Photomineralization of organic carbon in a eutrophic, semiarid estuary
Abstract The 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...
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ftdoajarticles:oai:doaj.org/article:5311ed1644b2403dba3dea581b9d8d23 2023-05-15T15:35:03+02:00 Photomineralization of organic carbon in a eutrophic, semiarid estuary Hongjie Wang Xinping Hu Michael S. Wetz Kenneth C. Hayes Kaijun Lu 2020-06-01T00:00:00Z https://doi.org/10.1002/lol2.10146 https://doaj.org/article/5311ed1644b2403dba3dea581b9d8d23 EN eng Wiley https://doi.org/10.1002/lol2.10146 https://doaj.org/toc/2378-2242 2378-2242 doi:10.1002/lol2.10146 https://doaj.org/article/5311ed1644b2403dba3dea581b9d8d23 Limnology and Oceanography Letters, Vol 5, Iss 3, Pp 246-253 (2020) Oceanography GC1-1581 article 2020 ftdoajarticles https://doi.org/10.1002/lol2.10146 2022-12-31T02:00:14Z Abstract The 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. Article in Journal/Newspaper Baffin Bay Directory of Open Access Journals: DOAJ Articles Baffin Bay Limnology and Oceanography Letters 5 3 246 253 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Oceanography GC1-1581 |
spellingShingle |
Oceanography GC1-1581 Hongjie Wang Xinping Hu Michael S. Wetz Kenneth C. Hayes Kaijun Lu Photomineralization of organic carbon in a eutrophic, semiarid estuary |
topic_facet |
Oceanography GC1-1581 |
description |
Abstract The 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. |
format |
Article in Journal/Newspaper |
author |
Hongjie Wang Xinping Hu Michael S. Wetz Kenneth C. Hayes Kaijun Lu |
author_facet |
Hongjie Wang Xinping Hu Michael S. Wetz Kenneth C. Hayes Kaijun Lu |
author_sort |
Hongjie Wang |
title |
Photomineralization of organic carbon in a eutrophic, semiarid estuary |
title_short |
Photomineralization of organic carbon in a eutrophic, semiarid estuary |
title_full |
Photomineralization of organic carbon in a eutrophic, semiarid estuary |
title_fullStr |
Photomineralization of organic carbon in a eutrophic, semiarid estuary |
title_full_unstemmed |
Photomineralization of organic carbon in a eutrophic, semiarid estuary |
title_sort |
photomineralization of organic carbon in a eutrophic, semiarid estuary |
publisher |
Wiley |
publishDate |
2020 |
url |
https://doi.org/10.1002/lol2.10146 https://doaj.org/article/5311ed1644b2403dba3dea581b9d8d23 |
geographic |
Baffin Bay |
geographic_facet |
Baffin Bay |
genre |
Baffin Bay |
genre_facet |
Baffin Bay |
op_source |
Limnology and Oceanography Letters, Vol 5, Iss 3, Pp 246-253 (2020) |
op_relation |
https://doi.org/10.1002/lol2.10146 https://doaj.org/toc/2378-2242 2378-2242 doi:10.1002/lol2.10146 https://doaj.org/article/5311ed1644b2403dba3dea581b9d8d23 |
op_doi |
https://doi.org/10.1002/lol2.10146 |
container_title |
Limnology and Oceanography Letters |
container_volume |
5 |
container_issue |
3 |
container_start_page |
246 |
op_container_end_page |
253 |
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1766365348994482176 |