favour one type of interaction outcome over another.},
  keywords = {community ecology ; herbivores ; modelling ; species interactions ; stress ; gradient hypothesis},
  booktitle = {},
  journal = {{O}ikos},
  volume = {128},
  numero = {8},
  pages = {1206--1214},
  ISSN = {0030-1299},
  year = {2019},
  DOI = {10.1111/oik.06136},
  URL = {https://www.documentation.ird.fr/hor/fdi:010076531},
}