The Contribution of Small Phytoplankton Communities to the Total Dissolved Inorganic Nitrogen Assimilation Rates in the East/Japan Sea: An Experimental Evaluation
As a part of Korean-Russian joint expeditions in the East/Japan Sea during 2012 and 2015, a set of total and small (<2 μm) phytoplankton NO<sub>3</sub><sup>−</sup> and NH<sub>4</sub><sup>+</sup> uptake rate estimations were carried out. The study ai...
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MDPI AG
2020-10-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/8/11/854 |
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| author | Panthalil S. Bhavya Jae Joong Kang Hyo Keun Jang HuiTae Joo Jae Hyung Lee Jang Han Lee Jung Woo Park Kwanwoo Kim Hyung Chul Kim Sang Heon Lee |
| author_facet | Panthalil S. Bhavya Jae Joong Kang Hyo Keun Jang HuiTae Joo Jae Hyung Lee Jang Han Lee Jung Woo Park Kwanwoo Kim Hyung Chul Kim Sang Heon Lee |
| author_sort | Panthalil S. Bhavya |
| collection | DOAJ |
| description | As a part of Korean-Russian joint expeditions in the East/Japan Sea during 2012 and 2015, a set of total and small (<2 μm) phytoplankton NO<sub>3</sub><sup>−</sup> and NH<sub>4</sub><sup>+</sup> uptake rate estimations were carried out. The study aimed to assess the spatio-temporal variations in dissolved inorganic nitrogen (DIN) assimilation by the total and small phytoplankton. The results show that the total NO<sub>3</sub><sup>−</sup> uptake rates during 2012 varied between 0.001 and 0.150 μmol NL<sup>−1</sup>h<sup>−1</sup> (mean ± SD = 0.034 ± 0.033) and that the total NH<sub>4</sub><sup>+</sup> uptake rates ranged between 0.002 and 0.707 μmol NL<sup>−1</sup>h<sup>−1</sup> (mean ± SD = 0.200 ± 0.158). The total uptake rates during 2015 were ranged from 0.003 to 0.530 (mean ± S.D. = 0.117 ± 0.120 μmol NL<sup>−1</sup>h<sup>−1</sup>) for NO<sub>3</sub><sup>−</sup> and from 0.008 to 1.17 (mean ± S.D. = 0.199 ± 0.266 NL<sup>−1</sup>h<sup>−1</sup>) for NH<sub>4</sub><sup>+</sup>. The small phytoplankton NO<sub>3</sub><sup>−</sup> and NH<sub>4</sub><sup>+</sup> uptake rates during 2015 ranged between 0.001 and 0.164 (mean ± S.D. = 0.033 ± 0.036) μmol NL<sup>−1</sup>h<sup>−1</sup> and 0.010–0.304 (mean ± S.D. = 0.101 ± 0.073) μmol NL<sup>−1</sup>h<sup>−1</sup>, respectively. Small phytoplankton’s contribution to the total depth-integrated NO<sub>3</sub><sup>−</sup> and NH<sub>4</sub><sup>+</sup> uptake rates ranged from 10.24 to 59.36% and from 30.21 to 68.55%, respectively. The significant negative relationship observed between the depth-integrated total NO<sub>3</sub><sup>−</sup> and NH<sub>4</sub><sup>+</sup> uptake rates and small phytoplankton contributions indicates a possible decline in the DIN assimilation rates under small phytoplankton dominance. The results from the present study highlight the possibility of a reduction in the total DIN assimilation process in the East/Japan Sea when small phytoplankton dominate under strong thermal stratification due to sea surface warming. The present study’s findings agree with the model projections, which suggested a decline in primary production in the global warming scenario. |
| first_indexed | 2024-03-10T15:15:17Z |
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| language | English |
| last_indexed | 2024-03-10T15:15:17Z |
| publishDate | 2020-10-01 |
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| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-eec2a8b845ed4ed9b5b3db403ff7352a2023-11-20T18:59:36ZengMDPI AGJournal of Marine Science and Engineering2077-13122020-10-0181185410.3390/jmse8110854The Contribution of Small Phytoplankton Communities to the Total Dissolved Inorganic Nitrogen Assimilation Rates in the East/Japan Sea: An Experimental EvaluationPanthalil S. Bhavya0Jae Joong Kang1Hyo Keun Jang2HuiTae Joo3Jae Hyung Lee4Jang Han Lee5Jung Woo Park6Kwanwoo Kim7Hyung Chul Kim8Sang Heon Lee9Department of Oceanography, Pusan National University, Geumjeong-gu, Busan 609-735, KoreaDepartment of Oceanography, Pusan National University, Geumjeong-gu, Busan 609-735, KoreaDepartment of Oceanography, Pusan National University, Geumjeong-gu, Busan 609-735, KoreaOceanic Climate and Ecology Research Division, National Institute of Fisheries Science, Busan 46083, KoreaDepartment of Oceanography, Pusan National University, Geumjeong-gu, Busan 609-735, KoreaDepartment de Biologie and Quebec-Ocean, Université, Laval, QC G1V 0A6, CanadaGraduate School of Fisheries Sciences, Hokkaido University, Hakodate, Hokkaido 041-8611, JapanDepartment of Oceanography, Pusan National University, Geumjeong-gu, Busan 609-735, KoreaMarine Environmental Impact Assessment Center, National Institute of Fisheries Science, Busan 46083, KoreaDepartment of Oceanography, Pusan National University, Geumjeong-gu, Busan 609-735, KoreaAs a part of Korean-Russian joint expeditions in the East/Japan Sea during 2012 and 2015, a set of total and small (<2 μm) phytoplankton NO<sub>3</sub><sup>−</sup> and NH<sub>4</sub><sup>+</sup> uptake rate estimations were carried out. The study aimed to assess the spatio-temporal variations in dissolved inorganic nitrogen (DIN) assimilation by the total and small phytoplankton. The results show that the total NO<sub>3</sub><sup>−</sup> uptake rates during 2012 varied between 0.001 and 0.150 μmol NL<sup>−1</sup>h<sup>−1</sup> (mean ± SD = 0.034 ± 0.033) and that the total NH<sub>4</sub><sup>+</sup> uptake rates ranged between 0.002 and 0.707 μmol NL<sup>−1</sup>h<sup>−1</sup> (mean ± SD = 0.200 ± 0.158). The total uptake rates during 2015 were ranged from 0.003 to 0.530 (mean ± S.D. = 0.117 ± 0.120 μmol NL<sup>−1</sup>h<sup>−1</sup>) for NO<sub>3</sub><sup>−</sup> and from 0.008 to 1.17 (mean ± S.D. = 0.199 ± 0.266 NL<sup>−1</sup>h<sup>−1</sup>) for NH<sub>4</sub><sup>+</sup>. The small phytoplankton NO<sub>3</sub><sup>−</sup> and NH<sub>4</sub><sup>+</sup> uptake rates during 2015 ranged between 0.001 and 0.164 (mean ± S.D. = 0.033 ± 0.036) μmol NL<sup>−1</sup>h<sup>−1</sup> and 0.010–0.304 (mean ± S.D. = 0.101 ± 0.073) μmol NL<sup>−1</sup>h<sup>−1</sup>, respectively. Small phytoplankton’s contribution to the total depth-integrated NO<sub>3</sub><sup>−</sup> and NH<sub>4</sub><sup>+</sup> uptake rates ranged from 10.24 to 59.36% and from 30.21 to 68.55%, respectively. The significant negative relationship observed between the depth-integrated total NO<sub>3</sub><sup>−</sup> and NH<sub>4</sub><sup>+</sup> uptake rates and small phytoplankton contributions indicates a possible decline in the DIN assimilation rates under small phytoplankton dominance. The results from the present study highlight the possibility of a reduction in the total DIN assimilation process in the East/Japan Sea when small phytoplankton dominate under strong thermal stratification due to sea surface warming. The present study’s findings agree with the model projections, which suggested a decline in primary production in the global warming scenario.https://www.mdpi.com/2077-1312/8/11/854East/Japan Seasmall phytoplanktonnitrogen uptakeglobal warming |
| spellingShingle | Panthalil S. Bhavya Jae Joong Kang Hyo Keun Jang HuiTae Joo Jae Hyung Lee Jang Han Lee Jung Woo Park Kwanwoo Kim Hyung Chul Kim Sang Heon Lee The Contribution of Small Phytoplankton Communities to the Total Dissolved Inorganic Nitrogen Assimilation Rates in the East/Japan Sea: An Experimental Evaluation Journal of Marine Science and Engineering East/Japan Sea small phytoplankton nitrogen uptake global warming |
| title | The Contribution of Small Phytoplankton Communities to the Total Dissolved Inorganic Nitrogen Assimilation Rates in the East/Japan Sea: An Experimental Evaluation |
| title_full | The Contribution of Small Phytoplankton Communities to the Total Dissolved Inorganic Nitrogen Assimilation Rates in the East/Japan Sea: An Experimental Evaluation |
| title_fullStr | The Contribution of Small Phytoplankton Communities to the Total Dissolved Inorganic Nitrogen Assimilation Rates in the East/Japan Sea: An Experimental Evaluation |
| title_full_unstemmed | The Contribution of Small Phytoplankton Communities to the Total Dissolved Inorganic Nitrogen Assimilation Rates in the East/Japan Sea: An Experimental Evaluation |
| title_short | The Contribution of Small Phytoplankton Communities to the Total Dissolved Inorganic Nitrogen Assimilation Rates in the East/Japan Sea: An Experimental Evaluation |
| title_sort | contribution of small phytoplankton communities to the total dissolved inorganic nitrogen assimilation rates in the east japan sea an experimental evaluation |
| topic | East/Japan Sea small phytoplankton nitrogen uptake global warming |
| url | https://www.mdpi.com/2077-1312/8/11/854 |
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