Carbon isotope fractionation in karst aquatic mosses
- Resource Type
- Authors
- Ines Krajcar Bronić; Antun Alegro; Jadranka Barešić; Nada Horvatinčić; Damir Borković; Maja Vurnek; Ivanka Lovrenčić Mikelić; Andrijana Brozinčević; Andreja Sironić
- Source
- Isotopes in Environmental and Health Studies. 57:142-165
- Subject
- Aquatic Organisms
010504 meteorology & atmospheric sciences
Croatia
Climate
0207 environmental engineering
Fresh Water
Bryophyta
02 engineering and technology
Fractionation
aquatic mosses
karst
photosynthesis
carbon-13
carbon-14
Isotope ecology
isotope fractionation
01 natural sciences
law.invention
Inorganic Chemistry
Isotope fractionation
Rivers
Species Specificity
law
Environmental Chemistry
Carbon Radioisotopes
Radiocarbon dating
020701 environmental engineering
0105 earth and related environmental sciences
General Environmental Science
Carbon Isotopes
geography
geography.geographical_feature_category
δ13C
Radiometric Dating
Carbon-13
Carbon Dioxide
Karst
Lakes
Isotopes of carbon
Environmental chemistry
Environmental science
Carbon-14
- Language
- ISSN
- 1477-2639
1025-6016
Radiocarbon activity (a14C) and 13C composition (δ13C) were measured in hygrophyte and mesophyte (land) mosses collected in the natural habitat of the Plitvice Lakes and along the Zrmanja and Krupa Rivers (typical continental and Mediterranean climates, respectively), Croatia. a14C and δ13C values of mosses, of atmospheric CO2 and dissolved inorganic carbon (DIC) were compared for contemporary data and for data from 30 years ago at the Plitvice Lakes when 14C activity of atmospheric CO2 was ~30% higher. A positive 18 correlation between a14Cmoss and δ13Cmoss was observed for all data reflecting change of 19 carbon isotopic composition in DIC along the water flows and in atmospheric CO2 regardless of the climatic regions and historic period. Fraction of the atmospheric carbon in moss (ωatm. C) and carbon fractionation factor from aquatic CO2 (DIC) to moss tissue (εmoss/g-aq) were calculated for each individual moss. Three species of mosses had ωatm. C ~0 % implying that they turn to anabiosis during dry periods. The relation εmoss/g-aq vs. ωatm. C differentiates true aquatic and amphiphyte mosses. The first had a statistically significant negative correlation between εmoss/g-aq and ωatm. C. The amphiphyte mosses had lower εmoss/g-aq with higher water flow rates.