التفاصيل البيبلوغرافية
| العنوان: |
Characterization of Phytoplankton-Derived Amino Acids and Tracing the Source of Organic Carbon Using Stable Isotopes in the Amundsen Sea |
| المؤلفون: |
Jun-Oh Min, Min-Seob Kim, Boyeon Lee, Jong-Ku Gal, Jinyoung Jung, Tae-Wan Kim, Jisoo Park, Sun-Yong Ha |
| المصدر: |
Marine Drugs, Vol 22, Iss 10, p 476 (2024) |
| بيانات النشر: |
MDPI AG, 2024. |
| سنة النشر: |
2024 |
| المجموعة: |
LCC:Biology (General) |
| مصطلحات موضوعية: |
Amundsen Sea, antarctica, amino acid, P. antarctica, stable isotope, Biology (General), QH301-705.5 |
| الوصف: |
We utilized amino acid (AA) and carbon stable isotope analyses to characterize phytoplankton-derived organic matter (OM) and trace the sources of organic carbon in the Amundsen Sea. Carbon isotope ratios of particulate organic carbon (δ13C-POC) range from −28.7‰ to −23.1‰, indicating that particulate organic matter originated primarily from phytoplankton. The dissolved organic carbon isotope (δ13C-DOC) signature (−27.1 to −21.0‰) observed in the sea-ice melting system suggests that meltwater contributes to the DOC supply of the Amundsen Sea together with OM produced by phytoplankton. A negative correlation between the degradation index and δ13C-POC indicates that the quality of OM significantly influences isotopic fractionation (r2 = 0.59, p < 0.001). The AA distribution in the Amundsen Sea (5.43 ± 3.19 µM) was significantly larger than previously reported in the Southern Ocean and was associated with phytoplankton biomass (r2 = 0.49, p < 0.01). Under conditions dominated by P. antarctica (DI = 2.29 ± 2.30), OM exhibited greater lability compared to conditions co-dominated by diatoms and D. speculum (DI = 0.04 ± 3.64). These results highlight the important role of P. antarctica in influencing the properties of OM, suggesting potential impacts on carbon cycling and microbial metabolic activity in the Amundsen Sea. |
| نوع الوثيقة: |
article |
| وصف الملف: |
electronic resource |
| اللغة: |
English |
| تدمد: |
1660-3397 |
| Relation: |
https://www.mdpi.com/1660-3397/22/10/476; https://doaj.org/toc/1660-3397 |
| DOI: |
10.3390/md22100476 |
| URL الوصول: |
https://doaj.org/article/a28ff70abd4f484fbd1fc2fee2b40245 |
| رقم الانضمام: |
edsdoj.28ff70abd4f484fbd1fc2fee2b40245 |
| قاعدة البيانات: |
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