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In Situ Rates of Carbon and Nitrogen Uptake by Phytoplankton and the Contribution of Picophytoplankton in Kongsfjorden, Svalbard

Cited 4 time in wos
Cited 4 time in scopus

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dc.contributor.authorKim, Bo Kyung-
dc.contributor.authorJoo, Hyoung Min-
dc.contributor.authorJung, Jinyoung-
dc.contributor.authorLee, Boyeon-
dc.contributor.authorHa, Sun-Yong-
dc.date.accessioned2021-05-17T07:43:35Z-
dc.date.available2021-05-17T07:43:35Z-
dc.date.issued2020-10-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/12055-
dc.description.abstractRapid climate warming and the associated melting of glaciers in high-latitude open fjord systems can have a significant impact on biogeochemical cycles. In this study, the uptake rates of carbon and nitrogen (nitrate and ammonium) of total phytoplankton and picophytoplankton (<2 mu m) were measured in Kongsfjorden in early May 2017 using the dual stable isotope technique. The daily uptake rates of total carbon and nitrogen ranged from 0.3 to 1.1 g C m(-2) day(-1), with a mean of 0.7 +/- 0.3 g C m(-2) day(-1), and 0.13 to 0.17 g N m(-2) day(-1), with a mean of 0.16 +/- 0.02 g N m(-2) day(-1). Microphytoplankton (20-200 mu m) accounted for 68.1% of the total chlorophyll a (chl-a) concentration, while picophytoplankton (<2 mu m) accounted for 19.6% of the total chl-a, with a high contribution to the carbon uptake rate (42.9%) due to its higher particulate organic carbon-to-chl-a ratio. The contributions of picophytoplankton to the total nitrogen uptake rates were 47.1 +/- 10.6% for nitrate and 74.0 +/- 16.7% for ammonium. Our results indicated that picophytoplankton preferred regenerated nitrogen, such as ammonium, for growth and pointed to the importance of the role played by picophytoplankton in the local carbon uptake rate during the early springtime in 2017. Although the phytoplankton community, in terms of biovolume, in all samples was dominated by diatoms and Phaeocystis sp., a higher proportion of nano- and picophytoplankton chl-a (mean +/- SD = 71.3 +/- 16.4%) was observed in the relatively cold and turbid surface water in the inner fjord. Phytoplankton production (carbon uptake) decreased towards the inner fjord, while nitrogen uptake increased. The contrast in carbon and nitrogen uptake is likely caused by the gradient in glacial meltwater which affects both the light regime and nutrient availability. Therefore, global warming-enhanced glacier melting might support lower primary production (carbon fixation) with higher degrees of regeneration processes in fjord systems.en_US
dc.languageEnglishen_US
dc.language.isoen_USen_US
dc.subjectEnvironmental Sciences & Ecologyen_US
dc.subjectWater Resourcesen_US
dc.subject.classificationDasan Stationen_US
dc.titleIn Situ Rates of Carbon and Nitrogen Uptake by Phytoplankton and the Contribution of Picophytoplankton in Kongsfjorden, Svalbarden_US
dc.title.alternativeKongsfjorden지역의 식물플랑크톤의 탄소 및 질소섭취율과 Pico크기의 식물플랑크톤 기여도 파악en_US
dc.typeArticleen_US
dc.identifier.bibliographicCitationKim, Bo Kyung, et al. 2020. "In Situ Rates of Carbon and Nitrogen Uptake by Phytoplankton and the Contribution of Picophytoplankton in Kongsfjorden, Svalbard". <em>WATER</em>, 12(10): 2903-2924.-
dc.citation.titleWATERen_US
dc.citation.volume12en_US
dc.citation.number10en_US
dc.identifier.doi10.3390/w12102903-
dc.citation.startPage2903en_US
dc.citation.endPage2924en_US
dc.description.articleClassificationSCIE-
dc.description.jcrRateJCR 2018:31.868en_US
dc.subject.keywordphytoplankton productivityen_US
dc.subject.keywordcarbon and nitrogenen_US
dc.subject.keywordstable isotopesen_US
dc.subject.keywordKongsfjordenen_US
dc.subject.keywordSvalbarden_US
dc.identifier.localId2020-0156-
dc.identifier.scopusid2-s2.0-85095968897-
dc.identifier.wosid000586177100001-
Appears in Collections  
2017-2018, Carbon assimilation rate of sea ice ecosystem in the Kongsfjorden MIZ, Arctic (17-18) / Ha, Sun-Yong (PE17170, PE18170)
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