Avtor/Urednik		Trontelj, Peter
Naslov		Popis kosca Crex crex v Sloveniji v letih 1992-93
Prevedeni naslov		Census of the corn Crake Crex crex in Slovenia in 1992-93
Tip		članek
Vir		Acrocephalus
Vol. in št.		Letnik 16, št. 79
Leto izdaje		1995
Obseg		str. 174-80
Jezik		slo
Abstrakt		In 1992 and 1993, the first Corn Crake Crex crex census was carried out in Slovenia so far. Most of the potential sites were investigated. 464 singing males were counted, according to which the Slovene population of this bird can be estimated at about 510 males in the census period. The focal point of its distribution are the karts polje along the Ljubljanica river system and Ljubljansko barje (the Ljubljana Marshes), where 84% of all Corn Crakes were registered. In the lowlands of the eastern and northeastern parts of Slovenia, only isolated records were made apart from a small remaining population. With the exception of a few individuals, these birds were practically absent in the plains along some larger rivers. In the abandoned upland meadows above 700 m a.s.l. in the western Julian Alps and in the Snežnik mountains, it breeds dispersedly in small numbers, while its breeding at Kobariški Stol is quite dense. Most of the Corn Crakes (64%) were recorded in annually inundated and late in the season mown meadows and rough grassland. Unmown marshes and somewhat drier, extensively cultivated meadows represent the bird's next most important habitats, followed by abandoned upland meadows. Arable land, as the bird's possible biotope, are not significant. Most of the remaining areas inhabited by Corn Crakes are threatened by the increasing modernization and intensification of agriculture as well as by early mechanized mowing, together with the destruction of habitat (draining, transformation of meadows into fields). At places, especially in mountainous country, the Corn Crake is threatened due to the fact that the no longer mown grassland is becoming gradually overgrown with shrubs. None of the important areas has been legally protected, and the traditional meadow farming has not been given any state support.
Deskriptorji		BIRDS ECOSYSTEM POPULATION DENSITY