@article{fdi:010018589,
  title = {{R}un-on contribution to a sahelian two-phase mosaic system : soil water regime and vegetation life cycles},
  author = {{S}eghieri, {J}osiane and {G}alle, {S}ylvie},
  editor = {},
  language = {{ENG}},
  abstract = {{A}n experiment was carried out from 1992 to 1995, in {S}outh-{W}estern {N}iger on a banded vegetation pattern which dominates on a laterite-capped plateau in the region. {W}e quantified the changes in infiltration and vegetation in a thicket from which run-on from the upslope bare soil zone was artificially divested. {A} concret wall (40 m long, 60 cm high, 20 cm thick, with a foundation 25 cm deep) was constructed at its upslope boundary. {I}nfiltration was measured to a depth of 5.4 m by a neutron probe, and densities of annual plants were monitored along transects crossing perpendicularly a control thicket and the thicket deprived of run-on. {P}henological phases and leaf water potential of the two dominant shrub species were recorded from stratified sampling according to their preferred location along the water resource gradient. {R}esults indicated that run-on contributed the most to infiltration in the central zone, but the water content available to the annual plants (layer 0-10 cm) between zones (upslope and central), and between thickets after the wall was built. {H}owever, in the thicket deprived of run-on, life cycle and physiology of the shrubs were severely disturbed upslope, while much smaller effects were observed in the centre. {S}urprisingly, within the study interval, run-on contribution was not found to be as essential to shrubs' life cycle at the location where it contributed the most to the infiltration. ({R}{\'e}sum{\'e} d'auteur)},
  keywords = {{FORMATION} {VEGETALE} ; {DYNAMIQUE} {DE} {VEGETATION} ; {PHENOLOGIE} ; {RESSOURCES} {EN} {EAU} ; {COUVERT} {VEGETAL} ; {CARACTERISTIQUE} {HYDRIQUE} ; {INFILTRATION} ; {ETUDE} {EXPERIMENTALE} ; {BROUSSE} {TIGREE} ; {NIGER} ; {BANIZOUMBOU} {REGION}},
  booktitle = {},
  journal = {{A}cta {O}ecologica},
  volume = {20},
  numero = {3},
  pages = {209--217},
  ISSN = {1146-609{X}},
  year = {1999},
  DOI = {10.1016/{S}1146-609{X}(99)80033-2},
  URL = {https://www.documentation.ird.fr/hor/fdi:010018589},
}