一般影响
根据Rivers (2002)，大萍(Pistia stratiotes)出现的地方，会对环境和经济造成严重的影响。此植物密接的植丛形成密集的毯垫，导致大多数水莴苣面临到问题。这些毯状植被会阻塞水道产生不利的经济效应，因而增加防洪工作的困难并且阻碍航行。大萍(Pistia stratiotes)毯垫还会破坏自然生态系统。它们会覆盖水面导致氧气浓度降低，也会覆盖底部阻断水-气界面和根呼吸。大萍(Pistia stratiotes)极厚的毯状植被会阻止阳光到达底层水。此植物这些负面特性累积的后果，使被入侵的栖息地丧失生物多样性。大萍(Pistia stratiotes)毯状植被还可以作为一个蚊子滋生的地方。
地点特有的影响：Puerto Rico 
改变水文: The dense mats created by connected rosettes of P. stratiotes lead to the majority of problems encountered with this species. These mats increase the difficulty of navigation and hinder flood control efforts (Rivers, 2002).
竞争: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
经济 /民生: Mats of P. stratiotes can have a negative economic effect by blocking waterways, thus hindering boat navigation and flood control efforts (Rivers, 2002). Arizona (United States (USA))
改变水文: The dense mats created by connected rosettes of P. stratiotes lead to the majority of problems encountered with this species. These mats increase the difficulty of navigation and hinder flood control efforts (Rivers, 2002).
竞争: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
经济 /民生: Mats of P. stratiotes can have a negative economic effect by blocking waterways, thus hindering boat navigation and flood control efforts (Rivers, 2002). California (United States (USA))
改变水文: The dense mats created by connected rosettes of P. stratiotes lead to the majority of problems encountered with this species. These mats increase the difficulty of navigation and hinder flood control efforts (Rivers, 2002).
竞争: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
经济 /民生: Mats of P. stratiotes can have a negative economic effect by blocking waterways, thus hindering boat navigation and flood control efforts (Rivers, 2002). Delaware (United States (USA))
改变水文: The dense mats created by connected rosettes of P. stratiotes lead to the majority of problems encountered with this species. These mats increase the difficulty of navigation and hinder flood control efforts (Rivers, 2002).
竞争: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
经济 /民生: Mats of P. stratiotes can have a negative economic effect by blocking waterways, thus hindering boat navigation and flood control efforts (Rivers, 2002). Florida (USA) (United States (USA))
改变水文: The dense mats created by connected rosettes of P. stratiotes lead to the majority of problems encountered with this species. These mats increase the difficulty of navigation and hinder flood control efforts (Rivers, 2002).
竞争: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
经济 /民生: Mats of P. stratiotes can have a negative economic effect by blocking waterways, thus hindering boat navigation and flood control efforts (Rivers, 2002). Georgia (USA) (United States (USA))
改变水文: The dense mats created by connected rosettes of P. stratiotes lead to the majority of problems encountered with this species. These mats increase the difficulty of navigation and hinder flood control efforts (Rivers, 2002).
竞争: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
经济 /民生: Mats of P. stratiotes can have a negative economic effect by blocking waterways, thus hindering boat navigation and flood control efforts (Rivers, 2002). Hawaii (United States (USA))
改变水文: The dense mats created by connected rosettes of P. stratiotes lead to the majority of problems encountered with this species. These mats increase the difficulty of navigation and hinder flood control efforts (Rivers, 2002).
竞争: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
经济 /民生: Mats of P. stratiotes can have a negative economic effect by blocking waterways, thus hindering boat navigation and flood control efforts (Rivers, 2002). Louisiana (United States (USA))
改变水文: The dense mats created by connected rosettes of P. stratiotes lead to the majority of problems encountered with this species. These mats increase the difficulty of navigation and hinder flood control efforts (Rivers, 2002).
竞争: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
经济 /民生: Mats of P. stratiotes can have a negative economic effect by blocking waterways, thus hindering boat navigation and flood control efforts (Rivers, 2002). Maryland (USA) (United States (USA))
改变水文: The dense mats created by connected rosettes of P. stratiotes lead to the majority of problems encountered with this species. These mats increase the difficulty of navigation and hinder flood control efforts (Rivers, 2002).
竞争: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
经济 /民生: Mats of P. stratiotes can have a negative economic effect by blocking waterways, thus hindering boat navigation and flood control efforts (Rivers, 2002). Mississippi (United States (USA))
改变水文: The dense mats created by connected rosettes of P. stratiotes lead to the majority of problems encountered with this species. These mats increase the difficulty of navigation and hinder flood control efforts (Rivers, 2002).
竞争: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
经济 /民生: Mats of P. stratiotes can have a negative economic effect by blocking waterways, thus hindering boat navigation and flood control efforts (Rivers, 2002). New Jersey (United States (USA))
改变水文: The dense mats created by connected rosettes of P. stratiotes lead to the majority of problems encountered with this species. These mats increase the difficulty of navigation and hinder flood control efforts (Rivers, 2002).
竞争: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
经济 /民生: Mats of P. stratiotes can have a negative economic effect by blocking waterways, thus hindering boat navigation and flood control efforts (Rivers, 2002). New York (United States (USA))
改变水文: The dense mats created by connected rosettes of P. stratiotes lead to the majority of problems encountered with this species. These mats increase the difficulty of navigation and hinder flood control efforts (Rivers, 2002).
竞争: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
经济 /民生: Mats of P. stratiotes can have a negative economic effect by blocking waterways, thus hindering boat navigation and flood control efforts (Rivers, 2002). North Carolina (United States (USA))
改变水文: The dense mats created by connected rosettes of P. stratiotes lead to the majority of problems encountered with this species. These mats increase the difficulty of navigation and hinder flood control efforts (Rivers, 2002).
竞争: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
经济 /民生: Mats of P. stratiotes can have a negative economic effect by blocking waterways, thus hindering boat navigation and flood control efforts (Rivers, 2002). South Carolina (United States (USA))
改变水文: The dense mats created by connected rosettes of P. stratiotes lead to the majority of problems encountered with this species. These mats increase the difficulty of navigation and hinder flood control efforts (Rivers, 2002).
竞争: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
经济 /民生: Mats of P. stratiotes can have a negative economic effect by blocking waterways, thus hindering boat navigation and flood control efforts (Rivers, 2002). Texas (United States (USA))
改变水文: The dense mats created by connected rosettes of P. stratiotes lead to the majority of problems encountered with this species. These mats increase the difficulty of navigation and hinder flood control efforts (Rivers, 2002).
竞争: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
经济 /民生: Mats of P. stratiotes can have a negative economic effect by blocking waterways, thus hindering boat navigation and flood control efforts (Rivers, 2002). Virgin Islands, USA
改变水文: The dense mats created by connected rosettes of P. stratiotes lead to the majority of problems encountered with this species. These mats increase the difficulty of navigation and hinder flood control efforts (Rivers, 2002).
竞争: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
经济 /民生: Mats of P. stratiotes can have a negative economic effect by blocking waterways, thus hindering boat navigation and flood control efforts (Rivers, 2002).
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