Identification of potential invasive alien species in Spain through horizon scanning

Carrete, Martina
Castro-Díez, Pilar
Delibes-Mateos, Miguel
Jaques, Josep A.
López-Darias, Marta
Nogales, Manuel
Pino, Joan
Ros, Macarena
Traveset, Anna
Altamirano, María
Álvarez, Inés
Arias, Andrés
Cabido, Carlos
Cacabelos, Eva
Cobo, Fernando
Cruz, Joaquín
Cuesta, José A.
Dáder, Beatriz
Estal, Pedro del
Gallardo, Belinda
Gómez Laporta, Miguel
González-Moreno, Pablo
Hernández, José Carlos
Jiménez-Alfaro, Borja
Lázaro Lobo, Adrián
Leza, Mar
Montserrat, Marta
Oliva Paterna, Francisco J.
Piñeiro, Laura
Ponce, Carlos
Rotchés Ribalta, Roser
Sánchez, Marta
Trillo, Alejandro
Viñuela, Elisa
Invasive alien species have widespread impacts on native biodiversity and ecosystem services. Since the number of introductions worldwide is continuously rising, it is essential to prevent the entry, establishment and spread of new alien species through a systematic examination of future potential threats. Applying a three-step horizon scanning consensus method, we evaluated non-established alien species that could potentially arrive, establish and cause major ecological impact in Spain within the next 10 years. Overall, we identified 47 species with a very high risk (e.g. Oreochromis niloticus, Popillia japonica, Hemidactylus frenatus, Crassula helmsii or Halophila stipulacea), 61 with high risk, 93 with moderate risk, and 732 species with low risk. Many of the species categorized as very high or high risk to Spanish biodiversity are either already present in Europe and neighbouring countries or have a long invasive history elsewhere. This study provides an updated list of potential invasive alien species useful for prioritizing efforts and resources against their introduction. Compared to previous horizon scanning exercises in Spain, the current study screens potential invaders from a wider range of terrestrial, freshwater, and marine organisms, and can serve as a basis for more comprehensive risk analyses to improve management and increase the efficiency of the early warning and rapid response framework for invasive alien species. We also stress the usefulness of measuring agreement and consistency as two different properties of the reliability of expert scores, in order to more easily elaborate consensus ranked lists of potential invasive alien species ​
This document is licensed under a Creative Commons:Attribution - Non commercial - No Derivate Works (by-nc-nd) Creative Commons by-nc-nd4.0