Ecological and Socio-Economic Impacts of Chromolaena odorata and Mesosphaerum suaveolens, Two Invasive Alien Species in Central and Southern Benin, West Africa

Authors: Aikpon G* and Ganglo JC

DOI: 10.23880/jenr-16000419

Volume 10, Issue 1

Abstract

Chromolaena odorata and Mesosphaerum suaveolens, two invasive plants originating from tropical America, exert significant pressure on forest ecosystems in West Africa, particularly by disrupting natural regeneration processes. Their expansion in the Lama Classified Forest in southern Benin has raised increasing ecological and socio-economic concerns. This study investigated how C. odorata affects natural regeneration dynamics and examined local perceptions related to both species. Vegetation surveys were conducted in plots situated in invaded and non-invaded zones to assess species composition and seedling density. Complementary interviews with local communities were carried out to document the socio-economic impacts attributed to these invasive plants. Results show a marked decline in seedling abundance and species richness in invaded areas compared to non-invaded zones, indicating strong ecological pressure linked to the presence of the species. Community perceptions consistently highlight the predominantly harmful effects of C. odorata and M. suaveolens on agriculture, forest regeneration, and livelihoods. The study highlights the significant ecological and socio-economic threats posed by these invasive species and emphasizes the need for targeted management to protect ecosystem integrity in affected areas.

Keywords: Chromolaena odorata; Lama Classified Forest; Invasive Plant; M suaveolens; Natural Regeneration

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