High abundance of protein-like fluorescence in the Amerasian Basin of Arctic Ocean: Potential implication of a fall phytoplankton bloom
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- High abundance of protein-like fluorescence in the Amerasian Basin of Arctic Ocean: Potential implication of a fall phytoplankton bloom
- Other Titles
- 북극 아메라시아 분지에서 고동노의 단백질 유사 형상물질: 가을 식물성 플랑크톤 번성의 잠재적 의미
- Meilian Chen
- Environmental Sciences & Ecology
- Arctic Ocean; Dissolved organic matter; Ecitation-emission matrix; Fall phytoplankton bloom
- Issue Date
- Meilian Chen, et al. 2017. "High abundance of protein-like fluorescence in the Amerasian Basin of Arctic Ocean: Potential implication of a fall phytoplankton bloom". SCIENCE OF THE TOTAL ENVIRONMENT, 599-600(0): 355-363.
- The seawater samples fromthe Chukchi and East Siberian Seaswere collected along a shelf-slope-basin gradient and analyzed for chromophoric and fluorescent DOM(i.e., CDOMand FDOM, respectively). Unexpected high protein- like FDOM (0.35 ± 0.40 and 0.24 ± 0.34 RU for peaks B and T, respectively) levels were identified, which corresponded to 1？2 orders of magnitude higher than those documented by previous reports. This unique phenomenon could be attributed to a fall phytoplankton bloom. The seawater chl-a data, estimated fromin situ fluorescence measurements and satellite remote sensing data, showed the subsurface chl-a maximum of up to 1.52 mg m？3 at ~25？70 m depths and the surface monthly average values (August 2015) up to 0.55 to 0.71 mg m？3, which fall in the range of ~0.5？2.0 mg m？3 during fall phytoplankton blooms in this area. Meanwhile, the depth profile ofDOMparameters revealed subsurfacemaximaof protein-like fluorescence peaks along the shelf-slope gradient. The positive correlations between the protein-like peaks and biological index implied the lateral transport of DOM and nutrients from the shelf to the slope and basin. Despite still being a largely ice-covered environment, potential shifts in the ecosystemappear to make progress in response to changing climate in the Arctic Ocean.
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