This table provides metadata for the actual indicator available from Iceland statistics closest to the corresponding global SDG indicator. Please note that even when the global SDG indicator is fully available from Icelandic statistics, this table should be consulted for information on national methodology and other Icelandic-specific metadata information.
| Indicator available |
Red List Index |
|---|---|
| Geographical coverage |
Iceland |
| Unit of measurement |
Index |
| Definitions |
The Icelandic Institute for Natural History compiles Red Lists for the biota of Iceland. The IINH has published Red Lists for vascular plants, birds, and mammals. |
| Calculations |
The Red List Index is calculated at a point in time by first multiplying the number of species in each Red List Category by a weight (ranging from 1 for ‘Near Threatened’ to 5 for ‘Extinct’ and ‘Extinct in the Wild’) and summing these values. This is then divided by a maximum threat score which is the total number of species multiplied by the weight assigned to the ‘Extinct’ category. This final value is subtracted from 1 to give the Red List Index value. Mathematically this calculation is expressed as - RLIt = 1 – [(Ss Wc(t,s) / (WEX * N)], where Wc(t,s) is the weight for category (c) at time (t) for species (s) (the weight for ‘Critically Endangered’ = 4, ‘Endangered’ = 3, ‘Vulnerable’ = 2, ‘Near Threatened’ = 1, ‘Least Concern’ = 0. ‘Critically Endangered’ species tagged as ‘Possibly Extinct’ or ‘Possibly Extinct in the Wild’ are assigned a weight of 5); WEX = 5, the weight assigned to ‘Extinct’ or ‘Extinct in the Wild’ species; and N is the total number of assessed species, excluding those assessed as Data Deficient in the current time period, and those considered to be ‘Extinct’ in the year the set of species was first assessed. |
| Comments and limitations |
Data follows the UN specification for this indicator. This indicator has been identified in collaboration with topic experts. |