一般影響
米氏野牡丹形成的緻密單種立地，以其大型葉壓迫原生植物，使位居下層地被之原生種生長及更新受抑制。在大溪地島，它覆蓋超過 70% 的島。在大溪地(社會群島)有約40-50種稀有本土植物因而直接受到威脅。其脆弱的根系易容受土壤沖蝕、地滑之害。
地點特有的影響：French Polynesia 
競爭: M. calvescens can outcompete the native vegetation of these islands and has displaced over 65% of the native forest in Tahiti since its introduction in 1937 (Meyer and Florence 1996). Tahiti Is. (French Polynesia)
威脅瀕危物種: Up to 50 of the 107 endemic plants of Tahiti are directly threatened with extinction by miconia (Meyer and Florence 1996). On Tahiti, endemic species of the genus Psychotria (Rubiaceae) show a significant decrease in the production of flowers and seeds with increased density of miconia (Meyer et al. 2003) and regeneration of the IUCN Red List Critically Endangered Myrsine longifolia is weaker in understories that have been heavily invaded by miconia (Meyer 2007).
生態系統變化: Ecosytems have become completely transformed as M. calvescens gains dominance, due to its creation of deep shade which no native species can tolerate (Meyer 1996). Big Island (United States (USA))
農業: M. calvescens threatens industry and agriculture because it causes soil erosion with possibility of landslides. Soil erosion causes approximately 3% to 31% decreases in the yield depending on the type of crops (Chan-Halbrendt et al. 2007).
降低本地生物多樣性: M. calvescens reduces biodiverstiy in Hawaii by displacing and excluding native plants and altering forest ecosytems (Chan-Halbrendt et al. 2007) Kaua`i Is. (United States (USA))
農業: M. calvescens threatens industry and agriculture because it causes soil erosion with possibility of landslides. Soil erosion causes approximately 3% to 31% decreases in the yield depending on the type of crops (Chan-Halbrendt et al. 2007).
降低本地生物多樣性: M. calvescens reduces biodiverstiy in Hawaii by displacing and excluding native plants and altering forest ecosytems (Chan-Halbrendt et al. 2007) Maui Is. (United States (USA))
農業: M. calvescens threatens industry and agriculture because it causes soil erosion with possibility of landslides. Soil erosion causes approximately 3% to 31% decreases in the yield depending on the type of crops (Chan-Halbrendt et al. 2007).
降低本地生物多樣性: M. calvescens reduces biodiverstiy in Hawaii by displacing and excluding native plants and altering forest ecosytems (Chan-Halbrendt et al. 2007) Oahu Is. (United States (USA))
農業: M. calvescens threatens industry and agriculture because it causes soil erosion with possibility of landslides. Soil erosion causes approximately 3% to 31% decreases in the yield depending on the type of crops (Chan-Halbrendt et al. 2007).
降低本地生物多樣性: M. calvescens reduces biodiverstiy in Hawaii by displacing and excluding native plants and altering forest ecosytems (Chan-Halbrendt et al. 2007)
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