Original paper

Effect of dwarf pine vegetation on karren dissolution

Skribanek, A.; Deák, G.y.; Veress, M.


Soil CO2 content of areas with different vegetation coverings was investigated in alpine terrains (Totes Gebirge). Dissolution of limestone was compared on slopes with vegetation patches (grass or dwarf pine) and on bare slopes. Dissolution intensity was also studied on a model system. CO2 measurements were performed using an infrared gas analyzator. Amount and role of tannin in the dissolution process was also investigated. CO2 content of the soil was found higher under vegetation patches because of the degradation of organic materials. It was highest under grass patches, followed by dwarf bushes, dwarf pines with grass undergrowth and it was the lowest under dwarf pines. The CO2 content of the soil with no vegetation was not significantly lower than that under dwarf pines.Dissolution of limestone tablets was greater in the soil than on the surface. Temperature and the dissolution rate did not correlate. The dissolution rate depended primarily on the presence of water, especially in the colder seasons, whereas in the summer growing season CO2 produced by degradation could cause more intense dissolution under the vegetation. The tanin and acid contents of degrading organic materials could also play a significant role in the dissolution process.


dwarf pineco2 contentkarrlimestonesolution