دورية أكاديمية
Ocean acidification reduces iodide production by the marine diatom Chaetoceros sp. (CCMP 1690)
| العنوان: | Ocean acidification reduces iodide production by the marine diatom Chaetoceros sp. (CCMP 1690) |
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| المؤلفون: | Bey, E, Hughes, C, Hogg, K, Chance, R, Petrou, K |
| بيانات النشر: | ELSEVIER |
| سنة النشر: | 2024 |
| المجموعة: | University of Technology Sydney: OPUS - Open Publications of UTS Scholars |
| مصطلحات موضوعية: | 0399 Other Chemical Sciences, 0402 Geochemistry, 0405 Oceanography, Oceanography, 3703 Geochemistry, 3708 Oceanography |
| الوصف: | Phytoplankton in marine surface waters play a key role in the global iodine cycle. The biologically-mediated iodide production under future scenarios is limited. Here we compare growth, iodate to iodide conversion rate and membrane permeability in the diatom Chaetoceros sp. (CCMP 1690) grown under seawater carbonate chemistry conditions projected for 2100 (1000 ppm) and pre-industrial (280 ppm) conditions. We found no effect of CO2 on growth rates, but a significantly higher cell yield under high CO2, suggesting sustained growth from relief from carbon limitation. Cell normalised iodate uptake (16.73 ± 0.92 amol IO3− cell−1) and iodide production (8.61 ± 0.15 amol I− cell−1) was lower in cultures grown at high pCO2 than those exposed to pre-industrial conditions (21.29 ± 2.37 amol IO3− cell−1, 11.91 ± 1.49 amol I− cell−1, respectively). Correlating these measurements with membrane permeability, we were able to ascertain that iodide conversion rates were not linked to cell permeability and that the processes of mediated iodate loss and diatom-iodide formation are decoupled. These findings are the first to implicate OA in driving a potential shift in diatom-mediated iodate reduction. If our results are indicative of diatom-mediated iodine cycling in 2100, future surface ocean conditions could experience reduced rates of iodide production by Chaetoceros spp., potentially lowering iodide concentrations in ocean regions dominated by this group. These changes have the potential to impact ozone cycling and new particle formation in the atmosphere. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0304-4203 1872-7581 |
| العلاقة: | Marine Chemistry; Marine Chemistry, 2023, 257; http://hdl.handle.net/10453/175594Test |
| الإتاحة: | http://hdl.handle.net/10453/175594Test |
| حقوق: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.D5438233 |
| قاعدة البيانات: | BASE |
| تدمد: | 03044203 18727581 |
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