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204 TÓTH, M., BÁRÁNY, A. & KIS, R. Fig. 3. Density of stone marten records (n = 214) in Budapest districts (n = 23) between 1996 and 2008. The black coloured columns represent the districts with at least one or more registrations per km 2 ratio of green pixels 80 70 60 50 40 30 20 10 0 Acta zool. hung. 55, 2009 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Code of districts in Budapest Fig. 4. Average greenness (%) of those 25 ha patches (n = 225) that contained at least one marten record. Green (> 50%) districts are highlighted in black
AN EVALUATION OF STONE MARTEN (MARTES FOINA) RECORDS IN BUDAPEST, HUNGARY 205 Habitat patches Martens appeared to show a preference for GREEN habitats as the majority (67.7%) of records were located in green type of habitat patches. Nevertheless, in some cases marten record densities were actually higher in DESERT type habitats than in the GREEN patches. For example, all records on Üllői street (districts 8 and 9), which is situated in the central part of Pest, a highly built-up, disturbed and crowded part of Budapest were located in DESERT type patches. Sightings in these DESERT patches were frequent (up to 10 records / patch), whereas, several GREEN patches had only one or two records during the long-term observation period. Stone martens showed a strong preference for old multi- storey buildings with a quadrangle. There were 69 DESERT patches among the 214 topographical detections. Thirty-nine of those were identified as having extremely small green coverage (proportion of green pixels 5–30%), with 30 patches being classed as multi-storey buildings with quadrangles (BB), 3 as family houses (AB) and 6 as others (CB). density 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 5 7 8 9 13 1 11 14 4 18 16 21 12 3 19 22 15 -0.5 0 10 20 30 40 greenness 50 60 70 80 Fig. 5. Scatterplot diagram representing the “greenness” (% of green cover) of districts and the density (records/km 2 ) of records within them 17 23 2 20 Acta zool. hung. 55, 2009
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AN EVALUATION OF STONE MARTEN (MARTES ... - ResearchGate

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