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Istraživanje je provedeno kako bi se ustanovila i usporedila obilježja zajednica ptica u šumama Parkova prirode Medvednica i Žumberak – Samoborsko gorje. Istraživanje ornitofaune provedeno je metodom brojanja na točki, a u istraživanju obilježja vegetacije korištena je metoda kružnih ploha. Na temelju udjela temeljnica pojedinih stabala istraživane su točke razvrstane u pet tipova šuma: bukovu, hrastovu, crnogoričnu, miješanu bjelogoričnu i miješanu bjelogorično – crnogoričnu šumu. Na točkama Medvednice zabilježeno je 39, a na točkama Žumberačkog gorja 49 vrsta ptica. Ukupna gustoća populacije šumskih pjevica veća je na Medvednici, dok je raznolikost ornitofaune, prema Shannon – Wienerovom indeksu, veća u šumama Žumberačkog gorja. Dominantne vrste s najvećom gustoćom populacije u oba Parka imaju zeba, crvendać i crnokapa grmuša. Gustoće populacija pojedinih vrsta ptica te pojedinih ekoloških skupina razlikuju se u pojedinim tipovima šuma i u Parkovima, a uvelike ovise o strukturalnim obilježjima vegetacije. Research was conducted in order to determine the characteristics of bird communities in forests of Nature parks Medvednica and Žumberak – Samoborsko gorje. The point-count method was used for analyzing bird community and circular plot method for habitat mapping. The tree basal area was used to distribute investigated points into five forest types: oak, beech, coniferous, mixed deciduous and conifer/deciduous mixed forests. The number of bird species recorded in Medvednica was 39 and in Žumberak 49. Population density of forest singing birds was greater in Medvednica and biodiversity of bird species, according to Shannon – Wiener index, was greater in Žumberak. Dominant species with highest population densities in both Parks were Chaffinch, Robin and Blackcap. Population densities of particular bird species and ecological groups were different between particular forest categories and also between the two Parks. Population densities showed dependence on structural vegetation characteristics. |
