Population dynamics and spatial pattern of small mammals in ...

196
NATURA SOMOGYIENSIS
Table 2: Capture parameters of species trapped in Lankóci-forest in 2004
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. agrarius 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 C. 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