Avtor/Urednik		Scneider-Jacoby, Martin
Naslov		Breeding distribution and ecology of the black stork Ciconia nigra in the Sava alluvial wetlands, Croatia
Prevedeni naslov		Gnezditvena razširjenost in ekologija črne štorklje Ciconia nigra v loki reke Save, Hrvaška
Tip		članek
Vir		Acrocephalus
Vol. in št.		Letnik 20, št. 97
Leto izdaje		1999
Obseg		str. 167-76
Jezik		eng
Abstrakt		During 1986-1988, a systematic ornithological study was carried out in the Sava wetlands in Croatia (Fig. l). The study area covers 1,766 km2 and supports a very high proportion of important biotopes; 612 km2 of floodplain, 522 km2 of autochthonous deciduous woodland (3/4 flooded), 119 km2 wet pastureland, 121 km2 hay meadows,16 km2 fish-ponds and 42 km2 of rivers (Tab. 1S. During the study, 469 observations of Black Storks were made and a total of 1,151 Black Storks seen. In 64% of the observations one stork was sighted, in 27% two individuals and on six occasions more than 30 birds were seen together (maximum 69): Most of the observations were conducted in April and May when the birds were making territorial flights over the riparian forests (Figs.2, 3). 81% of the sightings were made in the floodplain. 60% of the observations were made of birds either in or in flight over wooded areas, 16% in wet pastureland, 5% in meadowland, 4% on fish-ponds and 3% on the Sava's tributaries: Black storks were observed iri 44% of the 362 grid squares (2 x 2km, Figs. 4,6). Their distribution is diseussed. Nests were seen is 26 of the squares, and in 45 grid squares territories existed. The population amounts to at least 70 breeding pairs. The area holds about 1 % of the European population and is therefore of international importance.
Izvleček		V obdobju 1986-1988 je bila v savski loki na Hrvaškem opravljena sistematična ornitološka študija o gnezditveni razširjenosti in ekologiji črne štorklje. Območje raziskovanja obsega 1.766 km2 z mnogimi pomembnimi biotopi: 612 km2 poplavnih površin, 522 km2 avtohtonih trdolesnih lok (3/4 poplavljenih), 119 km2 mokrih pašnikov, 121 km2 košenih travnikov, 16 km2 ribnikov in 42 km2 rek (tab. 1). Med študijo je bilo zabeleženih 469 opazovanj, med katerimi je bilo naštetih skupaj 1.151 črnih štorkelj. V 64% opazovanj je bila opažena ena štorklja, v 27% dve in v šestih primerih več kot 30 osebkov hkrati (največ 69). Največ opazovanj je bilo zabeleženih aprila in maja, ko so bile ptice na teritorialnih preletih obrežnih gozdov (sl. 2, 3). 81% opazovanj je bilo zabeleženih na poplavnih površinah, 60% v gozdnatih predelih ali v letu nad njimi, 16% na mokrih pašnikih, 5% na traviščih, 4% na ribnikih in 3% na Savinih pritokih. Črne štorklje so bile opažene v 44% od skupno 362 kvadratov v prikazani mreži (2 x 2 km, sl. 4, 6). Avtor v članku razpravlja o njihovi razširjenosti. Gnezda so bila opažena v 26 kvadratih in 45 kvadratov je bilo teritorialnih. Populacija to živečih črnih štorkelj je ocenjena na najmanj 70 gnezdečih parov. To območje je zaradi dejstva, da v njem živi najmanj 1% evropske populacije, mednarodnega pomena.
Deskriptorji		BIRDS ECOLOGY POPULATION DENSITY CROATIA ANIMAL NUTRITION BEHAVIOR, ANIMAL