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AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
| Species | Elodea canadensis [WoRMS] | |
| Authority | Michx. | |
| Family | Hydrocharitaceae | |
| Order | Alismatales | |
| Class | Magnoliopsida | |
| Phylum | Tracheophyta | |
| Synonym (?) | ||
| Sub-species level (?) | Not entered |
| Native origin (?) | Ocean: Atlantic --> Ocean region: NW Atlantic References: Paavola M, Olenin S, Leppäkoski E (2005) Are invasive species most successful in habitats of low native species richness across European brackish water seas? Estuarine, Coastal and Shelf Science 64(4), 738-750 References (not structured): Paavola M., A. Olenin, E. Leppakoski 2005. Are invasive species most successful in habitats of low native species richness across European brackish water seas? Estuarine, Coastal and Shelf Science, 64: 738-750. |
| Life form / Life stage (?) |
Comments: Elodea canadensis is a submerged, rather densely bushy, aquatic perennial. |
| Sociability / Life stage (?) |
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| Reproductive frequency (?) | Iteroparous |
| Reproductive type (?) | Sexual Comments: Elodea canadensis is dioecious. Pollination occurs near the water surface and pollin is distributed by wind and water currents. Vegetative reproduction by fragments is very common |
| Developmental trait (?) | Not entered |
| Characteristic feeding method / Life stage (?) |
References (not structured): Erhard, D., Gross, E. M. 2006. Allelopathic activity of Elodea canadensis and Elodea nuttallii against epiphytes and phytoplankton. Aquatic Botany, 85(3), pp. 203-211. |
| Mobility / Life stage (?) |
Comments: Young plants initially start with a seedling stem with roots growing in mud at the bottom of the water. |
| Salinity tolerance range (?) | Venice system: 1. Limnetic [<0.5psu] References: Weidema.I.R. (red.) (2000) Introduced Species in the Nordic Countries. Nord 2000:13. Nordic Council of Ministers, Copenhagen.Paavola M, Olenin S, Leppäkoski E (2005) Are invasive species most successful in habitats of low native species richness across European brackish water seas? Estuarine, Coastal and Shelf Science 64(4), 738-750 References: Paavola M, Olenin S, Leppäkoski E (2005) Are invasive species most successful in habitats of low native species richness across European brackish water seas? Estuarine, Coastal and Shelf Science 64 (2005) 738-750 Leppakoski E, Olenin S (2000) Non-native species and rates of spread: lessons from the brackish Baltic Sea. Biological Invasions, 2: 151-163. Weidema IR (2000) Introduced species in the nordic countries, Nord, 13 : 242pp. Comments: It may tolerate salinities up to approx. 2.5 per mile. |
| Habitat modifying ability potential (?) | OLD VALUE Comments: --/OLD VALUE/-- Bioconstructor Elodea canadensis is economically important as an ornamental species. It is sold in garden shops as “oxygen weed” for private ponds to improve water quality and pond scenery. It is also an important part of lake ecosystems in its native habitat of North America. It provides habitat for aquatic invertebrates, fish and amphibians and is a food source for waterfowl, beavers and muskrats. |
| Toxicity / Life stage (?) | Not relevant |
| Bioaccumulation association (?) | Anthropogenic chemical compounds References: Kähkönen, M. A., Pantsar-Kallio, M., Manninen, P. K. 1997. Analysing heavy metal concentrations in the different parts of Elodea canadensis and surface sediment with PCA in two boreal lakes in southern Finland. Chemosphere, 35(11), pp. 2645-2656. Comments: Elodea canadensis accumulates Fe and Cu in the roots and Ni, Mn and Cr in the leaves. |
| Known human health impact? | Known Comments: No known effects to the human health. |
| Known economic impact? | Known References: Bowmer, K. H., Jacobs, S. W. L., Sainty, G. R. 1995. Identification, biology and management of Elodea canadensis, Hydrocharitaceae. Journal of aquatic plant management, 33(1), pp. 13-19. Comments: During the last 20-30 years, E. canadensis has spread rapidly in the irrigation systems of south-eastern Australia. This threatened the efficiency of irrigated agriculture by impeding the flow of water in supply and drainage channels. |
| Known measurable environmental impact? | Known References: Mjelde, M., Lombardo, P., Berge, D., ohansen, S. W. 2012. Mass invasion of non-native Elodea canadensis Michx. in a large, clear-water, species-rich Norwegian lake–impact on macrophyte biodiversity. In Annales de Limnologie-International Journal of Limnology, 48( 2), pp. 225-240. Comments: E. canadensis may be the reason for the decrease of N. flexilis, likely through depletion of CO2 in the water column and reduced nutrients in sediments. |
| Included in the Target Species list? | No References: HELCOM, 2009. Alien Species and Ballast Water [PDF]. Available at: (https://archive.iwlearn.net/helcom.fi/stc/files/shipping/Table_2_Alienspecies_%20lists_2009.pdf) |
| Association with vessel vectors (?) | Anchor and anchor chains References: U.S. Fish and Wildlife Service, 2019. Ecological Risk Screening Summary: Elodea. Available at: https://www.fws.gov/sites/default/files/documents/Ecological-Risk-Screening-Summary-Elodea.pdf [Accessed 12 July 2024]. Comments: E. canadensis can be dispersed via ships as fragments attached to anchor chains or fenders. |
| Last update by | Sandra Gečaitė, 2024-07-12 |