IUCN Species Survival Commission (SSC), Invasive Species Specialist Group

Como resposta a estas questões, foi desenvolvida uma classificação padronizada dos táxones exóticos, baseada na magnitude dos seus impactos ambientais. EICAT (Classificação do Impacto Ambiental de Táxones Exóticos) o trata-se de um método simples, objetivo e transparente para classificar táxones exóticos de acordo com a magnitude dos seus impactos prejudiciais para o ambiente nas áreas recetoras. Com base na evidência dos impactos causados nos táxones nativos nas áreas em que foram introduzidos, os táxones exóticos são classificados em uma de cinco categorias de impacto.

Se ha elaborado una clasificación unificada de los taxones exóticos basada en la magnitud de su impacto ambiental (de aquí en adelante, la Clasificación del impacto ambiental de taxones exóticos, abreviada como EICAT por sus siglas en inglés) en respuesta a estas cuestiones. Se trata de un método sencillo, objetivo y transparente para clasificar taxones exóticos en cuanto a la magnitud de su impacto ambiental perjudicial en las zonas receptoras.

More than 70% of the earth is covered by oceans and major seas and there are more than 1.6 million kilometres of coastline. Yet our marine world is under threat: the most insidious is the one posed by marine invasive species. This booklet does not present new or primary information, but rather a synthesis of current issues and trends, including several examples of some of the worst marine invasive species, their spread and impact. It is targeted at the general public to highlight an important but often overlooked issue, and to serve as a source of information and inspiration.

This report presents the results of a broad assessment of freshwater diversity in the Douro river basin in Spain and Portugal. The Douro river basin is the largest of the Iberian Peninsula, and an ecological region of great value due to the high diversity of ecosystems and the number of species. A total of 14 sites, either identified as Key Biodiversity Areas (KBAs) or potential KBA sites, were surveyed for fish and macroinvertebrate species. More than 120 species were detected, with more than 10 species listed as threatened with extinction on the IUCN Red List of Threatened SpeciesTM.

A unified classification of alien taxa based on the magnitude of their environmental impacts has been developed in response to these issues. EICAT (Environmental Impact Classification for Alien Taxa) is a simple, objective and transparent method for classifying alien taxa in terms of the magnitude of their detrimental environmental impacts in recipient areas. Based on evidence on the impacts they have been causing on native taxa in their introduced range, alien taxa are classified into one of five impact categories.

Las ‘especies invasoras’ (a menudo llamadas plagas, malas hierbas o enfermedades) son plantas, animales, agentes patógenos y otros organismos que han sido transportados por los humanos más allá de los límites de su rango nativo de distribución (ya sea deliberada o involuntariamente) y que se vuelven destructivos para el medio ambiente y los medios de subsistencia humanos. Las islas y su área costera marina son particularmente vulnerables a las especies invasoras - debido a que a menudo constituyen ecosistemas únicos, con numerosas especies de plantas y animales endémicas (es

Les 'espèces envahissantes' (souvent appelées ravageurs, mauvaises herbes ou même maladies) sont des plantes, des animaux, des agents pathogènes et d’autres organismes qui sont délibérément ou involontairement emmenés au-delà de leur aire de répartition naturelle par des personnes et qui deviennent destructeurs de l’environnement ou des moyens de subsistance.

‘Invasive species’ (often called pests, weeds and diseases) are plants, animals, disease agents and other organisms taken beyond their natural range by people, deliberately or unintentionally, and which become destructive to the environment or human livelihoods. Islands are particularly vulnerable to invasive species, owing to the evolution of their native animals and plants in isolation from predators and diseases, and the dependence of island peoples on imports, travel and tourism, which lead to high rates of arrival of new pests.