14C activity of Antarctic lichens

By the nuclear bomb tests during the 1950s and early 1960s, the radiocarbon content of the atmospheric CO, on the Southern Hemisphere rose within a few years from 98 to 162% of the standard recent value and then dropped to 122% (at the end of 1984). This rapid fluctuation was used to determine the lifetime of five species of lichens collected in the beginning of 1985 in the maritime Antarctic. Under the assumption that Lichens assimilate each year carbon at the same rate and that carbon once fixed at least in main branches never will be exchanged later on. The age of mature thalli of Caioplaco regalis, Ramalino tetebrata and Ustiea antarctica was determined to 32 years, while U, aurantiaco-atra and Himantormia lugubrisgave an age of ca. 38 years and ca. 60 years, respectively.

Supplement to: Willkomm, Horst; Bölter, Manfred; Kappen, Ludger (1992): Age estimation of Antarctic Macrolichens by radiocarbon measurements. Polarforschung, 61(2/3), 103-112

DOI https://doi.org/10.1594/PANGAEA.763182
PID https://hdl.handle.net/10013/epic.29685.d001
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.763182
Creator Willkomm, Horst; Bölter, Manfred; Kappen, Ludger
Publisher PANGAEA
Publication Year 1992
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Resource Type Supplementary Publication Series of Datasets; Collection
Format application/zip
Size 2 datasets
Discipline Earth System Research
Spatial Coverage (-58.469 LON, -62.153 LAT); King George Island, Antarctic Peninsula
Temporal Coverage Begin 1977-01-01T12:00:00Z
Temporal Coverage End 1998-12-31T12:00:00Z