L. Forró szerk.: Miscellanea Zoologica Hungarica 13. 2000 (Budapest, 2000)
Horváth, Gy.; Pintér, V.: Small mammal fauna of two abandoned field habitats, and a spatio-temporal analysis of four rodent populations
Nagycsány 1997 Páprád 1997 Nagycsány 1998 Páprád 1998 Number of individuals/1 00 trap nights 'Number of species Fig. 7. Number of individuals/ 100 trap nights and number of speciesin the two habitats (1997-1998) Although there were more species captured here, low diversity was caused by A. agrárius which had high relative frequency and was dispersing in great masses. There was no significant difference, in either of the two periods, when the diversities of the two plots were compared (1997: t = 1.052, NS, 1998: t = 0.757, NS). The t-test results were confirmed by the output of Rényi's diversity ordering. Diversity profiles intersect in both of the charts, with no significant difference between the 1997 and 1998 values in either of the areas (Fig. 8). 2,2 1 t 2 > 1,8 •6 2 1,4 1,2 Nagycsány (A) 0 0,3 0,6 0,9 1,2 1.5 1,8 2,1 2.4 2.7 3 3,3 3,6 3,9 scale parameter 2,5 £2,3 S 2,1 I 1,9 I 1,5 1.3 U 0,9 0,7 • 1997 (march-oct.) 1 1998 (march-oct.) Páprád (B) 0 0,3 0,6 0,9 1,2 1.5 1,8 2,1 2,4 2,7 3 3,3 3,6 3,9 scale parameter 1997 (sept.) 1998. (sept.) 1 Fig. 8. Diversity ordering of the two sampling years in two habitats A, B In the Nagycsány area (plot A) the difference between the two years was caused by the high number of A. agrárius and M. arvalis appearing in the second year, which reduced both diversity and evenness. Not even the appearance of shrews in plot B lead to a diffrence between the diversity of the areas, which fact, too, was a result of the high number of A. agrárius. The comparison of the two areas was based on trapping results from corresponding periods: September and October 1997, and from May to September 1998, respectively (Fig. 9). Both figures indicate that diversity profiles intersect here too, suggesting that even in this respect there was no difference between the diversities of the two habitats.
