Concomitant effects of multiple disturbances (logging, fire, biological invasion) on native tree abundances into West Africa's semi-deciduous forests

Dago Marie Ruth, Zo-Bi Irie Casimir, Badouard Vincyane, Patacca Marco, Herault Bruno. 2023. Concomitant effects of multiple disturbances (logging, fire, biological invasion) on native tree abundances into West Africa's semi-deciduous forests. Biological Conservation, 285:110220, 10 p.

Résumé : West African semi-deciduous forests face multiple disturbances directly linked to human activities. A major unknown is the concomitant effects that these disturbances might have on forest communities. We (i) studied the long-term (>30 years) response of 17,038 trees from 207 semi-deciduous forest species to the three disturbances (fire, logging and biological invasion) in a 100-ha experimental set-up, (ii) examined the links between species-specific responses and functional traits related to resource acquisition and to defense strategies, and (iii) listed species vulnerable to local disturbances, in relation to their global vulnerabilities. Our results show that all three disturbances have long-lasting negative impacts on the current abundance of species. The most sensitive species to disturbance are those with a conservative resource strategy and which invest little in defensive strategies. We found that species that are locally vulnerable to fire are also globally highly threatened species. In the context of West Africa's almost extinct forests, we propose (i) the conservation of the last remaining deciduous forests in West Africa, knowing that opening them to logging simultaneously increases the risk of fire, (ii) the use of native species in reforestation programs to limit the risk of biological invasions, and (iii) the implementation of fire control strategies in conservation and forest restoration policies.

Mots-clés Agrovoc : incendie de forêt, espèce envahissante, exploitation forestière, reconstitution forestière, politique forestière, forêt primaire, forêt, conservation des ressources, incendie, forêt tropicale humide, lutte biologique, arbre forestier, ressource forestière

Mots-clés géographiques Agrovoc : Afrique occidentale, Afrique

Mots-clés libres : West Africa, Semi-deciduous forests, Logging, Fire, Invasion, Bayesian modeling

Classification Agris : K70 - Dégâts causés aux forêts et leur protection
K01 - Foresterie - Considérations générales
F40 - Écologie végétale

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Agences de financement européennes : European Commission

Agences de financement hors UE : Education and Research Ministry of Côte d'Ivoire, Fonds Français pour l'Environnement Mondial

Programme de financement européen : H2020

Projets sur financement : (CIV) ReVaTene, (CIV) Cocoa4Future, (CIV) Terri4Sol

Auteurs et affiliations

• Dago Marie Ruth, CIRAD-ES-UPR Forêts et sociétés (FRA)
• Zo-Bi Irie Casimir, INPHB (CIV)
• Badouard Vincyane, CIRAD-ES-UMR Ecofog (GUF)
• Patacca Marco, Wageningen University and Research Centre (NLD)
• Herault Bruno, CIRAD-ES-UPR Forêts et sociétés (CIV) ORCID: 0000-0002-6950-7286 - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/606179/)

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