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- W4367626865 abstract "Introduction Over-grazing by livestock has resulted in the widespread degradation of South Africa’s succulent thicket ecosystems. This is characterised by a significant reduction in the cover of the dominant succulent shrub, Portulacaria afra . Because this species is unable to regenerate naturally in degraded habitat, active reintroduction is required to restore ecosystem function. However, reintroduction success is relatively low, and the recruitment barriers for this species are poorly understood. Methods By conducting pairwise plot surveys in actively restored and adjacent degraded succulent thicket habitats, the extent of P. afra seedling abundance in these contrasting ecosystem conditions is quantified. Results Seedling abundance was significantly greater in restored ecosystems ( W = 23, p = 0.03225). Additionally, seedlings found in restored habitats were strongly associated with open habitat, whereas seedlings in degraded ecosystems were more restricted to nurse sites (X 2 = 122.84, df = 2, p -value < 2.2e–16). A weak (R 2 = 0,237), but significant ( p = 0, 0295) correlation between P. afra cover and seedling abundance was recorded. Conclusion Active restoration of succulent thicket habitat through P. afra reintroduction appears to overcome recruitment barriers. This may suggest that, despite the poor survival of introduced individuals, natural recruitment could contribute to the regeneration of restored succulent thicket ecosystems." @default.
- W4367626865 created "2023-05-02" @default.
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- W4367626865 date "2023-05-01" @default.
- W4367626865 modified "2023-10-16" @default.
- W4367626865 title "Regeneration dynamics of <i>Portulacaria afra</i> in restored succulent thicket of South Africa" @default.
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- W4367626865 doi "https://doi.org/10.7717/peerj.15081" @default.
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