Colocasia esculenta (L.) Schott (Araceae), an expanding invasive species of aquatic ecosystems in the Iberian Peninsula: new records and risk assessment

espanolColocasia esculenta (L.) Schott, Araceae, se esta convirtiendo en una especie invasora en Espana (Peninsula Iberica). En este estudio se da cuenta de cuatro nuevas localidades invadidas, para las que se describen el estado de las poblaciones, las caracteristicas del habitat invadido y los rasgos climaticos de las localidades invadidas en Espana. La especie ha colonizado algunas localidades del Sur de Portugal. Se revisa su distribucion mundial y los parametros climaticos de las areas invadidas a fin de caracterizar su tolerancia climatica. El conjunto de datos muestra que la especie tiene amplia capacidad para colonizar ecosistemas acuaticos de agua bajo un amplio rango de condiciones climaticas. Finalmente, empleando como contraste dos metodos diferentes, se realiza un analisis del riesgo de invasion a dos escalas, Peninsula Iberica y Europa. En ambos casos los resultados alertan del alto riesgo ecologico asociado a la especie. Se hace una llamada a la precaucion sobre su uso fuera de su rango nativo, y se propone que la especie deberia ser considerada como invasora y de riesgo para los humedales europeos e ibericos, y por ello, legalmente prohibida en Europa. EnglishColocasia esculenta (L.) Schott, Araceae, is becoming an invasive plant in Spain (Iberian Peninsula). Four newly invaded localities are presented in this study, and its population status, habitat and climatic features in Spain are presented. The species has colonised some localities in south Portugal. To characterise the species’ climatic tolerance, its world distribution was reviewed, and the climate types of other invaded areas worldwide were identified. Global data show that the species has the potential to colonise aquatic ecosystems under a wide variety of climate types. Finally, based on two different procedures, risk assessments were conducted for the Iberian Peninsula and for continental Europe. Both suggested a high ecological risk associated with this species. Caution is called for in terms of its use outside of its native distribution range. It is proposed that this species should be considered as invasive and risky to European and Iberian water bodies and should be legally banned in Europe.

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