一般影响
水王孙(Hydrilla verticillata)竞逐原生植物，藉由生长在水面，密集的毯垫，完全隔绝阳光，进而严重降低水生动植物的生物多样性。水王孙(Hydrilla verticillata)大型植群可能会影响鱼类的大小和族群层次，掠夺性鱼类不能有效地在厚垫内猎食。茂密的毯垫也影响休闲活动。除了干扰渔船，小艇发动机会被缠住，游泳区会被阻塞。水王孙(Hydrilla verticillata)往往减缓或堵塞河流，灌溉沟渠，运河和防洪渠道，造成积水利于蚊子繁殖。密集植群甚至造成洪水泛滥，改变水质减少氧含量，增加pH值和水温。
地点特有的影响：Africa 
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity. Australia
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity. Europe
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity. India
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity. Korea, Democratic People's Republic of
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity. Korea, Republic of
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity. New Zealand
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity. South America
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity. Connecticut (United States (USA))
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity.
经济 /民生: Overabundant Hydrilla makes it difficult for fish to find their prey, causing a decline in valuable sport fisheries. Recreational areas lose visitors and their associated monetary spending when Hydrilla clogs boat motors and entangles swimmers. Alabama (United States (USA))
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity.
经济 /民生: Overabundant Hydrilla makes it difficult for fish to find their prey, causing a decline in valuable sport fisheries. Recreational areas lose visitors and their associated monetary spending when Hydrilla clogs boat motors and entangles swimmers. Arizona (United States (USA))
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity.
经济 /民生: Overabundant Hydrilla makes it difficult for fish to find their prey, causing a decline in valuable sport fisheries. Recreational areas lose visitors and their associated monetary spending when Hydrilla clogs boat motors and entangles swimmers. California (United States (USA))
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity.
经济 /民生: Overabundant Hydrilla makes it difficult for fish to find their prey, causing a decline in valuable sport fisheries. Recreational areas lose visitors and their associated monetary spending when Hydrilla clogs boat motors and entangles swimmers. Delaware (United States (USA))
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity.
经济 /民生: Overabundant Hydrilla makes it difficult for fish to find their prey, causing a decline in valuable sport fisheries. Recreational areas lose visitors and their associated monetary spending when Hydrilla clogs boat motors and entangles swimmers. Florida (USA) (United States (USA))
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity.
经济 /民生: Overabundant Hydrilla makes it difficult for fish to find their prey, causing a decline in valuable sport fisheries. Recreational areas lose visitors and their associated monetary spending when Hydrilla clogs boat motors and entangles swimmers. Georgia (USA) (United States (USA))
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity.
经济 /民生: Overabundant Hydrilla makes it difficult for fish to find their prey, causing a decline in valuable sport fisheries. Recreational areas lose visitors and their associated monetary spending when Hydrilla clogs boat motors and entangles swimmers. Louisiana (United States (USA))
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity.
经济 /民生: Overabundant Hydrilla makes it difficult for fish to find their prey, causing a decline in valuable sport fisheries. Recreational areas lose visitors and their associated monetary spending when Hydrilla clogs boat motors and entangles swimmers. Maryland (USA) (United States (USA))
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity.
经济 /民生: Overabundant Hydrilla makes it difficult for fish to find their prey, causing a decline in valuable sport fisheries. Recreational areas lose visitors and their associated monetary spending when Hydrilla clogs boat motors and entangles swimmers. Mississippi (United States (USA))
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity.
经济 /民生: Overabundant Hydrilla makes it difficult for fish to find their prey, causing a decline in valuable sport fisheries. Recreational areas lose visitors and their associated monetary spending when Hydrilla clogs boat motors and entangles swimmers. North Carolina (United States (USA))
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity.
经济 /民生: Overabundant Hydrilla makes it difficult for fish to find their prey, causing a decline in valuable sport fisheries. Recreational areas lose visitors and their associated monetary spending when Hydrilla clogs boat motors and entangles swimmers. Pennsylvania (United States (USA))
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity.
经济 /民生: Overabundant Hydrilla makes it difficult for fish to find their prey, causing a decline in valuable sport fisheries. Recreational areas lose visitors and their associated monetary spending when Hydrilla clogs boat motors and entangles swimmers. South Carolina (United States (USA))
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity.
经济 /民生: Overabundant Hydrilla makes it difficult for fish to find their prey, causing a decline in valuable sport fisheries. Recreational areas lose visitors and their associated monetary spending when Hydrilla clogs boat motors and entangles swimmers. Tennessee (United States (USA))
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity.
经济 /民生: Overabundant Hydrilla makes it difficult for fish to find their prey, causing a decline in valuable sport fisheries. Recreational areas lose visitors and their associated monetary spending when Hydrilla clogs boat motors and entangles swimmers. Texas (United States (USA))
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity.
经济 /民生: Overabundant Hydrilla makes it difficult for fish to find their prey, causing a decline in valuable sport fisheries. Recreational areas lose visitors and their associated monetary spending when Hydrilla clogs boat motors and entangles swimmers. Virginia (United States (USA))
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity.
经济 /民生: Overabundant Hydrilla makes it difficult for fish to find their prey, causing a decline in valuable sport fisheries. Recreational areas lose visitors and their associated monetary spending when Hydrilla clogs boat motors and entangles swimmers. Washington (United States (USA))
滋扰人类: Hydrilla makes recreational activities difficult by entangling boat motors and choking swimming areas.
竞争: Hydrilla grows tall and dense and displaces other aquatic life thereby reducing biodiversity.
经济 /民生: Overabundant Hydrilla makes it difficult for fish to find their prey, causing a decline in valuable sport fisheries. Recreational areas lose visitors and their associated monetary spending when Hydrilla clogs boat motors and entangles swimmers.
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