Structure, carbon sequestration potential and anthropogenic pressure on tree species in Porto-Novo's green spaces (Benin)

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Godonou Étienne Romaric Adéwalé
https://orcid.org/0009-0003-1427-5179
Yevide Sedami Igor Armand
https://orcid.org/0000-0002-9913-9939
Gbesso Gbodja Houéhanou François
https://orcid.org/0000-0002-8686-1746
Gbaguidi Ahonankpon Hubert Frédéric
https://orcid.org/0009-0008-2064-2701
Lougbegnon Olou Toussaint
https://orcid.org/0000-0003-4116-7993

Résumé

This study assesses the carbon sequestration capacity of urban green spaces in Porto-Novo, Benin, and examines the anthropogenic pressures impacting tree species diversity. A comprehensive inventory of 1,340 trees across 39 selected green spaces revealed a dominance of trees in social and educational institutions (35%), followed by public green spaces (19%). Tree diameter analysis showed a significant variation, with an average diameter ranging from 34.11 cm (street trees) to 79.28 cm (cemeteries), indicating the presence of both young and mature trees. The total aboveground biomass (AGB) was estimated at 2,270.42 Mg, corresponding to 1,299.53 Mg of sequestered carbon. Social and educational institutions contributed the most to carbon storage (484.60 Mg, 37%), followed by public green spaces (236.57 Mg, 18%) and landscaped natural areas (179.82 Mg, 14%). However, anthropogenic pressures severely affect tree health, with 154 cases (53.8%) of bark stripping, mainly on Terminalia superba, Terminalia mantaly, and Khaya senegalensis. Pruning (75 cases) and pollarding (44 cases) also impact tree growth and structure. These findings emphasize the need for sustainable urban planning that integrates biodiversity conservation and effective management strategies to enhance carbon sequestration and urban resilience.

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Comment citer
Étienne Romaric Adéwalé, G., Sedami Igor Armand, Y., Gbodja Houéhanou François, G., Ahonankpon Hubert Frédéric, G., & Olou Toussaint, L. (2025). Structure, carbon sequestration potential and anthropogenic pressure on tree species in Porto-Novo’s green spaces (Benin). Revue Ecosystèmes Et Paysages, 5(1). https://doi.org/10.59384/recopays.tg.v5i1.138
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