Grasshoppers and bushcrickets regionally extinct in the Czech Republic: consequence of the disappearance of habitats scattered on the edge of their ranges

摘要: According to the International Union for Conservation of Nature, taxa extinct within a region but extant in other parts world should be classified as Regionally Extinct (RE). A taxon is designated RE when there no reasonable doubt that last individual capable reproduction has died or disappeared. can also if it previously longer visited particular region. The species Arcyptera fusca, Arcyptera microptera, Celes variabilis, Gampsocleis glabra, Locusta migratoria, Oedaleus decorus, and Stenobothrus rubicundulus had been found only small number localities Czech Republic. We studied Republic where they reported their occurences not recently confirmed; specimens were observed 1940, 1960, 1970s. All these occurred at representing borderline areas such sub-Mediterranean mountainous (Carpathian) species. therefore offered optimal conditions insects, suitable biotopes scattered isolated from each other. In most cases, disappeared due change management (either natural artificial forestation). Although certain are excellent flyers (especially O. decorus), known recent separated by hundreds kilometers. Based on our failure find after extensive attempts, we conclude discussed considered regionally These particularly vulnerable vegetation structures. loss indicate urgency assessing status co-occuring taxa.