Dissolved Oxygen and Nutrients

Rho, TaeKeun; Lee, Tongsup; An, Shuqing

doi:10.1007/978-3-319-22720-7_6

Cited by 5 publications

(2 citation statements)

References 53 publications

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“…The average annual new production in the northern part was significantly higher (t-test, p < 0.01) than the southern part of the EJS. In the northern part of the EJS, deeper mixed layer depths during winter could provide more nitrate concentration into the euphotic zones from deep waters [43]. The annual new production had no specific trend in the EJS over the observation period from 2003 to 2015.…”

Section: Discussionmentioning

confidence: 98%

“…In previous studies, nitrate concentration in surface waters showed large variations in the EJS. Nitrate concentrations were 5.8-14.8 µM in the entire EJS during winter [43]. In summer, low nitrate concentrations were observed in the Ulleung Basin (<1 µM) and 0.3-5.5 µM in the northern EJS [43][44][45].…”

Section: The Spatial and Temporal Variation Of Sea Suface Nitrate (Ssmentioning

confidence: 98%

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Annual New Production of Phytoplankton Estimated from MODIS-Derived Nitrate Concentration in the East/Japan Sea

et al. 2018

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Abstract:Our main objective in this study was to determine the inter-annual variation of the annual new production in the East/Japan Sea (EJS), which was estimated from MODIS-aqua satellite-derived sea surface nitrate (SSN). The new production was extracted from northern (>40 • N) and southern (>40 • N) part of EJS based on Sub Polar Front (SPF). Based on the SSN concentrations derived from satellite data, we found that the annual new production (Mean ± S.D = 85.6 ± 10.1 g C m −2 year −1 ) in the northern part of the EJS was significantly higher (t-test, p < 0.01) than that of the southern part of the EJS (Mean ± S.D = 65.6 ± 3.9 g C m −2 year −1 ). Given the relationships between the new productions and sea surface temperature (SST) in this study, the new production could be more susceptible in the northern part than the southern part of the EJS under consistent SST warming. Since the new production estimated in this study is only based on the nitrate inputs into the euphotic depths during the winter, new productions from additional nitrate sources (e.g., the nitrate upward flux through the MLD and atmospheric deposition) should be considered for estimating the annual new production.

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Section: Discussionmentioning

confidence: 98%

Section: The Spatial and Temporal Variation Of Sea Suface Nitrate (Ssmentioning

confidence: 98%

Annual New Production of Phytoplankton Estimated from MODIS-Derived Nitrate Concentration in the East/Japan Sea

et al. 2018

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Random forest method for enhancing stroke diagnosis accuracy in comparison with naive bayes

Rajadurai,

Ramadevi

2024

AIP Conference Proceedings

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Chemical compositions and biological activities of marine invertebrates from the East Sea of South Korea

Kim

Park²,

Chandika

et al. 2019

Fish Aquatic Sci

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Background: Marine invertebrates are well known as pivotal bioresources with bioactive substances such as antiinflammatory sterols, antitumor terpenes, and antimicrobial peptides. However, there are few scientific reports on chemical compositions and bioactivities of marine invertebrates from the East Sea of South Korea. Methods: In this study, chemical compositions and biological activities were evaluated on both 70% EtOH and hot water extracts of 5 species of marine invertebrates (Crossaster papposus japonicus, Actinostola carlgreni, Stomphia coccinea, Actinostola sp., and Heliometra glacialis) collected from the East Sea of South Korea. The antioxidant activities were measured by ABTS radical scavenging assay. The cytotoxicity and anti-inflammatory activity were evaluated using MTT and Griess reagents. Moreover, the antibacterial effect was evaluated using paper disc assay and minimum inhibitory concentration (MIC) assay. Results: In the results of antioxidant activities, 70% EtOH extract of A. carlgreni showed the highest activity (IC 50 0.19 ± 0.03 mg/ml) compared to other extracts. Moreover, 70% EtOH extract of A. carlgreni could significantly suppress the nitric oxide (NO) production in lipopolysaccharide-induced RAW 264.7. All extracts treated under 400 μg/ml have no cytotoxic effects on RAW 264.7 macrophages. In the antibacterial test, both 70% EtOH extracts of C. papposus japonicus and H. glacialis showed a significant antibacterial effect on Staphylococcus aureus. The MIC values were evaluated at 256 and 512 μg/ml, respectively. Conclusions: These results suggested the bioactive potentials of marine invertebrates from the East Sea of South Korea in pharmaceutical and nutraceutical applications.

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Dissolved Oxygen and Nutrients

Cited by 5 publications

References 53 publications

Annual New Production of Phytoplankton Estimated from MODIS-Derived Nitrate Concentration in the East/Japan Sea

Annual New Production of Phytoplankton Estimated from MODIS-Derived Nitrate Concentration in the East/Japan Sea

Random forest method for enhancing stroke diagnosis accuracy in comparison with naive bayes

Chemical compositions and biological activities of marine invertebrates from the East Sea of South Korea

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