Spatial distribution and abundance of model species hollow-nesting birds on the transformed territories in the north-eastern Ukraine

A. Chaplygina, D. Bondarets

G.S. Skovoroda Kharkiv National Pedagogical University
29, Artem St., Kharkiv 61002, Ukraine

It was shown that the highest nesting density noted for great and blue tits, gray flycatchers under NNP «Homilshanski forests» (70,4±9,8; 28,4±2,4 and 42,0±2,4 pairs/km², respectively), for collared flycatcher, nuthatch and robins – under natural boundary Vakalovschina, which is 87,0±5,4; 50,0±6,5 and 85,0±2,7 pairs/km², respectively. The dominant species are great and blue tits in the NNP «Homilshanski forests» (²d 1.13 and 1.26), and in the Forest Park (²d=1.71 and 1.56, respectively). The most visited horizon in the system Byallovicha is the second threshold BGG (16% of the total time budget). The dominant species by activity in maple and linden oak forests is collared flycatcher (23,32% of the time). The subdominant species are robin (20,89%) and blue tit (19,97%). The most extensive spatial niches are great and blue tits, nuthatches (Bs=0,78; 0,60; 0,76 respectively). The differentiation of spatial niches of gray flycatcher and blue tits was observed in the horizontalstructure of biogeocoenose, but not in vertical. It was found that the most active in the maple-linden oak forests are the representatives zoophages of the second size and weight of the cell (10,1–20,0 g).

Keywords: spatial distribution, abundance, nesting density, hollow-nesting birds, transformed territory

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