|Scientific Name:||Hydrocharis morsus-ranae|
Hydrocharis asarifolia Gray
Hydrocharis asiatica Miq
Hydrocharis batrachyodegma St.Lag.
Hydrocharis cellulosa Buch-Ham
There are no significant taxonomic issues associated with this name.
|Red List Category & Criteria:||Least Concern ver 3.1|
|Contributor(s):||Rhazi, L. & de Belair, G.|
This species is classed as Least Concern as it is widespread and, despite local declines, it has overall stable populations and does not face any major threats.
H. morsus-ranae occurs from Algeria, through Europe north to Scandinavia and east through the Altai, the Caucasus and the Middle East to Siberia and Kazakhstan. It has apparently been introduced to parts of Canada and the eastern United States.
Native:Albania; Algeria; Austria; Belarus; Belgium; Bosnia and Herzegovina; Bulgaria; Croatia; Czech Republic; Denmark; Estonia; Finland; France (France (mainland)); Georgia (Abkhaziya, Adzhariya, Gruziya); Germany; Greece (Greece (mainland)); Hungary; Ireland; Kazakhstan; Latvia; Liechtenstein; Lithuania; Luxembourg; Macedonia, the former Yugoslav Republic of; Moldova; Montenegro; Morocco; Netherlands; Norway; Palestinian Territory, Occupied; Poland; Portugal (Portugal (mainland)); Romania; Russian Federation (Central European Russia, East European Russia, Irkutsk, Kaliningrad, Krasnodar, North European Russia, Northwest European Russia, South European Russia, West Siberia); Serbia (Serbia); Slovakia; Slovenia; Spain (Spain (mainland)); Sweden; Switzerland; Turkey (Turkey-in-Asia, Turkey-in-Europe); Ukraine (Ukraine (main part)); United Kingdom
Regionally extinct:Italy (Italy (mainland))
Introduced:Canada (Ontario, Québec); United States (Georgia - Native, New York)
|Upper elevation limit (metres):||500|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||H. morsus-ranae is classed as Critically Endangered in Spain, Endangered in Switzerland and Norway and Vulnerable in the United Kingdom. Otherwise, it is fairly widespread and abundant throughout its range.|
|Current Population Trend:||Stable|
|Habitat and Ecology:||H. morsus-ranae typically occurs in shallow, calcareous, mesotrophic or meso-eutrophic water in the sheltered bays of lakes or in ponds, canals and ditches.|
|Use and Trade:||There is some trade in H. morsus-ranae for landscape and garden ponds, but this appears to be insufficient to adversely affect the status of wild populations.|
There are no known past, ongoing or future threats to this species.
|Conservation Actions:||H. morsus-ranae is classed as Critically Endangered in Spain and the Czech Republic, Endangered in Switzerland and Norway and Vulnerable in the United Kingdom. In France, it is protected at regional level in Alsace, Midi-Pyrénées, Provence-Alpes-Côte d'Azur, Rhône-Alpes and Limousin. Otherwise, there are no conservation measures in place or needed.|
|Citation:||Lansdown, R.V. 2014. Hydrocharis morsus-ranae. The IUCN Red List of Threatened Species 2014: e.T164128A42387003. http://dx.doi.org/10.2305/IUCN.UK.2014-1.RLTS.T164128A42387003.en . Downloaded on 07 October 2015.|
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