Standish, R.J.; Robertson, AW.; & Williams, P.A. 2001. The impact of an invasive weed Tradescantia fluminensis on native forest regeneration. Journal of Applied Ecology 38: 1253-1263.
A major effect of Tradescantia in forest is the suppression of seedlings. Data from two Manawatu/Horowhenua forest remnants showed that Tradescantia biomass reaches a maximum at edges and under canopy gaps. In these areas, Tradescantia biomass becomes so thick that very little light penetrates to the soil and almost all woody seedlings are suppressed. In shadier spots, the Tradescantia is not as thick, more light reaches the forest floor and more shade tolerant seedlings like kohekohe establish. These results suggest that imposing shade by establishing a subcanopy through planting may allow the natural regeneration cycle to be partly restored.
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