General Impact
P. tarminiana can rapidly reach and smother the forest canopy when the sub-canopy vegetation is disturbed either naturally, by hurricanes and other high winds, or by man or feral pigs (Smith, 1985 in PIER, 2003). P. tarminiana suppresses tree regeneration, topples shallow-rooted trees, kills standing trees through shading, and lowers species richness (Binggeli, 1997).
Location Specific Impacts:New Zealand Competition: Grows over and smothers native trees, suppressing forest growth. Marlborough Region (New Zealand) Competition: Grows over and smothers native trees, suppressing forest growth. Hawaii (United States (USA)) Competition: Grows over and smothers native trees, suppressing forest growth. Interaction with other invasive species: The prolific amounts of fruit produced enables greater population densities of feral pigs to exist.
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