Photomineralization of organic carbon in a eutrophic, semiarid estuary

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dc.contributor.authorWang, Hongjie
dc.contributor.authorHu, Xinping
dc.contributor.authorWetz, Michael S.
dc.contributor.authorHayes, Kenneth C.
dc.contributor.authorLu, Kaijun
dc.date.accessioned2021-05-19T18:59:35Z
dc.date.available2021-05-19T18:59:35Z
dc.date.issued2020-01-28
dc.description.abstractThe effect of photomineralization on the carbon cycle in a eutrophic, semiarid estuary (Baffin Bay, Texas) was investigated using closed-system incubations. Photochemical production rate of dissolved inorganic carbon ranged from 0.16 to 0.68 μM hr−1, with a daily removal of 0.3∼1.5% of the standing stock of dissolved organic carbon (DOC). The photomineralization rate was negatively correlated with chlorophyll a concentration, suggesting that plankton-derived DOC was less photoreactive to solar radiation. The stable carbon isotope composition (δ13C∼ −18.6‰) of degraded DOC, as calculated using the DIC “Keeling” plot, further indicated high photochemical lability of 13C-enriched DOC in this semiarid environment. Our finding showed that photomineralization of 13C-enriched DOC is an important component of carbon cycle in this system, and this process does not necessarily remove 13C-depleted organic carbon as observed in other coastal systems.en_US
dc.identifier.citationWang, H., X. Hu, M.S. Wetz, K.C. Hayes, and K. Lu. 2020. Photomineralization of organic carbon in a eutrophic, semiarid estuary. Limnology and Oceanography Letters 5: 246-253en_US
dc.identifier.doihttps://doi.org/10.1002/lol2.10146
dc.identifier.urihttps://hdl.handle.net/1969.6/89590
dc.publisherWiley Periodicals, Inc.en_US
dc.titlePhotomineralization of organic carbon in a eutrophic, semiarid estuaryen_US
dc.typeArticleen_US

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