Abstract
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.
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All data is available upon reasonable request to Parks Canada.
References
Ackleh A, Zhang P (2009) Competitive exclusion in a discrete stage-structured two species model. Math Modell Natural Phenomen 4:156–175
Caplis M, Dreyer GD (2001) Living resources and habitats of the lower Connecticut. River. Connecticut College Arboretum. Bulletin Number: 37. 82pp
Cody WJ (1961) Iris pseudacorus L. escaped from cultivation in Canada. The Canadian Field Naturalist 75:139–142
DiTomaso JM, Kyser GB (2016) Shoreline drizzle applications for control of incipient patches of Yellowflag Iris (Iris pseudacorus). Invasive Plant Science and Management 9:205–213
Engİn A, Kandemİr N, Şenel G, Özkan M (1998) An autecological study on Iris pseudacorus L.(Iridaceae). Turkish Journal of Botany 22:335–340
Gaskin JF, Pokorny ML, Mangold JM (2016) An unusual case of seed dispersal in an invasive aquatic; yellow flag Iris (Iris pseudacorus). Biological Invasions 18:2067–2075
Gerwing TG, Davies MM, Clements JC, Flores A-M, Thomson HM, Nelson KR, Kushneryk K, Brourd-John E, Harvey B, Plate E (2020) Do you want to breach an embankment? Synthesis of the literature and practical recommendations for breaching of tidally influenced causeways and dikes. Estuarine Coastal and Shelf Science 245:107024
Gong L, Wong H, Kong X, Li G, Liu E, Xu C, Xu Y (2015) Iris Pseudoacorus biology habitat, cultivation technology and its application in environmental protection. International conference on education, management, commerce and society (EMCS-15). Atlantis Press
Jacobs J, Graves M, Mangold J (2010) Ecology and management of Yellowflag Iris (Iris pseudacorus L.). Invasive species technical note no. MT-28. United States Department of Agriculture, Natural Resources Conservation Service. 6pp
Kettenring KM, Adams CR (2011) Lessons learned from invasive plant control experiments: a systematic review and meta-analysis. Journal of Applied Ecology 48:970–979
Mopper S, Wiens KC, Goranova GA (2016) Competition, salinity, and clonal growth in native and introduced irises. American Journal of Botany 103:1575–1581
Mulqueen J, Gleeson T (1988) Association of the Yellow Flag Iris (Iris pseudacorus L.) with ground water seepage and its possible use as an indicator plant. Irish Journal of Agricultural Research:106–110
Pathikonda S, Ackleh AS, Hasenstein KH, Mopper S (2009) Invasion, disturbance, and competition: modeling the fate of coastal plant populations. Conservation Biology 23:164–173
Sutherland W (1990) Biological flora of the British Isles. Journal of Ecology 78:833–848
Sutherland W, Walton D (1990) The changes in morphology and demography of Iris pseudacorus L. at different heights on a saltmarsh. Functional Ecology 4:655–659
Tarasoff CS, Streichert K, Gardner W, Heise B, Church J, Pypker TG (2016) Assessing benthic barriers vs. aggressive cutting as effective yellow flag Iris (Iris pseudacorus) control mechanisms. Invasive Plant Science and Management 9:229–234
Weidlich EW, Flórido FG, Sorrini TB, Brancalion PH (2020) Controlling invasive plant species in ecological restoration: a global review. Journal of Applied Ecology 57:1806–1817
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Funding for this study was provided by Gulf Islands National Park Reserve (Parks Canada).
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TGG, HMT, EKB-J, KK, MMD, PL, and KRN contributed equally to the production of this manuscript.
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Gerwing, T.G., Thomson, H.M., Brouard-John, E.K. et al. Observed Dispersal of Invasive Yellow Flag Iris (Iris pseudacorus) through a Saline Marine Environment and Growth in a Novel Substrate, Shell Hash. Wetlands 41, 1 (2021). https://doi.org/10.1007/s13157-021-01421-w
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DOI: https://doi.org/10.1007/s13157-021-01421-w