Geographia Polonica (2020) vol. 93, iss. 4

Lichenometric curve for the southern slope of the Tatra Mountains (Slovak Tatras)

Stanisław Kędzia, Juraj Hreško, Gabriel Bugár

Geographia Polonica (2020) vol. 93, iss. 4, pp. 597-610 | Full text
doi: https://doi.org/10.7163/GPol.0187

This paper presents the first lichenometric curve of Rhizocarpon geographicum for the southern slope of the Tatra Mts (Slovak Tatras). The curve was developed based on measurements carried out in the years 2018-2019. The curve was constructed using measurement results from 9 objects of known time of origin, situated in the Tatra Mts. at an altitude of 1,250-1,900 m a.s.l. On each of them, the diameter of the 5 largest thalli was measured. Their average diameter was assigned an age value and then the lichen factor was calculated and a classical lichenometric curve was developed, as well as a modified curve taking into account the effect of altitude on the rate of thallus growth. The lichen factor is in the range between approx. 34.5 mm/100 years at 1,900 m a.s.l. and 44 mm/100 years at 1,250 m a.s.l. No significant differences were found in the rate of thallus growth between the southern and northern slopes of the Tatra Mts.

Keywords: lichenometric dating, Rhizocarpon geographicum, Tatra Mountains

Stanisław Kędzia [kedzia@zg.pan.krakow.pl], Institute of Geography and Spatial Organization Polish Academy of Sciences, 31-018 Krakow, Sw. Jana 22, Poland
Juraj Hreško [jhresko@ukf.sk], Department of Ecology and Environmentalistics Faculty of Natural Sciences Constantine the Philosopher University in Nitra
Gabriel Bugár [gbugar@ukf.sk], Department of Ecology and Environmentalistics Faculty of Natural Sciences Constantine the Philosopher University in Nitra