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...
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Limnology and Oceanography Letters
2019
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fttexasamucorpus:oai:tamucc-ir.tdl.org:1969.6/87603 2023-10-25T01:36:51+02:00 Photomineralization of organic carbon in a eutrophic, semiarid estuary Wang, Hongjie Hu, Xinping Wetz, Michael Lu, Kaijun 2019-12-20T16:23:05Z application/pdf https://hdl.handle.net/1969.6/87603 https://hdl.handle.net/1969.6/87603https://hdl.handle.net/1969.6/87603 en_US eng Limnology and Oceanography Letters 2378-2242 2378-22422378-2242 https://hdl.handle.net/1969.6/87603 https://hdl.handle.net/1969.6/87603https://hdl.handle.net/1969.6/87603 Attribution 3.0 United States http://creativecommons.org/licenses/by/3.0/us/ photomineralization estuary stable carbon isotope dissolved organic carbon Article 2019 fttexasamucorpus 2023-09-25T10:20:44Z 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 the chlorophyll a concentration, suggesting that the 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 that the high photochemical lability of 13C-enriched DOC in this semiarid environment. Our finding showed that the photomineralization of 13C-enriched DOC is an important component of the carbon cycle in this system, and this process does not necessarily remove 13C-depleted organic carbon as observed in other coastal areas. Article in Journal/Newspaper Baffin Bay Texas A&M University - Corpus Christi: DSpace Repository Baffin Bay |
institution |
Open Polar |
collection |
Texas A&M University - Corpus Christi: DSpace Repository |
op_collection_id |
fttexasamucorpus |
language |
English |
topic |
photomineralization estuary stable carbon isotope dissolved organic carbon |
spellingShingle |
photomineralization estuary stable carbon isotope dissolved organic carbon Wang, Hongjie Hu, Xinping Wetz, Michael Lu, Kaijun Photomineralization of organic carbon in a eutrophic, semiarid estuary |
topic_facet |
photomineralization estuary stable carbon isotope dissolved organic carbon |
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 the chlorophyll a concentration, suggesting that the 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 that the high photochemical lability of 13C-enriched DOC in this semiarid environment. Our finding showed that the photomineralization of 13C-enriched DOC is an important component of the carbon cycle in this system, and this process does not necessarily remove 13C-depleted organic carbon as observed in other coastal areas. |
format |
Article in Journal/Newspaper |
author |
Wang, Hongjie Hu, Xinping Wetz, Michael Lu, Kaijun |
author_facet |
Wang, Hongjie Hu, Xinping Wetz, Michael 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 |
Limnology and Oceanography Letters |
publishDate |
2019 |
url |
https://hdl.handle.net/1969.6/87603 https://hdl.handle.net/1969.6/87603https://hdl.handle.net/1969.6/87603 |
geographic |
Baffin Bay |
geographic_facet |
Baffin Bay |
genre |
Baffin Bay |
genre_facet |
Baffin Bay |
op_relation |
2378-2242 2378-22422378-2242 https://hdl.handle.net/1969.6/87603 https://hdl.handle.net/1969.6/87603https://hdl.handle.net/1969.6/87603 |
op_rights |
Attribution 3.0 United States http://creativecommons.org/licenses/by/3.0/us/ |
_version_ |
1780731850158768128 |