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Effects of Broussonetia papyrifera invasion and land use on vegetation characteristics in a tropical forest of Ghana

  • David M. Adigbli
  • Alexander K. Anning
  • James K. Adomako
  • Benedicta Y. Fosu-Mensah
Original Paper
  • 22 Downloads

Abstract

The purpose of this study was to evaluate the effects of Broussonetia papyrifera (paper mulberry) invasion and land use on the floristic composition of a dry semi-deciduous forest in Ghana. Forty-five plots (25 m × 25 m each), distributed among three land uses—selectively logged (SL); abandoned farmlands (AF); and an undisturbed reference (RF)—were surveyed. Results showed lower tree species richness (S), diversity (H′), evenness (S) and basal area (BA) in the SL (46, 0.78, 0.32 and 269.12 m2 ha−1, respectively) and AF (40, 0.53, 0.45, and 131.16 m2 ha−1) sites compared to the RF site (79, 2.66, 0.87, 963.72 m2 ha−1). Similar patterns were found at the shrub layer, but no differences were observed at the herb layer. Non-metric multidimensional scaling ordination revealed distinct species composition among the land uses. The two disturbed habitats, SL and AF, were associated with increased B. papyrifera invasion particularly in the overstory, with importance value index and mean relative density of 45 and 65.03%, and 42 and 53.29%, correspondingly. However, the species was only sparsely represented in the RF site. Tree density of B. papyrifera correlated negatively with H′, S, E, BA, and native tree density and richness. These findings highlight the strong link between human land use (i.e., logging and slash-and-burn farming), invasion, and vegetation characteristics, and suggest the need to limit these disturbances to conserve biodiversity within tropical forest ecosystems.

Keywords

Afram Headwaters Forest Reserve Broussonetia papyrifera Forest community characteristics Human-caused disturbances Plant invasion 

Notes

Acknowledgements

We are grateful to the Forestry Commission of Ghana for access to the site. We also thank the staff of the Institute for Environment and Sanitation Studies of the University of Ghana, and the Department of Theoretical and Applied Biology, KNUST, for their support. Finally, we thank Mr. John Yaw Amponsah for helping with the identification of plant species.

Supplementary material

11676_2018_691_MOESM1_ESM.docx (50 kb)
Supplementary material 1 (DOCX 49 kb)

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Copyright information

© Northeast Forestry University and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • David M. Adigbli
    • 1
  • Alexander K. Anning
    • 2
  • James K. Adomako
    • 3
  • Benedicta Y. Fosu-Mensah
    • 1
  1. 1.Institute for Environment and Sanitation StudiesUniversity of GhanaLegonGhana
  2. 2.Department of Theoretical and Applied BiologyKwame Nkrumah University of Science and TechnologyKumasiGhana
  3. 3.Department of BotanyUniversity of GhanaLegonGhana

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