Ábrahám Levente: Válogatott tanulmányok II. - Natura Somogyiensis 9. (Kaposvár, 2006)

Horváth Győző, Schäffer Dávid, Molnár Dániel, Pogány Ákos: Kisemlősök populációs és közösségi vizsgálata két ártéri erdőtípusban - Population and community studies of small mammals in two types of floodland forest

332 NATURA SOMOGYIENSIS JENSEN, T. S. 1975: Trappability of various functional groups of the forest rodents Clethrionomys glareolus and Apodemus flavicollis, and its application in estimations of density. Oikos, 26(2): 196-204. JENSEN, T. S. 1984: Habitat distribution, home range and movements of rodents in mature forest and reforestations. Acta Zoologica Fennica, 171: 305-307. LIRO, A. & SZACKI, J. 1987: Movements of field mice Apodemus agrárius (Pallas) in a suburban mosaic of habitats. Oecologia, 74: 438-440. MIKES, M. & HABIJAN-MIKES, V. 1985: Coenotic relations of small mammals along the river Tisza. Tiscia (Szeged), 20: 135-143. OTIS, D. L., BURNHAM, K. P., WHITE, G. C., & ANDERSON, R. 1978: Statistical inference for capture data from closed populations. Wildlife Monographs 62:135pp. PALOTÁS, G. 1986: Kisemlősök populációinak és közösségeinek szerkezete és dinamikája a Hortobágyon. Kandidátusi értekezés tézisei., 141 pp. PAPP, J. L. 1971: Aranyosgadány kisemlősfaunája gyűjtések és bagolyköpet-vizsgálatok alapján. Vertebrata Hungarica 12: 69-78. PUCEK, Z., JEDRZEJEWSKA, В., PUCEK, M. 1993: Rodent population dynamics in primeval deciduous forest (Bialowieza National Park) in relation to weather, seed crop, and prédation. Acta Theriologica 38: 199-232. SMAL, C. M., FAIRLEY, J. S. 1982: The dynamics and regulation of small rodent populations in the woodland ecosystems of Killarney, Ireland. Journal of Zoology London 196: 1-30. WHITE, G. C, ANDERSON, D. R., BURNHAM, K. P. & OTIS, D. L. 1982: Capture-recapture and removal methods for sampling close populations. Los Alamos National Laboratory, LA-8787-NERP, Los Alamos, New Mexico, USA. Population and community studies of small mammals in two types of floodland forest GYŐZŐ HORVÁTH, DÁVID SCHÄFFER, DÁNIEL MOLNÁR & ÁKOS POGÁNY Two 1-hectare forest stands were chosen as sampling sites in the monitoring area of river Drava: one was a lowland alder gallery forest {Paridi quadrifoliae-Alnetum) within the Lankóci forest, whereas the other was a softwood willow-poplar (SaliciPopuletum) gallery forest directly along the river in the neighbourhood of Vízvár. A csapdázási mintahelyeinken kvadrát-módszert, illetve az utóbbi helyen vonal transzekt módszert alkalmaztunk. In our trapping sample plots we used quadrate sampling method, and line transect in the latter location. 121 live-capturing traps were used in the study plots. Trapping was done using the capture-mark-recapture (CMR) method. 3 shrew and 3 rodent species have been indicated in the Vízvár sample area, the most frequent species being A. agrárius. In the alder gallery forest of the Lankóci forest 8 species have been recorded (5 rodents and 3 shrews), which indicates considerably greater species richness. The dominant population of the alder forest, based on its markedly higher numbers, has been Clethrionomys glareolus. In the case of this dominant species, trapping was suitable for estimating population size, by performing closed population models. Based on the results, despite the high water level in the territory in spring the C. glareolus population could reach high autumn density. The changing water level of Drava has great influence on the small mammal populations in the adjacent softwood gallery forest, as proved by our findings in Vízvár: the inundated areas were deserted by the small mammal species. Populations in the Lankóczi forest could better avoid the periodic water cover of the alder forest, by their emigration-recolonisation dynamics.