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

Fenyősi, László: Studies of avian communities along river Drava, between 2000-2004 (Aves) - Madárközösségek vizsgálata a Dráva somogyi szakasza mentén, 2001-2004-ben

FENYŐSI L.: STUDIES OF AVIAN COMMUNITIES 123 Table 2.: Results of the surveys done in the Zákány sample area between 2000-2004 Year Number of species Number of nesting pairs Density (pairs/10 ha) 2000 30 209 60.61 2001 36 230 66.7 2002 33 261 75.69 2003 36 263 76.27 2004 36 264 76.56 ing populations of Acrocephalus palustris (8-17 pairs annually), Dendrocopos médius (1-2 pairs annually), Ficedula albicollis (3-5 pairs annually) and Locustella fluviatilis (617 pairs annually) in the sample area is considered to be an important nature conservation value. - Vízvár sample area The sample area is located south of the village Vízvár, in the floodland forest on the left side of the Drava (Fig. 2.). The survey was done in a 100 m radius circle in the case of 10 sampling points, and in a 100 m radius semi-circle in 5 other sampling points (due to habitat characteristics). Thus, the studied area covers 39.25 ha. Results of the surveys between 2000-2004 in the sample area are shown in Tables 3-4. There were 42 species nesting at least once in the monitoring area between 2000-2004; these are listed in Table 3. Among nesting species in the sample area the dominant ones were Sylvia atri-capilla (D: 10.0-10.5), Fringilla coelebs (D:5.

5-7.25), Sturnus vulgaris (D:4.25-6.25), Turdus merula (D:3.75-5.25) and Phylloscopus collybita (D:4.25-5.0). The presence of the populations of Dendrocopos major (6-9 pairs annually), Ficedula albicollis (1-8 pairs annually) and Locustella fluviatilis (3-6 pairs annually) in the sample area is considered to be an important nature conservation value. Fig. 2.: Location of the Vízvár sample area