Photomineralization of organic carbon in a eutrophic, semiarid estuary
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...
Published in: | Limnology and Oceanography Letters |
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Online Access: | https://hdl.handle.net/1969.6/89590 https://doi.org/10.1002/lol2.10146 |
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fttexasamucorpus:oai:tamucc-ir.tdl.org:1969.6/89590 2023-10-25T01:36:51+02:00 Photomineralization of organic carbon in a eutrophic, semiarid estuary Wang, Hongjie Hu, Xinping Wetz, Michael S. Hayes, Kenneth C. Lu, Kaijun 2020-01-28 application/pdf https://hdl.handle.net/1969.6/89590 https://doi.org/10.1002/lol2.10146 unknown Wiley Periodicals, Inc. Wang, 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: 246-253 https://hdl.handle.net/1969.6/89590 https://doi.org/10.1002/lol2.10146 Article 2020 fttexasamucorpus https://doi.org/10.1002/lol2.10146 2023-09-25T10:16:13Z 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 Texas A&M University - Corpus Christi: DSpace Repository Baffin Bay Limnology and Oceanography Letters 5 3 246 253 |
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Open Polar |
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Texas A&M University - Corpus Christi: DSpace Repository |
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fttexasamucorpus |
language |
unknown |
description |
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 |
Wang, Hongjie Hu, Xinping Wetz, Michael S. Hayes, Kenneth C. Lu, Kaijun |
spellingShingle |
Wang, Hongjie Hu, Xinping Wetz, Michael S. Hayes, Kenneth C. Lu, Kaijun Photomineralization of organic carbon in a eutrophic, semiarid estuary |
author_facet |
Wang, Hongjie Hu, Xinping Wetz, Michael S. Hayes, Kenneth C. Lu, Kaijun |
author_sort |
Wang, Hongjie |
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 Periodicals, Inc. |
publishDate |
2020 |
url |
https://hdl.handle.net/1969.6/89590 https://doi.org/10.1002/lol2.10146 |
geographic |
Baffin Bay |
geographic_facet |
Baffin Bay |
genre |
Baffin Bay |
genre_facet |
Baffin Bay |
op_relation |
Wang, 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: 246-253 https://hdl.handle.net/1969.6/89590 https://doi.org/10.1002/lol2.10146 |
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 |
_version_ |
1780731847426179072 |