一般影響
希爾等人(2001)報告說：此藤可以爬上森林最高的樹木，形成一個高密度，遮光冠層，把所有的植被抑制在它下面。葡萄葉鐵線蓮(Clematis vitalba)大量蔓生後，它的葉和莖的重量會壓垮樹木，使原本健康的森林，被葡萄葉鐵線蓮蓋住殘留的樹樁和樹幹“。但是的奧格爾等人(2000)觀察到的葡萄葉鐵線蓮會爬到樹冠，但無法爬上直徑較大的樹，除非直徑較小的樹木和灌木提供墊腳石。他們的研究結果(泰哈皮研究保留區，紐西蘭)報告說：被葡萄葉鐵線蓮感染後，很多種的樹木和灌木已大為減少。奧格爾等表示，這不僅失去是一個單一的冠層樹種，25%左右的林下樹木和灌木樹種已經遺失。
地點特有的影響：New Zealand 
棲地改變: Hill et al (2001) report that, "Vines can climb the tallest forest trees, forming a dense, light-absorbing canopy that suppresses all vegetation beneath it. C. vitalba can be so vigorous that the weight of foliage and stems breaks the supporting trees, reducing once-healthy forest to a low, long-lived thicket of vines scrambling over stumps and logs". However Ogle et al (2000) observe that the vines ascend to the canopy of forest but are unable to climb large diameter emergent trees unless shrubs and smaller trees provide a series of ‘stepping stones’ to the crown of tall trees. Their study findings (study area Taihape reserve , New Zealand) indicate that the numbers and variety of understorey trees and shrubs that have been severely reduced following the infestation of C. vitalba correlates with observations of the growth habit of C. vitalba. Ogle et al showed e.g. that not a single canopy tree species had been lost from the Taihape Reserves though 25% or so of the understorey trees and shrubs species had been lost. Poland
競爭: Several species that do not tolerate shade are reportedly affected. The scale of impact of this species is moderate Washington (United States (USA))
棲地改變: The Washington State Noxious Weed Control Board (2003) states that, "On Orcas Island in San Juan County, the impacts of C. vitalba are visible and spreading as this species climbs over the forested areas."
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