|
Résumé :
|
A red list index (RLI) summarises overall trends in numbers of a specified group of birds. Based on four Danish red lists published since 1990, a red list index on trends in numbers of nationally threatened breeding birds is presented. Initially, the red lists from 1990 and 1997 were revised using current IUCN criteria and categories. It was found that there was a non-significant increase in RLI (i.e. a decrease in threat level) during the period 1990-2009, consisting of a significant increase from 1990 to 1997, a non-significant increase from 1997 to 2003, and a non-significant decrease from 2003 to 2009.
|