Background processes at the population level during succession in grasslands on sand

G. Fekete, Z. Tuba, E. Melkó

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Two population characteristics, reproductive allocation (RA) and the intensity of photosynthesis, were investigated in the successional stages of the sandy grassland communities of the Great Hungarian Plain. Most of the species studied changed their allocational response as succession advanced. Compound path schemes, as casual models, were constructed and analysed for describing intra-individual effects (influence of assimilating organs and root mass of the plant sampled) as well as the phytosociological effects on RA. In pioneer stages, the high values of path coefficients show that the effect of assimilating organs is responsible for the variability of RA. It is also shown that annuals and perennials exhibit different behaviour as to the regulation of RA. It seems that-in terms of path analysis-the reproduction of annuals is influenced by internal factors only. In case of perennials, an external (namely phytosociological) regulation was also observed. It is suggested that successional stages play a role in regulating the photosynthetic intensity of both the dominant species and the whole plant assemblage.

Original languageEnglish
Pages (from-to)33-41
Number of pages9
JournalVegetatio
Volume77
Issue number1-3
DOIs
Publication statusPublished - Nov 1988

Keywords

  • Festucetum vaginatae
  • Path analysis
  • Photosynthetic intensity
  • Reproductive allocation
  • Successional stage

ASJC Scopus subject areas

  • Plant Science

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