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

196 NATURA SOMOGYIENSIS Table 2: Capture parameters of species trapped in Lankóci-forest in 2004 Species Number of captures Number of recaptures Number of individuals Months 08. 09. 10. 08. 09. 10. 08. 09. 10. Grid A Sorex araneus 5 1 5 1 Crocidura leucodon 1 2 1 2 Clethrionomys glareolus 38 34 35 9 14 24 29 27 20 Apodemus agrárius 18 12 8 6 12 8 Apodemus flavicollis 46 37 55 13 27 48 33 23 23 Grid В Sorex araneus 1 1 Crocidura leucodon 3 1 14 1 4 3 1 10 Crocidura suaveolens 2 2 Clethrionomys glareolus 9 5 31 1 16 8 5 21 Microtus arvalis 2 2 Apodemus agrárius 36 25 29 22 16 19 [7 15 14 Apodemus flavicollis 29 4 13 2 19 4 Apodemus sylvaticus 4 1 1 2 1 2 1 1 Capture numbers of the same small mammals were higher the following year, and because environmental parameters were also different in 2004 (the dry year was followed by one with more precipitation), species distributions in the various sampling months were also different, even if it is considered that sampling was done from August to October. A. agrárius was present in the regrowing area with almost identical proportions as in the forest plot, which fact - with capture parameters (Table 2.) also regarded - indicates that this species preferred this type of habitat to the closed alder gallery forest. In the case of A. flavicollis the results were the other way round, with an even distribution of its relative frequencies during the months being characteristic for Grid A. In the regrowing area its proportion was remarkable in August, then in autumn individuals of the population began to use this habitat less. The bank vole was found to be more stabile in 2004 both in capture parameters and in the distribution of relative frequencies during the months. Even the seasonal distribution of its relative frequency suggested that this species used not only the closed forest this year, but by autumn a considerable proportion of its population also occupied the regrowing plot. Among the two shrews, common shrew tended to use the closed forest, whereas С leucodon was found in the regrowing area, but both species were captured only from August on (Table 2.) (Fig. 2.). Fig. 2.: Distribution of the relative frequency values of characteristic small mammal species in the sampling months in 2004