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   Gymnocoronis spilanthoides (水生植物) English   
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         一般影响

    裸冠菊(Gymnocoronis spilanthoides)生长速度非常快,其浮垫会速覆盖水体,排挤掉其它植物和动物。因为侵袭会堵塞排水渠道导致洪水更加严重。休闲活动,灌溉,航运也可能受到影响。如果大量裸冠菊(Gymnocoronis spilanthoides)在水中腐烂,水质可能会下降。研究人员还报告说:裸冠菊(Gymnocoronis spilanthoides)构成湿地生态系统健康的重大威胁。它可以迅速取代湿地,削弱其环境价值,自然景观和休闲的潜力。这也很难控制,因为它可以用种子和无性繁殖两种方式传播。即使是小件植被也可以带来新的植群。因为它是主要生长在水中,除草剂对非目标植物和动物可能的影响也必须认真加以管理(环境和遗产部, 2003)。耕地保护(2004)报告说:裸冠菊(Gymnocoronis spilanthoides)会入侵自然湿地,使栖地退化,与生长较慢的原生植物竞争,影响湿地鸟类和其它依靠湿地的动物。



         地点特有的影响:
    New Zealand English 
    改变水文: In New Zealand it has caused flooding by blocking streams and drainage channels (Department of the Environment and Heritage, 2003).
    “It may also impede the flow of water and interfere with water utilisation including navigation and recreational activities” (Waikato Regional Council, 2005).

    滋扰人类: By modifying habitats and smothering other useful species, G. spilanthoides may displace traditional food sources of value to Maori (Waikato Regional Council, 2005).

    降低本地生物多样性: It has the ability to exclude submerged native flora species (Waikato Regional Council, 2005).



ISSG Landcare Research NBII IUCN University of Auckland