Étude de cas sur les impacts
Rarotonga Is. (Cook Islands)
Modification de régime des feux: It produces large amounts of flammable material, increasing fire risk (PIER, 2002)
Altération d'habitat: On dunelands it can impact shorebird nesting sites and threaten plant habitat. Pampas is found on the fringes of geothermal areas. Fragile ecosystems can be damaged by invasion of pampas due to change of habitat. (McGlone MSc thesis, 2003)
Économique/Subsistance: On plantation lands it can compete with planted seedlings, hinder access and provide a fire risk. This can have an implication on silvicultural costs. Seed clinging to kiwifruit rejected for export (Knowles and Tombleson, 1987)
Modification de l'écosystème: Pampas has been listed as a wetland weed and a threat to the forest mire and forest-ecotone associations. It is reported to have the potential to invade scrub and forest margins and saline wetland habitats. C. selloana is known to affect the structure, species composition or regeneration of several sites with high conservation value. It has the potential to dominate sites and limit natural regeneration. This is especially so on islands and dunelands. It can disrupt vulnerable ecosystems and replace native vegetation especially on islands, island sea cliffs and dunelands.
Nuisance pour les personnes: Encroachment onto walking and mountain biking tracks (McGlone Msc thesis, 2003).
Perturbation physique: It can hinder access especially on stream margins and invade surrounding vegetation.
United States (USA)
Modification de régime des feux: Cortaderia selloana can form dense colonies that can become, or increase, fire hazards.
Modification des modes de succession: Cortaderia selloana can form dense stands that exclude other plants.
Nuisance pour les personnes: Cortaderia selloana's sharp leaves cut skin and can limit recreational use of areas.
Hawaii (United States (USA))
Altération d'habitat: In Hawaii Cortaderia selloana can invade a variety of environments from wet to dry climates and from disturbed to native environments.