Carbon isotope fractionation in karst aquatic mosses

Sironić, Andreja; Alegro, Antun; Horvatinčić, Nada; Barešić, Jadranka; Brozinčević, Andrijana; Vurnek, Maja; Bronić, Ines Krajcar; Borković, Damir; Mikelić, Ivanka Lovrenčić

doi:10.1080/10256016.2020.1852235

Cited by 3 publications

(5 citation statements)

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“…The mean values of δ C of tufa carbonates (−9.6 ± 0.8‰, Table 2) and δ 13 C of DIC (−11.4‰ [62]) indicate authigenic precipitation of carbonates from DIC. Both values are similar to the mean values of DIC and authigenic carbonate from another Dinaric karst system, Plitvice Lakes (−10.9 ± 1.3‰ and −8.9 ± 1.1‰, respectively) [34,63].…”

Section: Resultsmentioning

confidence: 98%

“…In this work a 0 was determined from the a 14 C of dissolved inorganic carbon (DIC) in water from which tufa precipitates, giving the most reliable information among the possibilities described earlier. For the Sanaderi location, a 14 C of DIC was 84.5 ± 0.3 pMC resulting in reservoir age of 1350 ± 20 years [62].…”

Section: Resultsmentioning

confidence: 99%

“…The hard-water effect of the organic matter was determined from a 14 C of the fresh moss sample, Eucladium verticillatum. The δ 13 C value of −34.2‰ and a 14 C value of 97.0 ± 0.9 pMC (Z-5948) of this moss indicate that atmospheric CO 2 is the main source of carbon with a possibility of incorporating DIC if flooded [62]. Additionally, the Suess effect [87], i.e., lower δ 13 C values of atmospheric CO 2 today than in the past, may also contribute to lower δ 13 C of moss.…”

Section: Tufa Age Implications From Isotope Analyses Of Organic Residues and Extracted Huminmentioning

confidence: 87%

“…14 C analyses of tufa organic residues gave higher a 14 C values compared to that of the carbonate fractions (Tables 2-4). The difference is expected due to a different intensity of the hard-water effect in organic and carbonate fractions [6,39,62,63]. In order to accept the obtained dates as reliable, the difference in a 14 C values between the organic residue and the carbonate should not be larger than 15 pMC [39,82].…”

Section: Tufa Age Implications From Isotope Analyses Of Organic Residues and Extracted Huminmentioning

confidence: 98%

“…The hard-water effect is also observed in organic matter since it is a mixture of different organics that photosynthesize from DIC and atmospheric CO 2 [26,62,[84][85][86]. Age correction due to a hard-water effect for organic matter is usually lower than that in the carbonate fraction [26].…”

Section: Tufa Age Implications From Isotope Analyses Of Organic Residues and Extracted Huminmentioning

confidence: 99%

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The Potential of Tufa as a Tool for Paleoenvironmental Research—A Study of Tufa from the Zrmanja River Canyon, Croatia

et al. 2021

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Tufa is a fresh-water surface calcium carbonate deposit precipitated at or near ambient temperature, and commonly contains the remains of macro- and microphytes. Many Holocene tufas are found along the Zrmanja River, Dalmatian karst, Croatia. In this work we present radiocarbon dating results of older tufa that was found for the first time at the Zrmanja River near the Village of Sanaderi. Tufa outcrops were observed at different levels, between the river bed and up to 26 m above its present level. Radiocarbon dating of the carbonate fraction revealed ages from modern, at the river bed, up to 40 kBP ~20 m above its present level. These ages fit well with the hypothesis that the Zrmanja River had a previous surface connection with the Krka River, and changed its flow direction toward the Novigrad Sea approximately 40 kBP (Marine Isotope Stage 3). Radiocarbon AMS dating of tufa organic residue yielded a maximum conventional age of 17 kBP for the highest outcrop position indicating probable penetration of younger organic material to hollow tufa structures, as confirmed by radiocarbon analyses of humin extracted from the samples. Stable carbon isotope composition (δ13C) of the carbonate fraction of (−10.4 ± 0.6)‰ and (−9.7 ± 0.8)‰ for the Holocene and the older samples, respectively, indicate the autochthonous origin of the carbonate. The δ13C values of (−30.5 ± 0.3)‰ and (−29.6 ± 0.6)‰ for organic residue, having ages <500 BP and >5000 BP, respectively, suggest a unique carbon source for photosynthesis, mainly atmospheric CO2, with an indication of the Suess effect in δ13C during last centuries. The oxygen isotopic composition (δ18O) agrees well with deposition of tufa samples in two stages, the Holocene (−8.02 ± 0.72‰) and “old” (mainly MIS 3 and the beginning of MIS 2) (−6.89 ± 0.34‰), suggesting a ~4 °C lower temperature in MIS 3 compared to the current one.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Tufa Age Implications From Isotope Analyses Of Organic Residues and Extracted Huminmentioning

confidence: 87%

Section: Tufa Age Implications From Isotope Analyses Of Organic Residues and Extracted Huminmentioning

confidence: 98%

Section: Tufa Age Implications From Isotope Analyses Of Organic Residues and Extracted Huminmentioning

confidence: 99%

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The Potential of Tufa as a Tool for Paleoenvironmental Research—A Study of Tufa from the Zrmanja River Canyon, Croatia

et al. 2021

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Environmental Isotope Studies at the Plitvice Lakes

2023

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APPLICATION OF ¹⁴C METHOD TO CHRONOLOGY OF THE CROATIAN DINARIC KARST—A CASE OF THE PLITVICE LAKES

2021

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Karst environments preserve some of the best archives of past climate, vegetation, hydrology, anthropogenic impact, and landscape evolution providing that a reliable chronology can be established. Here we present an example of the system of the Plitvice Lakes (Dinaric karst, Croatia), which is characterized by intensive tufa and lake sediment formations. The radiocarbon dating method, combined with some other dating methods and various geochemical and isotope analyses, showed that the Plitvice Lakes system in the present form has existed for about 8000 years. Older tufa deposits were dated to warm interglacial periods. A long-term comprehensive multi-proxy study showed that all environmental compartments (atmosphere, various water bodies, soil, bedrock, DIC, terrestrial and aquatic biota, and of course various secondary carbonates) must be included in order to obtain trustworthy results.

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Carbon isotope fractionation in karst aquatic mosses

Cited by 3 publications

References 85 publications

The Potential of Tufa as a Tool for Paleoenvironmental Research—A Study of Tufa from the Zrmanja River Canyon, Croatia

The Potential of Tufa as a Tool for Paleoenvironmental Research—A Study of Tufa from the Zrmanja River Canyon, Croatia

Environmental Isotope Studies at the Plitvice Lakes

APPLICATION OF ¹⁴C METHOD TO CHRONOLOGY OF THE CROATIAN DINARIC KARST—A CASE OF THE PLITVICE LAKES

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Carbon isotope fractionation in karst aquatic mosses

Cited by 3 publications

References 85 publications

The Potential of Tufa as a Tool for Paleoenvironmental Research—A Study of Tufa from the Zrmanja River Canyon, Croatia

The Potential of Tufa as a Tool for Paleoenvironmental Research—A Study of Tufa from the Zrmanja River Canyon, Croatia

Environmental Isotope Studies at the Plitvice Lakes

APPLICATION OF 14C METHOD TO CHRONOLOGY OF THE CROATIAN DINARIC KARST—A CASE OF THE PLITVICE LAKES

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APPLICATION OF ¹⁴C METHOD TO CHRONOLOGY OF THE CROATIAN DINARIC KARST—A CASE OF THE PLITVICE LAKES