Effect of floods on the distribution of meadow birds on Ljubljansko barje
I investigated the densiry of meadow birds breeding on Ljubljansko barje as a function of three different flooding regimes. The densities of Common Quail Coturnix coturnix, Corn Crake Crex crex, Northern Lapwing Vanellus vanellus, Sky Lark Alauda arvensis, Tree Pipit Anthus trivialis, Whinchat Saxic...
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| Format: | Other/Unknown Material |
| Language: | English |
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Društvo za opazovanje in proučevanje ptic Slovenije
2015
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| Online Access: | https://repozitorij.uni-lj.si/IzpisGradiva.php?id=63079 https://repozitorij.uni-lj.si/Dokument.php?id=63090&dn= http://www.cobiss.si/scripts/cobiss?command=DISPLAY&base=cobib&rid=15635161&fmt=11 |
| Summary: | I investigated the densiry of meadow birds breeding on Ljubljansko barje as a function of three different flooding regimes. The densities of Common Quail Coturnix coturnix, Corn Crake Crex crex, Northern Lapwing Vanellus vanellus, Sky Lark Alauda arvensis, Tree Pipit Anthus trivialis, Whinchat Saxicola rubetra, Marsh Warbler Acrocephalus palustris, Common Whitethroat Sylvia communis and Corn Bunting Miliaria calandra were significantly higher on regularly flooded than on non-flooded areas. A similar effect was not observedon a Common Stonechat Saxicola torquata population. I discuss some reasons for the positive effect of floods on breeding density. Preservation, or even expansion, of areas with extensive agriculture and regular floods is strongly recommend as an essential conservation measure for meadow birds on Ljubljansko barje. Na Ljubljanskem barju sem raziskoval gostoto travniških gnezdilcev na treh območjih, ki se med seboj razlikujejo glede na režim poplavljanja. Ugotovil sem, da so gostote prepelice Coturnix coturnix, kosca Crex crex, pribe Vanellus vanellus, poljskega škrjanca Alauda arvensis, drevesne cipe Anthus trivialis, repaljščice Saxicola rubetra, močvirske trstnice Acrocephalus palustris, rjave penice Sylvia communis in velikega strnada. Miliaria calandraznačilno večje na vsakoletno poplavljenih površinah kot na površinah, kjer poplav ni ali pa so zelo redke. Gnezditvena gostota prosnika Saxicola torquata ni bila odvisna od poplavnega režima. Predstavljam nekaj vzrokov za tako ugoden vpliv poplav na ptice. Kot nujen naravovarstveni ukrep za ohranitev nacionalno pomembnih populacij travniških ptie na barju predlagam ohranitev ali celo razširitev poplavnih površin in ekstenzivnega kmetovanja. |
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