Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 89. (Budapest 1997)

Szollát, Gy., Stollmayer-Boncz, E. , Standovár, T. ; Kecskés, F.: Vegetation of the Réti-dűlő and Csömöri-tó (Hungary)

Table 6. Basic data of the 25 phytosociological relevés No. of relevé 11 20 24 28 34 35 36 37 Date 1 993 VI.2. VI.28. Cover of herb layer (%) 80 90 90 100 90 100 100 100 Cover of moss layer (%) 60 40 No. of relevé 38 4 7 8 9 10 13 14 Date 1993 1991 1993 1991 1991 1991 1993 1993 VI.

28. IX.4. VI.2. 1X4. V.22. IX.4. VI.28. VI.2. Cover of herb layer (%) 100 100 100 100 100 100 100 100 Cover of moss layer (%) 5 No. of relevé 15 16 18 19 21 22 23 26 Date 1991 1993 1991 VI.

15. IX.4. VI.

15. VI. 15. IX.4. VI.2. VI.15. IX.4. Cover of herb layer (%) 100 100 100/95 100 100 100 100 100 Cover of moss layer (%) No. of relevé 27 Date 1993. VI.28. Cover of herb layer (%) 100 Cover of moss layer (%) As the results in Table 2 show, these two communities (unlike the complete flora of the Réti-dűlő) are relatively free from the effects of serious degradation in terms of nature conservation rank distribution. (Unusually high importance of strictly protected plants in the sedge tuft community is caused by the dominant Carex appropinquata) Table 5 shows the phytosociological data collected from the Csömöri-tó. Most relevés belong to Scirpo-Phragmitetum typhetosum (incl. former Typhetosum angustifoliae) CONCLUDING REMARKS Long-term survival of this small isolated area is endangered by several factors. It lies close to a village, surrounded by arable fields and the water regime of the area has been changed. Consequently the still valuable vegetation can only be preserved by active conservation measures. Apart from the completely destroyed Spagnum bog, the vegetation of this area contains the characteristic species pool of valuable fen, swamp and meadow communities. In addition to these floristic values, natural composition of these communities has also been