Vegetation patterns and responses to elevated CO2 from natural CO2 springs at Strmec (Radenci, Slovenia) = Vegetaciski vzorci in odzivi na povišano koncentracijo CO2 okrog naravnega vrelca CO2 Strmec (Radenci, Slovenija)
Kaligarič, Mitja
A natural CO2 spring emitting pure CO2 was found near Radenci (Slovenia). The vegetation near the spring was characterized to test the hypothesis that vegetation patterns are influenced by elevated ...CO2 concentrations. A vegetation map in scale 1:50 was made from which the following conclusions were drawn. Above the concentration of 8000 cm'.m' (ppm) there was almost no vegetation. Between the concentration 8000 and 2000 cm3.m-3 it was found that normal vegetational patterns changed due to reduced competition between different species. For example Polygonum aviculare, which is characteristic for trampled vegetation, was the most common species and dominated the vegetation pattern. The enriched CO2 atmosphere had the same effect as the mechanical disturbance. At mid-season, the seeds of Echinochloa crus-galli germinated in the highest concentration of CO2 and were flowering by the end of the growing season. Morphological changes in comparison with plants growingat normal ambient CO2 concentration were reported as well. V literaturinaveden pojav, da povisana koncentracija CO2 stimulativno vpliva na pojavljanje vrste Agrostis stolonifera se pojasnjuje le s prisotnostjo karbonatov v tleh. The phenomenon, mentioned in literature, that species Agrostis stolonifera, which grows around CO2 springs, is stimulated by elevated CO2 concentration in the air, was explained only by presence of carbonates in the soil.
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