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Distribution patterns of fire regime in the Pendjari Biosphere Reserve, west Africa

Journal of Arid Land 2023年第10期15卷 1160-1173页

作者： Omobayo G ZOFFOUN Chabi A M S DJAGOUN EtotépéA SOGBOHOSSOU Laboratory of Applied Ecology(LEA) Faculty of Agronomic SciencesUniversity of Abomey-Calavi(UAC)Cotonou 01 BP 526Benin GeoEnvironmemt and Biodiversity Conservation(GeoEBC)NGO Cotonou 02 BP 775Benin Department of Environment Senghor University1 Place Ahmed OrabiA1 Mancheya BP 415Alexandria 21111Egypt

Pendjari Biosphere Reserve(PBR),a primary component of the W-Arly-Pendjari transboundary biosphere reserve,represents the largest intact wild ecosystem and pristine biodiversity spot in west *** savannah ecosystem has long been affected by fire,which is the main ecological driver for the annual rhythm of life in the *** the fire distribution patterns will help to improve its management plan in the *** study explores the fire regime in the PRB during 2001–2021 in terms of burned area,seasonality,fire frequency,and mean fire return interval(MFRI)by analysing moderate resolution imaging spectroradiometer(MODIS)burned area *** indicated that the fire season in the PBR extends from October to May with a peak in early dry season(November–December).The last two fire seasons(2019–2020 and 2020–2021)recorded the highest areas burned in the PBR out of the twenty fire seasons *** the twenty years period,8.2%of the reserve burned every 10–11 months and 11.5%burned *** largest part of the reserve burned every one to two years(63.1%),while 8.3%burned every two to four years,5.8%burned every four to ten years,and 1.9%burned every ten to twenty *** 1.3%of the entire area did not fire during the whole study *** returned to a particular site every 1.39 a and the annual percentage of area burned in the PBR was 71.9%.The MFRI(MFRIsavannah,tree savannah,woodland savannah,and rock *** regime must be maintained to preserve the integrity of the *** this context,we suggest applying early fire in tree and woodland savannahs to lower grass height,and late dry season fires every two to three years in shrub savannah to limit the expansion of shrubs and *** propose a laissez-faire system in areas in woodland savannah where the fire frequency is sufficient to allow tree *** findings highlight the utility of remote sensing in defining the geographical and

关键词： fire season fire frequency west african savannah moderate resolution imaging spectroradiometer(MODIS) burned area

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