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Biodiversity and Conservation

, Volume 26, Issue 14, pp 3307–3327 | Cite as

Plants in traditional home gardens: richness, composition, conservation and implications for native biodiversity in Benin

  • Rodrigue Castro Gbedomon
  • Valère Kolawolé Salako
  • Aristide Cossi Adomou
  • Romain Glèlè Kakaï
  • Achille Ephrem Assogbadjo
Original Paper
Part of the following topical collections:
  1. Ex-situ conservation

Abstract

Home gardens have received increasing attention and have been insistently presented as hotspots for agro-biodiversity over the last decades. However, apart from their exceptional high plant species diversity, there is little quantitative evidence of the effectiveness of plant species conservation in home gardens. This study examined this issue by assessing (i) the size and membership of garden flora and the contribution to the maintenance of the national flora, (ii) how home garden flora connects to the larger ecosystem it belongs to and (iii) the conservation status of plant species at the home garden level. 360 home gardens distributed in three agro-ecological zones and nine phyto-geographical districts in Benin were visited and inventoried. Diversity parameters at different taxonomic levels were calculated. Species accumulation and spatial occupancy, multivariate methods and rarity index were also used for data analysis. Findings showed that the 360 studied home gardens hosted up to 14.21% of plant species and 44.32% of plant families of the national flora. Home garden flora was constantly dominated by exotic plant species but strongly connected to their surrounding ecosystems, being composed of at least 60% of plant species from their phyto-geographical districts. Finally, home garden plant species were mostly rare and threatened at the home garden level. In this study, we acknowledge the contribution of home gardens to the maintenance of plant species diversity at regional and global levels than local level. Based on the observed prevalence of exotic species, HG effectiveness in sustainably conserving native plant species biodiversity remains questionable.

Keywords

Agro-biodiversity Flora Native species  Exotic species Conservation Benin 

Notes

Acknowledgements

This work was funded by the International Foundation for Science (IFS), Research Grant D/5827-1. We are extremely grateful to the senior researchers for their helpful suggestions. We would like also to thank the visiting household for their collaboration. Special thanks go to the technician of the National Herbarium for his assistance in the identification of vouchers.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

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Supplementary material 1 (DOCX 10 kb)
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Supplementary material 2 (TIFF 264 kb)
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Supplementary material 3 (TIFF 2148 kb)

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Copyright information

© Springer Science+Business Media B.V. 2017

Authors and Affiliations

  • Rodrigue Castro Gbedomon
    • 1
  • Valère Kolawolé Salako
    • 1
  • Aristide Cossi Adomou
    • 2
  • Romain Glèlè Kakaï
    • 1
  • Achille Ephrem Assogbadjo
    • 3
  1. 1.Laboratoire de Biomathématiques d’Estimations ForestièresUniversité d’Abomey-CalaviCotonouBenin
  2. 2.Département de Biologie végétale, Faculté des Sciences et TechniquesUniversité d’Abomey-CalaviCotonouBenin
  3. 3.Laboratoire d’Ecologie AppliquéeUniversité d’Abomey-CalaviCotonouBenin

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