General Impact
This species is a major invader of native forests in Hawaii (Carr, University of Hawaii), New Zealand, and La Réunion (PIER, 2002). In New Zealand yellow ginger ( H. flavescens) exhibits dense rhizomal growth which aids its spread and dispersal and prevents the growth of native plants. There is concern that it may permanently displace uncommon plants or specialised plant communities in this country (NZ DOC).
Location Specific Impacts:New Zealand 
Competition: Produces massive branching rhizomes. These underground stems produce new buds and form a dense layer up to a metre thick, which other plants cannot penetrate.
Physical disturbance: Above ground wild ginger blocks the light and smothers native species. Auckland Region (New Zealand)
Competition: Produces massive branching rhizomes. These underground stems produce new buds and form a dense layer up to a metre thick, which other plants cannot penetrate.
Physical disturbance: Above ground wild ginger blocks the light and smothers native species. Bay of Plenty Region (New Zealand)
Competition: Forms dense colonies in native forests, smothering young native plants as well as preventing native seedling establishment. This leads to the alteration of both the function and structure of native forest and in some instances results in the total death of the forest. Northland Region (New Zealand)
Competition: Produces massive branching rhizomes. These underground stems produce new buds and form a dense layer up to a metre thick, which other plants cannot penetrate.
Physical disturbance: Above ground wild ginger blocks the light and smothers native species. Coromandel Peninsula (New Zealand)
Competition: Produces massive branching rhizomes. These underground stems produce new buds and form a dense layer up to a metre thick, which other plants cannot penetrate.
Physical disturbance: Above ground wild ginger blocks the light and smothers native species.
|
