IUCN Red List category

The International Union for Conservation of Nature and Natural Resources (IUCN) is an international organisation for the conservation for natural values, whose main task is to encourage and promote the conservation of biodiversity and the sustainable use of nature's resources and the maintenance of ecosystems.

IUCN founded the Red List of Threatened Species in 1964, which has since become the most comprehensive global inventory of the conservation status of animal, plant, and fungi species.

Categories of the IUCN Red List:

EX – Extinct

EW – Extinct in the Wild

CR – Critically Endangered

EN – Endangered

VU – Vulnerable

NT – Near Threatened

LC – Least Concern

DD – Data Deficient

NE – Not Evaluated

 

Hungarian Red List category

Categorisation of the species based on Király (2007).

Categories and their description:

EX – Extinct. A taxon is extinct if its last individual is definitely dead (all its previous habitats have been physically destroyed); or no specimens have been detected in the last 50 years during thorough and systematic research covering all its known habitats and additional presumed habitats.

EW – Extinct in the wild. A taxon is extinct in the wild if it occurs exclusively in cultivation or it only has introduced population(s) far from its original range; and no specimens have been detected in the last 50 years during thorough and systematic research covering all its known habitats and additional presumed habitats.

CR – Critically endangered. A taxon is critically endangered if it is particularly threatened by the risk of extinction in its natural environment.

EN – Endangered. A taxon is endangered if it is most likely to be threatened by the risk of extinction in its natural environment.

VU – Vulnerable. A taxon is vulnerable if it is threatened by a lower risk of extinction in its natural environment.

NT – Near threatened. A taxon is near threatened if it does not currently fall into any of the above categories, but, based on the current situation, it is likely to meet at least the criteria for the vulnerable category in the near future.

DD – Data deficient. A taxon is data deficient if no direct or indirect data are available on the current distribution or status of their populations, therefore the degree of vulnerability cannot be determined. Taxa that are not sufficiently studied in Hungary but certainly do not fall into the above vulnerability categories were not categorised as data deficient. In other words, taxa considered as data deficient are probably threatened by extinction, but the degree of vulnerability cannot be determined due to taxonomic uncertainties or to the lack of data on their localities.

 

Data source and citation:

Király G. (ed.) (2007): Vörös Lista. A magyarországi edényes flóra veszélyeztetett fajai. [Red list of the vascular flora of Hungary]. Sopron, 73 pp.

Sonkoly, J., Tóth, E., Balogh, N., Balogh, L., Bartha, D. ... Török, P. (2022) PADAPT 1.0 – the Pannonian Database of Plant Traits. bioRxiv, doi: https://doi.org/10.1101/2022.12.05.519136