| Abstract: | Abstract. In order to stress successes in restoration and conservation of species, regionally, nationally or globally, a new instrument has been developed, the ‘Blue Lists’, ‘registers of those Red List species that show a durable overall stabilization or increase of abundance in the region (nation, world) considered’. ‘Blue Data Books’ include additional information on the ecology, conservation, and promotion of the species. For describing the overall change of abundance of every individual species six categories are defined. Furthermore, the effects of nature conservation techniques (NCT) on a species are evaluated using six additional categories. In a test area of 3 431 km2 in northern Switzerland, information was compiled on the change in abundance of the 708 Red List species of higher plants (spermatophyta) over the last 10-15 yr. Overall, 33% of these species showed a stabilization or even increase in abundance; these are Blue List species; ca.20% showed a decline and for almost 50% the change in abundance is not known. NCTs have been successfully applied to more than 50 % of all the species, at least locally. For about a further 30%, the required NCTs are known but have not yet been tried out. If these techniques were applied on a large scale, the decline of very many species in the test area could be stopped. |
