Ábrahám Levente: Biomonitoring a Dráva folyó magyarországi szakasza mentén 2000-2004 - Natura Somogyiensis 7. (Kaposvár, 2005)

Horváth, Gy., Molnár, Dániel - Csonka, Gergely: Population dynamics and spatial pattern of small mammals in protected forest and reforested area - Kisemlősök populációdinamikája és térbeli mintázata védett erdei és újraerdősödő területen

HORVÁTH ET AL.: POPULATION DYNAMICS AND SPATIAL PATTERN 195 Table 1. Capture parameters of species trapped in Lankóci forest in 2003 Species Number of captures Number of recaptures Number of individuals Months 06. 08. 10. 06. 08. 10. 06. 08. 10. Grid A Sor ex araneus 10 10 2 1 1 9 10 2 Crocidura leucodon 2 3 2 2 3 2 Clethrionomys glareolus 17 3 6 13 3 Microtus subierraneus 1 1 Apodemus agrárius 3 13 6 1 7 4 2 9 3 Apodemus flavicollis 41 12 4 8 6 0 35 10 4 Apodemus sylvaticus 1 1 Grid В Sor ex araneus 3 14 9 2 3 14 8 Crocidura leucodon 10 6 ! 1 9 6 Clethrionomys glareolus 2 1 1 Apodemus agrárius 3 3 1 3 2 2 Apodemus flavicollis 9 5 3 1 2 8 5 2 with nearly identical frequency values, but instead of the expected density growth, no individuals of this species were captured in the autumn sampling month. The unfavourable environmental conditions encountered in 2003 are best expressed by the monthly distribution of A. flavicollis relative frequency. In both areas this species was most frequent in June, then decreased gradually by autumn when the population was rather found in the regrowing forest area. The distribution revealed for C. glareolus can be evaluated if the very low numbers are regarded. The strong preference of this species for closed forests is shown mainly by the values obtained in June. This year, with its densities much lower than the average, only few individuals were found in the regrowing plot. The proportion of common shrew in June was higher in the closed alder forest than in the regrowing area, and in August it was present in the two areas with more or less similar frequencies, but its proportion at the October sampling was higher in the regrowing area. The relative frequencies of C. leucodon during the months was quite even in the closed forest section, suggesting that in the strictly protected area this species is also continuously represented at lower numbers besides common shrew. С leucodon was a more characteristic species in the regrowing area (Table 1.), appearing mostly in the drier August and October, clearly shown by relative frequency values (Fig. 1.). Fig. 1.: Distribution of the relative frequency values of characteristic small mammal species in the sampling months in 2003