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   Elodea canadensis (水生植物) English   
生态 分布 管理 影响 参考数据 联系


         一般影响

    伊乐藻(Elodea canadensis)可能只需要三到四季就可以变成一个地方的主要杂草,这样繁茂可以保持到10年以上(罗德韦尔, 1998) 。在19世纪下半期和1990年代前半期,这个物种非常困扰欧洲各国,其迅速各地蔓延,造成主要的环境问题(CAB国际, 2005)。这水草对水生生态系统的运作,会有一个普遍的负面影响,并会排挤本土水生植物。此外,它可以阻碍水流,影响休闲活动(CAB国际, 2005)。这种植物对遮荫的反应是减少叶片,伸长节间,以凌驾直接的竞争者,让它的叶片得到更加有利的光照环境(Herault,Bornet & Tremolieres, 2008)。此物种的碎片有高的存活率,使它们能够长距离散播,因此增加其入侵能力(巴拉-塞格雷坦,埃尔杰,Sagnes等 2002)。这个物种的萃取物会降低几种水生初级生产者的生长,它们之间的附生藻类和蓝藻分离出不同的沉水植物(艾哈德 & 格罗斯, 2006)。



         地点特有的影响:
    Gulf of Bothnia (Baltic Sea) English 
    栖地改变

    竞争: Elodea canadensis has exhibited community dominance (Baltic Sea Alien Species Database, 2007).
    France English 
    竞争: The relatively aggressive vegetative growth of Elodea canadensis leads to enormous competition between shoots of the same species with the consequence that one habitat becomes fully occupied by one genotype (Thiebaut, 2005).
    Norway English 
    栖地改变: There is concern that the establishment of Elodea canadensis caused a minor change in the environment due to competition with other native species. The plant competes with and displaces indigenous vegetation, thus reducing biodiversity. The dense stands affect the entire lake ecosystem (Josefsson & Andersson, 2001). could cause a deterioration in water quality and habitats, causing a decline in crayfish populations (Hessen, Skurdal & Braathen, 2004).
    Lake Baikal (Russian Federation) English 
    其它: Elodea canadensis can accumulate and metabolize toxic substances, and is highly toxic-resistant (Kozhova & Izhboldina, 1993).

    竞争: Elodea canadensis has a high competitive quality since it can survive frozen in ice, and prefers waters with a low mineral content and high transparency (Kozhova & Izhboldina, 1993).
    Sweden English 
    其它: Elodea canadensis also causes problems for boat traffic, fishing, swimming, and other recreational uses of the lakes where it is present (Josefsson & Andersson, 2001).

    栖地改变: Elodea canadensis caused a major change in the habitat modification in the lakes of sweden (Josefsson & Andersson, 2001).

    竞争: Elodea canadensis caused a minor change in the environment due to competition with other native species. The plant competes with and displaces indigenous vegetation, thus reducing biodiversity. The dense stands affect the entire lake ecosystem (Josefsson & Andersson, 2001).

    经济 /民生: Elodea canadensis has caused minor economic and social effects in this area (Josefsson & Andersson, 2001).

    降低本地生物多样性: Elodea canadensis caused a minor change in the environment due to competition with other native species. The plant competes with and displaces indigenous vegetation, thus reducing biodiversity. The dense stands affect the entire lake ecosystem (Josefsson & Andersson, 2001).
    United Kingdom (UK) English 
    竞争: Although it is now regarded as a naturalised aquatic plant, Elodea canadensis caused a minor change in the environment due to competition with other native species. The plant competes with and displaces indigenous vegetation, thus reducing biodiversity. The dense stands affect the entire lake ecosystem (Josefsson & Andersson, 2001). causes problems by competing for nutrients and outgrowing many native species (CEH, 2004).
    Southern Wales (United Kingdom (UK)) English 
    经济 /民生: Large-scale harvesting of Elodea canadensis was necessitated in order to maintain water-based recreation (Wade, 1999).



ISSG Landcare Research NBII IUCN University of Auckland