一般影響
根據Rivers(2002)，大萍(Pistia stratiotes)出現的地方，會對環境和經濟造成嚴重的影響。此植物密接的植叢形成密集的毯墊，導致大多數水萵苣面臨到問題。這些毯狀植被會阻塞水道產生不利的經濟效應，因而增加防洪工作的困難並且阻礙航行。大萍(Pistia stratiotes)毯墊還會破壞自然生態系統。它們會覆蓋水面導致氧氣濃度降低，也會覆蓋底部阻斷水-氣界面和根呼吸。大萍(Pistia stratiotes)極厚的毯狀植被會阻止陽光到達底層水。此植物這些負面特性累積的後果，使被入侵的棲息地喪失生物多樣性。大萍(Pistia stratiotes)毯狀植被還可以作為一個蚊子滋生的地方。
地點特有的影響：Puerto Rico 
改變水文: 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).
競爭: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
經濟 /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))
改變水文: 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).
競爭: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
經濟 /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))
改變水文: 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).
競爭: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
經濟 /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))
改變水文: 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).
競爭: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
經濟 /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))
改變水文: 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).
競爭: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
經濟 /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))
改變水文: 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).
競爭: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
經濟 /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))
改變水文: 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).
競爭: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
經濟 /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))
改變水文: 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).
競爭: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
經濟 /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))
改變水文: 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).
競爭: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
經濟 /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))
改變水文: 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).
競爭: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
經濟 /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))
改變水文: 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).
競爭: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
經濟 /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))
改變水文: 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).
競爭: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
經濟 /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))
改變水文: 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).
競爭: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
經濟 /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))
改變水文: 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).
競爭: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
經濟 /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))
改變水文: 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).
競爭: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
經濟 /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
改變水文: 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).
競爭: Extremely thick mats of P. stratiotes can prevent sunlight from reaching underlying water and aquatic plants (Rivers, 2002).
經濟 /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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