Invasive in North America, Iris pseudacorus is commonly considered a freshwater species; however, I. pseudacorus can tolerate some saltwater, and is observed in brackish coastal habitats such as estuaries and marshes. Despite this tolerance, saltwater depresses I. pseudacorus reproduction, growth, survival, and dispersal ability. This raises the question of whether I. pseudacorus can spread through a marine environment and establish away from sources of freshwater. This study reports the observation of 104 established juvenile I. pseudacorus individuals in coastal habitat on two islands in southern British Columbia, Canada. Two islands that are devoid of aboveground freshwater sources such as streams, rivers, or lakes that connect to marine habitats. Individuals were also observed growing in a novel substrate, shell hash (fragments of bivalve and gastropod shells that accumulate in areas of low hydrological energy). To the best of our knowledge, this is the first confirmed case of I. pseudacorus growing in a high salinity (30 PSU) shell hash environment. Despite the need for more study, this observation suggests that a broader range of coastal habitat may be susceptible for invasion by I. pseudacorus than previously thought.

鸢尾鸢尾在北美受到入侵，通常被认为是一种淡水物种。但是，Pseudacorus I.能够耐受一些盐水，并且在河口和沼泽等咸淡的沿海栖息地中观察到。尽管有这种耐受性，但是盐水抑制了假单胞菌的繁殖，生长，存活和扩散能力。这就提出了假单胞菌是否可以在海洋环境中传播并远离淡水源的问题。这项研究报告了对104个已建立的少年假单胞菌的观察个人在加拿大不列颠哥伦比亚省南部两个岛屿的沿海栖息地。缺少与陆地相连的溪流，河流或湖泊等地上淡水资源的两个岛屿。还观察到个体在新的底物壳杂物（在低水文能量区域中积累的双壳类和腹足纲动物的壳碎片）中生长。据我们所知，这是在高盐度（30 PSU）壳哈希环境中生长的假单胞菌的第一个确诊病例。尽管需要进行更多的研究，但这一观察结果表明，比以前想象的更广泛的沿海生境可能受到假单胞菌的侵袭。