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Carbon Uptake in Aquatic Plants Deduced From Their Natural 13C and 14C Content

Published online by Cambridge University Press:  18 July 2016

Elena Marčenko ,
Dušan Srdoč ,
Stjepko Golubić ,
Jože Pezdič  and
M J Head
Elena Marčenko
Affiliation:
Ruder Bošković Institute, P O Box 1016, 41001 Zagreb, Yugoslavia
Dušan Srdoč
Affiliation:
Ruder Bošković Institute, P O Box 1016, 41001 Zagreb, Yugoslavia
Stjepko Golubić
Affiliation:
Department of Biology, Boston University, 2 Cummington Street, Boston, Massachusetts 02215
Jože Pezdič
Affiliation:
Inštitut Jožef Štefan, Jamova 39, 61000 Ljubljana, Yugoslavia
M J Head
Affiliation:
Radiocarbon Dating Research Laboratory, Australian National University, Canberra, ACT 2061, Australia
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Abstract

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δ13C and 14C activity measurements were made on terrestrial, marsh and aquatic plants growing in their natural habitat of the Plitvice Lakes in northwest Yugoslavia. δ13C values were ca −47 for aquatic mosses, which indicate that the carbon source was dissolved inorganic carbon (DIC) from alkaline karst waters, following a C3 pathway, and ca −25 for marsh plants, indicating the carbon source was atmospheric CO2. 14C activity of true aquatic plants and submerged parts of helophytes was close to 14C activity of DIC, whereas that of emergent parts of helophytes and terrestrial plants was similar to atmospheric CO2 activity. Aquatic plants which use DIC in freshwater for their photosynthesis are not suitable for 14C dating, unless the initial activity of incorporated carbon is known. δ13C values of plant material also depend on the carbon source and cannot be used for 14C age correction.

Type
III. Global 14C Variations
Information
Radiocarbon , Volume 31 , Issue 3: June 20-25, 1988 Dubrovnik, Yugoslavia , 1989 , pp. 785 - 794
Copyright
Copyright © The American Journal of Science 

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