Acta Botanica Register 21-30. (1986)
Introduction
4 Table 2 this reason, the percentages in Tabic 2 are based on the total number of occurrences, rather than on the mere number of papers in each category. Considering only the main categories, the most striking changes are seen in groups 3, 6 and 7. The proportion of physiological and phytochemical communications was the highest in decade II (27%) and was reduced by two-third in III. The change of the proportion of group 4 was constant, less than 0.1%. The contribution of ecological papers to the total has increased six times, whereas the proportion of coenological papers decreased to below one-third. This general picture, as any average, masks significant differences. Therefore, it is worth examining the percentage changes within some particular categories. For instance, within category 4 the contribution of algology and paleobotany tends to decrease (5—3.6-2.4% and 3.3-2.3-0.6%, respectively), whereas that of papers on the systcmatics of higher plants increases (5-6.7-7.1%). The scrutiny of group 5, whose global change is negligible, reveals interesting details. Papers on the flora of Hungary and neighbouring countries lost their importance (5-5-0.2%), just like those exclusively on the flora of Hungary (4.5-2.9-0.6%). The proportion of papers on the flora of other countries increased (0.5—4.6-8.3%). The proportion of ecological papers significantly increased in every subcategory (e.g., synecology: 3-6-8.5%; production ecology: 1-2-5%). Phytosociology (subcategories 7.1-7.2) shows a strong decreasing trend (18.6-6.7-2%). Within these categories the vegetation of various areas is discussed by 8.8-0.6-0.4%, whereas community types are described and analyzed by 9.8-6.1-1.6%. DecenniumI II III Main group о//о О General1 1 2 1 Morphology; Ontogeny8 10 10 2 Genetics1 2 1 3 Physiology; Biochemistry 17 278 4 Taxonomy; Phylogeny; Palaeobotany; Palynoiogy 23 23 23 5 Floristic and Geneticai Plant Geography 13 10 12 6 Ecology4 10 25 7 Phytosociology 25 118 8 Microbiology6 4 4 9 Applied Botany2 2 7