| Research article |
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| Distribution patterns of fire regime in the Pendjari Biosphere Reserve, West Africa |
Omobayo G ZOFFOUN1,2,*( ), Chabi A M S DJAGOUN1, Etotépé A SOGBOHOSSOU1,3 |
1Laboratory of Applied Ecology (LEA), Faculty of Agronomic Sciences, University of Abomey-Calavi (UAC), Cotonou 01 BP 526, Benin
2GeoEnvironmemt and Biodiversity Conservation (GeoEBC) NGO, Cotonou 02 BP 775, Benin
3Department of Environment, Senghor University, 1 Place Ahmed Orabi, Al Mancheya BP 415, Alexandria 21111, Egypt |
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Abstract 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 Africa. This savannah ecosystem has long been affected by fire, which is the main ecological driver for the annual rhythm of life in the reserve. Understanding the fire distribution patterns will help to improve its management plan in the region. This 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 product. Results 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 studied. During the twenty years period, 8.2% of the reserve burned every 10-11 months and 11.5% burned annually. The 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 years. Only 1.3% of the entire area did not fire during the whole study period. Fire returned to a particular site every 1.39 a and the annual percentage of area burned in the PBR was 71.9%. The MFRI (MFRI<2.00 a) was low in grasslands, shrub savannah, tree savannah, woodland savannah, and rock vegetation. Fire regime must be maintained to preserve the integrity of the PBR. In 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 bushes. We propose a laissez-faire system in areas in woodland savannah where the fire frequency is sufficient to allow tree growth. Our findings highlight the utility of remote sensing in defining the geographical and temporal patterns of fire in the PBR and could help to manage this important fire prone area.
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Received: 25 May 2023
Published: 31 October 2023
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Corresponding Authors:
*Omobayo G ZOFFOUN (E-mail: ghislainholy@gmail.com)
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