@article{fdi:010048468,
  title = {{NEATS}: {A} {N}etwork {E}conomics {A}pproach to {T}rophic {S}ystems},
  author = {{M}ullon, {C}hristian and {S}hin, {Y}unne-{J}ai and {C}ury, {P}hilippe},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he main principle of the economic approach to a trophic system we propose here lies in assuming that there is a transfer of food along a path between a prey and a predator if, for the predator, the benefits are greater than costs of predation on this path. {C}onversely, if the costs exceed the benefits, there are no flows. {T}his trade-off, considered all along the food chains of an ecosystem, together with ecological processes (assimilation, somatic maintenance) results in a model coupling mass balance equations (biological constraints) and complementarity principles ({W}alras' law). {H}ere is the core of the {N}etwork {E}conomics {A}pproach to {T}rophic {S}ystems ({NEATS}). {W}e illustrate with simple examples of ecosystems how these principles result in algebraic equations which can be analyzed mathematically and solved numerically. {W}e show, in a more sophisticated example of an input/output trophic network, that they result in "affine variational inequalities", whose solutions can be estimated. {W}e make explicit how the approach can be applied to address ecological questions, concerning differences of productivity, causes of biological diversity, or the nature of controls in marine ecosystems.},
  keywords = {{F}ood web ; {M}arine ecosystem ; {E}conomic equilibrium ; {V}ariational inequality},
  booktitle = {},
  journal = {{E}cological {M}odelling},
  volume = {220},
  numero = {21},
  pages = {3033--3045},
  ISSN = {0304-3800},
  year = {2009},
  DOI = {10.1016/j.ecolmodel.2009.02.008},
  URL = {https://www.documentation.ird.fr/hor/fdi:010048468},
}