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Light availability rather than Fe controls the magnitude of massive phytoplankton bloom in the Amundsen Sea polynyas, Antarctica

Cited 33 time in wos
Cited 35 time in scopus

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dc.contributor.authorPark, Jisoo-
dc.contributor.authorMaxim Y. Gorbunov-
dc.contributor.authorPaul G. Falkowski-
dc.contributor.authorLee, Sang H.-
dc.contributor.authorYang, Eun Jin-
dc.contributor.authorBenjamin Bailleul-
dc.contributor.authorFedor I. Kuzminov-
dc.coverage.spatialAmundsen Sea-
dc.coverage.spatialAntarctica-
dc.coverage.spatialPine Island Glacier ice shelf-
dc.coverage.spatialSouthern Ocean-
dc.date.accessioned2018-03-20T13:37:15Z-
dc.date.available2018-03-20T13:37:15Z-
dc.date.issued2017-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/6000-
dc.description.abstractAmundsen Sea polynyas are among the most productive, yet climate-sensitive ecosystems in the Southern Ocean and host massive annual phytoplankton blooms. These blooms are believed to be controlled by iron fluxes from melting ice and icebergs and by intrusion of nutrient-rich Circumpolar Deep Water, however the interplay between iron effects and other controls, such as light availability, has not yet been quantified. Here, we examine phytoplankton photophysiology in relation to Fe stress and physical forcing in two largest polynyas, Amundsen Sea Polynya (ASP) and Pine Island Polynya (PIP), using the combination of highresolution variable fluorescence measurements, fluorescence lifetime analysis, photosynthetic rates, and Feenrichment incubations. These analyses revealed strong Fe stress in the ASP, whereas the PIP showed virtually no signatures of Fe limitation. In spite of enhanced iron availability in the PIP, chlorophyll biomass remained 30?50% lower than in the Fe-stressed ASP. This apparent paradox would not have been observed if iron were the main control of phytoplankton bloom in the Amundsen Sea. Long-term satellite-based climatology records revealed that the ASP is exposed to significantly higher solar irradiance levels throughout the summer season, as compared to the PIP region, suggesting that light availability controls the magnitude of phytoplankton blooms in the Amundsen Sea. Our data suggests that higher Fe availability (e.g., due to higher melting rates of ice sheets) would not necessarily increase primary productivity in this region. Furthermore, stronger wind-driven vertical mixing in expanding ice-free areas may lead to reduction in light availability and productivity in the future.-
dc.languageEnglish-
dc.subjectMarine & Freshwater Biology-
dc.subjectOceanography-
dc.titleLight availability rather than Fe controls the magnitude of massive phytoplankton bloom in the Amundsen Sea polynyas, Antarctica-
dc.title.alternative광조건이 철분공급보다 남극 아문젠해 식물플랑크톤 거대번성에 더 주요 요인임에 대한 연구-
dc.typeArticle-
dc.identifier.bibliographicCitationPark, Jisoo, et al. 2017. "Light availability rather than Fe controls the magnitude of massive phytoplankton bloom in the Amundsen Sea polynyas, Antarctica". <em>LIMNOLOGY AND OCEANOGRAPHY</em>, 62(5): 2260-2276.-
dc.citation.titleLIMNOLOGY AND OCEANOGRAPHY-
dc.citation.volume62-
dc.citation.number5-
dc.identifier.doi10.1002/lno.10565-
dc.citation.startPage2260-
dc.citation.endPage2276-
dc.description.articleClassificationSCI-
dc.description.jcrRateJCR 2015:6.557-
dc.subject.keywordAmundsen Sea polynyas-
dc.subject.keywordlight availability-
dc.subject.keywordphytoplankton bloom-
dc.identifier.localId2017-0151-
dc.identifier.scopusid2-s2.0-85018657621-
dc.identifier.wosid000410726500030-
Appears in Collections  
2017-2017, Ocean-to-Ice Interactions in Amundsen Sea: Ice shelf melting and its impact on ocean processes (17-17) / Lee, SangHoon (PE17060)
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