Short-Term Changes in the Structure of Ant Assemblages in a Guinean Savanna under Differing Fire Regimes at Lamto Scientific Reserve, Côte d'Ivoire - Sorbonne Université Access content directly
Journal Articles Journal of Tropical Ecology Year : 2018

Short-Term Changes in the Structure of Ant Assemblages in a Guinean Savanna under Differing Fire Regimes at Lamto Scientific Reserve, Côte d'Ivoire

Abstract

Abstract: To maintain savanna vegetation, mid-seasonal fire has been applied since 1961 in the Lamto Savanna (Côte d'Ivoire). However, this prescribed fire has not impeded tree encroachment during recent years, nor have its effects on insect assemblages been documented. Also the impact of tree intrusion on insect assemblages is poorly studied in savanna. To prevent tree density increasing, a change in fire regime might be a solution. In this study, we examined the effect of different fire regimes (early, mid-seasonal and late fires) on leaf-litter ant assemblages in order to suggest appropriate measures for preventing tree invasion without having an effect on insect communities. Sampling was implemented by combining pitfall trapping and leaf-litter sampling before and after three different fire regimes, early, mid-seasonal and late fires. While the ant species richness declined after the passage of early and mid-seasonal fires, significantly more species were found in the burnt savanna after the late fire. However, the losses or gains of species due to different fire regimes did not cause severe changes in the ant species composition. Of the functional groups identified, only the generalists and specialist predators were respectively strongly affected by the early and mid-seasonal fires, certainly due to micro-habitat modification. Based on the trends observed in the present study, we suggest sampling other invertebrate fauna in similar savanna plots to find out if other insect groups have similar reactions to the applied fire regimes.
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Dates and versions

hal-03992043 , version 1 (16-02-2023)

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Mouhamadou Kone, Kanvaly Dosso, Christine Dakele Yode, Akissi Evelyne Kouakou, Aya Brigitte N'Dri, et al.. Short-Term Changes in the Structure of Ant Assemblages in a Guinean Savanna under Differing Fire Regimes at Lamto Scientific Reserve, Côte d'Ivoire. Journal of Tropical Ecology, 2018, 34 (5), pp.326--335. ⟨10.1017/S0266467418000305⟩. ⟨hal-03992043⟩
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