Articles | Volume 12, issue 20
Biogeosciences, 12, 6251–6258, 2015
https://doi.org/10.5194/bg-12-6251-2015
Biogeosciences, 12, 6251–6258, 2015
https://doi.org/10.5194/bg-12-6251-2015

Research article 30 Oct 2015

Research article | 30 Oct 2015

Radiocarbon isotopic evidence for assimilation of atmospheric CO2 by the seagrass Zostera marina

K. Watanabe and T. Kuwae

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Our empirical study demonstrates the quantitative evidence of assimilating atmospheric modern CO2 by the seagrass Zostera marina, by analyzing the radiocarbon isotope concentrations (Δ14C) of both the seagrass and two carbon sources in a brackish lagoon. CO2 exchange between the air and water would occur at the very thin film of water over the air-exposed seagrass leaves. Our finding offers better understanding of the role of seagrass meadows in global coastal carbon dynamics.
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