The effect of fire on the distribution of large wild herbivores during the late dry season was studied in northern Tanzania during October 1987. All species were attracted to burnt-over areas with 1-10 cm regrowth of grass. Recently burnt areas with no regrowth and areas not burnt during the dry season were avoided.By the end of the dry season the study area was left as a fire mosaic, with different areas burnt at different times during the dry season. Thirty two percent was unburnt. The fires were mainly man-made but for purposes other than wildlife management. Such a fire mosaic has a positive effect on the larger herbivores by supplying protein-rich food during the dry season. RCsumCOn a CtudiC en octobre 1987, durant la deuxieme saison seche l'effet du feu sur la distribution de grands herbivores dans le nord de la Tanzanie.Toutes les espkces sont attirCes par les surfaces brGlCes oG les repousses sont de 1 a 10 cm. Les surfaces sans repousses et les zones non brdees sont CvitCes. A la fin de la saison seche, la zone CtudiCe ressemblait a une mosaique due au feu, avec des endroits brGlCs a des moments difftrents durant la saison seche. Trente-deux pourcents n'avaient pas briile. La plupart des feux avaient CtC allumes par l'homme, mais dans d'autres buts que la gestion de la faune. Une telle mosaique a un effet positif sur les grands herbivores car elle fournit un complbment de nourriture riche en protCines au cours de la saison s8che.
Summary Found‐ivory records complement the information provided by aerial surveys to illustrate changes in the Ruaha elephant population between 1973 and 1988. Intense poaching in the late 1970s and early 1980s reduced the numbers of elephants by about 60% and also distorted the age structure of the survivors. There are now few cows > 34 years and few bulls > 16 years. Footprint measurements in 1989 showed a lack of calves aged 2 to 9 years but many new‐born infants.
SummaryThe baobab tree population of the Msembe study area was surveyed for the third time in 1989. Although tree density had dropped between the 1976 and 1982 surveys, there was no significant change between 1982 and 1989, probably because most bull éléphants had been killed by poachers. The change in the baobab size distribution between 1976 and 1989 is similar to that predicted by a model simulating the effects of elephant browsing on baobabs. It suggests that elephant browsing has a different effect on baobab numbers compared with browsing on other tree populations in the same study area.RésuméLa population de baobabs de la zone d'étude de Msembe fut étudiée pour la troisième fois en 1989. Bien que la densité de arbres ait chuté entre les études de 1976 et de 1982, on n'a pas constaté de changement significatif entre 1982 et 1989, probablement parce que la plupart des éléphants mâles avaient été tuéus par des braconniers.Le changement dans la distribution des tailles des baobabs entre 1976 et 1989 est similaire à celui prédit par un modèle simulant les effets des éléphants se nourrissant sur les baobabs. Ceci suggère que le nourrissage des éléphants a un effet différent sur le nombre de baobabs que sur d'autres populations d'arbres dans la même zone d'étude.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.