Temporal and spatial variability and pattern of soil respiration in loess grassland

Sz Fóti, J. Balogh, Z. Nagy, Zs Ürmös, S. Bartha, Z. Tuba

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Remnants of the former semiarid forest-steppe vegetation of Hungary are suspected to undergo degradation processes because of recent land-use changes. Secondary succession towards closing of the vegetation starts with shrub invasion, mainly with species of the shrub layer of loess steppe oak forest. Soil respiration (SR) activity of the intercanopy loess grassland community was followed occasionally along of six years period, as well as the spatial patterns of SR and soil water content (SWC) with three direct measuring campaigns. Dependence of SR on SWC-soil temperature was statistically significant for the six years period, but the rest of the variance should be explained by other factors, as found for normalized difference vegetation index. In the spatial analysis, significant differences were found in the ranges of semivariograms according to the seasonal variation of soil moisture content. Larger scale patches were found under summer water stress (4 m for SR, 2.6 m for SWC) and autumn senescence (3.8 m for SR, 1.3 m for SWC) periods than under well-watered, peak performance summer circumstances (0.8m for SR, 0.6mfor SWC). This suggests that homogeneity of patterns is typical at good water supply, while coarse-grained patches prevail under drought stress.

Original languageEnglish
Pages (from-to)57-64
Number of pages8
JournalCommunity Ecology
Volume9
Issue numberSUPPL. 1
DOIs
Publication statusPublished - Dec 1 2008

Keywords

  • CO exchange
  • Chamber technique
  • Kriging
  • Normalized difference vegetation index
  • Semivariance

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology

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