Bioeconomic Sustainability and Resilience of Savanna

I Yatat-Djeumen, Luc Doyen (), J Tewa and B Ghosh
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I Yatat-Djeumen: University of Yaoundé 1 = Université de Yaoundé I
J Tewa: UMMISCO - Unité de modélisation mathématique et informatique des systèmes complexes [Bondy] - UGB - Université Gaston Berger de Saint-Louis Sénégal - UY1 - Université de Yaoundé I - Institut de la francophonie pour l'informatique - UCA - Université Cadi Ayyad [Marrakech] - SU - Sorbonne Université - IRD [Ile-de-France] - Institut de Recherche pour le Développement - UCAD - Université Cheikh Anta Diop de Dakar [Sénégal]
B Ghosh: University of Calcutta

CEE-M Working Papers from CEE-M, Universtiy of Montpellier, CNRS, INRA, Montpellier SupAgro

Abstract: Our paper investigates the bioeconomic sustainability and resilience of savanna social-ecological systems (SES). A stylized dynamics of an exploited grass-tree systems is thus considered accounting both for the competition between trees and grass along with logging and grass harvesting activities. Regarding sustainability, we rely on bioeconomic viability goals including consumption security for grass, profitability of logging and coexistence of tree-grass states. A first analytical result relates to the elicitation of sufficient sustainability conditions through the non-emptyness of the so-called viability kernel. Such sufficient conditions rely on coupled MSY (maximum sustainable yield)-MEY (maximum economic yield) reference states-controls. A larger viable set including these MSY-MEY equilibria is also identified. The resilience of such viability states-controls for savanna SES facing shocks such as fire is then put forward from both recovery through stability analysis and resistance viewpoints. Simulations inspired from savanna systems in Cameroon exemplify the analytical findings.

Keywords: Savanna; Tree; Grass; Bioeconomics; Cutting; Harvesting; Dynamic model; Control; Viability; Stability; Recovery; Resistance; Cameroon (search for similar items in EconPapers)
Date: 2024-01-12
Note: View the original document on HAL open archive server: https://hal.inrae.fr/hal-04391328v1
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Working Paper: Bioeconomic Sustainability and Resilience of Savanna (2024)
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