Polygonum cuspidatum Sieb. & Zucc. (=Fallopia japonica (Houtt. Dcne.) (草本植物, 灌木)

生態 分佈 管理 影響 參考資料 聯繫

一般影響 虎杖對河岸地和開闊地是一大威脅，會快速生長形成密集群落，排擠原生植群，使其難以復原。這會降低物種多樣性，並改變野生物的棲地。一旦建立穩定族群，便難以移除。          地點特有的影響： France   改變水文: F. japonica contributes to the erosion of riverbanks and causes blockages to rivers in autumn when dry stems are carried by the current. 改變演化模式: F. japonica disturbs the natural regeneration of alluvial forests (alders, willows, ashes). 與其他入侵物種相互作用: The hybrid Fallopia X bohemica is common in France, produced by crosses of Fallopia japonica and F. sachalinensis. 農業: Blockages in rivers caused by F. japonica impacts on irrigation to fields. United States (USA)   其他: Its early emergence and great height combine to shade out other vegetation and prohibit regeneration of other species (Sukopp and Sukopp 1988, in Seiger, 1991). Thus, it reduces species diversity and damages wildlife habitat (Palmer 1990, Scott and Mars 1984, Wiegman pers. comm., in Seiger, 1991). 改變演化模式: It is a dominant pioneer in the primary succession of volcanic slopes and is frequently a coloniser in secondary succession (Hirose, 1984, in Seiger, 1991). 改變營養機制: Seiger (1991) states that it contributes to the development of the ecosystem, in part, by acting as a nutrient reservoir. 競爭: Remaley (1997) states that it spreads quickly to form dense thickets that exclude native vegetation and greatly alter natural ecosystems.