一般影響
聚藻(Myriophyllum spicatum)長成茂密侵襲,遮蔭、取代了其他水生植物,它比被取代的原生植物,食品資源價值較小。高密度時會減少水生昆蟲,使魚類的食物資源減少。大型食肉魚類失去覓食空間,而且獲得獵物的效率也會降低。另一個影響是大毯狀植被腐爛後會減少水中氧含量。茂密的毯狀植被,干擾阻礙水分運輸移動與休閒活動,如游泳,划船,釣魚和滑水。
地點特有的影響:Canada 滋擾人類: Interferes with recreational activities such as swimming, boating, fishing and water skiing. 競爭: Shades out native aquatic plants that have higher value for fish and bird species 雜交: Hybridisation with native milfoils threatens to jeopardise biocontrol of the weed species and facilitate further displacement of native species United States (USA) 滋擾人類: Interferes with recreational activities such as swimming, boating, fishing and water skiing. 競爭: Shades out native aquatic plants that have higher value for fish and bird species 雜交: Hybridisation with native milfoils threatens to jeopardise biocontrol of the weed species and facilitate further displacement of native species
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