Soil respiration and its main limiting factors in a semiarid sand forest-steppe ecosystem - Results of a climate simulation experiment

Eszter Lellei-Kovács, Edit Kovács-Láng, T. Kalapos, Z. Botta-Dukát

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A stand-scale climate change experiment with passive nighttime warming and rain exclusion treatments was conducted in in the semiarid Pannonian sand forest steppe of the Kiskunság, as part of the European VULCAN Project. Response of soil respiration was measured monthly in the vegetation periods between 2003 and 2007. Besides the very low soil carbon efflux rates (0.09-1.60 μmol CO 2 m -2 s -1), close correlation was found between soil respiration rate and soil temperature, while the influence of soil moisture could be detected only below 2.5 vol%, when water stress supressed the temperature response of soil respiration. The primary temperature effect is obvious from the diurnal changes of soil respiration, even during water-limited periods of the growing season, while the seasonal course is characterized by clear temperature limitation in winter and water limitation in summer. For the soil respiration rate - temperature relationship a bell-shaped function gave the best fit in this ecosystem. Both nocturnal warming and rain exclusion treatments had negative influence on soil respiration, presumably because of the drought imposed by both treatments. These results suggest a decline in the amount of carbon emission from the soil in this ecosystem with the forecasted climate change.

Original languageEnglish
Pages (from-to)1223-1226
Number of pages4
JournalCereal Research Communications
Volume36
Issue numberSUPPL. 5
DOIs
Publication statusPublished - 2008

Fingerprint

soil respiration
Climate
steppes
Ecosystem
Respiration
Soil
sand
climate
ecosystems
Temperature
temperature
climate change
Rain
Climate Change
rain
Respiratory Rate
carbon
Carbon
soil temperature
Grassland

Keywords

  • Experimental warming
  • Soil carbon dioxide efflux
  • Temperature response
  • Water limitation

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Genetics
  • Physiology

Cite this

Soil respiration and its main limiting factors in a semiarid sand forest-steppe ecosystem - Results of a climate simulation experiment. / Lellei-Kovács, Eszter; Kovács-Láng, Edit; Kalapos, T.; Botta-Dukát, Z.

In: Cereal Research Communications, Vol. 36, No. SUPPL. 5, 2008, p. 1223-1226.

Research output: Contribution to journalArticle

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