Habitat preferences of riparian birds in Nature Park Žumberak - Samoborsko gorje

Potoci šuma viših nadmorskih visina značajna su područja velike raznolikosti i brojnosti vrsta. Istraživanja staništa od značaja su za razumijevanje rasprostranjenosti i brojnosti ptica duž vodotoka te zaštitu staništa i ptičjih vrsta. Na području Parka prirode Žumberak – Samoborsko gorje mnogo je takvih staništa. Cilj istraživanja bio je utvrditi rasprostranjenost i brojnost vodenkosa, gorske pastirice, bijele pastirice i male muharice te značajke staništa koje te vrste nastanjuju. Istraživanje ornitofaune provedeno je u travnju i svibnju 2018. i 2019. godine, a istraživanje staništa u lipnju 2019. godine. Na sedam potoka određeno je 70 točaka u kojima su evidentirane značajke staništa poput materijala, brzine toka, prisutnosti modifikacija, korištenje obala, strukture vegetacije, poprečni profil potoka, pH vrijednosti i nadmorske visine točaka. Zabilježene značajke staništa analizirane su standardiziranim selekcijskim indeksom. Najveću rasprostranjenost pokazuje gorska pastirica, rasprostranjena na svim istraživanim potocima. Vodenkos je zabilježen na dva istraživana potoka, bijela pastirica i mala muharica zabilježene su na jednom potoku. Nije uočena značajna preferencija neke značajke staništa za gorsku pastiricu i vodenkosa.Forest streams of higher altitude are significant areas of great diversity and species abundance. Research of habitats is important for understanding the distribution and abundance of birds along watercourses and conservation of habitat and bird species. Such habitats are numerous in the area of Nature Park Žumberak – Samoborsko gorje. The aim of research was to determine distribution and abundance of dipper, grey wagtail, white wagtail and red-breasted flycatcher and habitat features of these species. The survey of ornithofauna was conducted in April and May 2018 and 2019, and research of habitat was conducted in June 2019. Seventy points were determined on seven streams at which habitat features like material, flow-type, presence of modifications, land-use of banks, vegetation structure, transverse profiles, pH values and altitude of points. Recorded habitat features were analysed using a standardized selection index. The grey wagtail showed the highest distribution, and was widespread along all researched streams. The dipper was recorded on two researched streams, white wagtail and red-breasted flycatcher were recorded on one stream. No significant preference for any habitat features was recorded