@article{fdi:010083226,
  title = {{A} minimalistic model of vegetation physiognomies in the savanna biome},
  author = {{D}jeumen, {I}. {V}. {Y}. and {D}umont, {Y}. and {D}oizy, {A}. and {C}outeron, {P}ierre},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e present and analyze a model aiming at recovering, as dynamical outcomes of fire-mediated tree-grass interactions, the wide range of vegetation physiognomies observable in the savanna biome along rainfall gradients at regional/continental scales. {T}he model is based on two ordinary differential equations ({ODE}), for woody and grass biomass. {I}t is parameterized from literature with respect to the {A}frican context and retains mathematical tractability, since we restricted it to the main processes, notably tree-grass asymmetric interactions (either facilitative or competitive) and the grass-fire feedback. {W}e used a fully qualitative analysis to derive all possible long term dynamics and express them in a bifurcation diagram in relation to mean annual rainfall and fire frequency. {W}e delineated domains of monostability (forest, grassland, savanna), of bistability (e.g. forest-grassland or forest-savanna) and even tristability. {N}otably, we highlighted regions in which two savanna equilibria may be jointly stable (possibly in addition to forest or grassland). {W}e verified that common knowledge about decreasing woody biomass with increasing fire frequency is verified for all levels of rainfall, contrary to previous attempts using analogous {ODE} frameworks. {T}hus, our framework appears able to render more realistic and diversified outcomes than often thought of regarding {ODE}. {O}ur model can help figure out the ongoing dynamics of savanna vegetation in large territories for which local data are sparse or absent.},
  keywords = {{F}orest ; {S}avanna ; {G}rassland ; {M}ean annual rainfall ; {F}ires ; {O}rdinary differential equations ; {A}lternative stable states ; {Q}ualitative analysis ; {S}ensitivity analysis ; {B}ifurcation diagram ; {R} shiny app ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{E}cological {M}odelling},
  volume = {440},
  numero = {},
  pages = {109381 [24 ]},
  ISSN = {0304-3800},
  year = {2021},
  DOI = {10.1016/j.ecolmodel.2020.109381},
  URL = {https://www.documentation.ird.fr/hor/fdi:010083226},
}