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Structure and Function of Microorganisms in Seasonal Sea Ice |
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| $B8&5fL\E*(B | Photoacclimation of ice algae community is one of the most distinct response to the low light intensity in the high latitude. Few detailed study has been made for the analyses of photosynthetic response characterized by the electron transport rate of Photosystem II because the methodology has not been established yet for the ice alage analysis. The methodology and experimental protocols are aimed to be established in the present study. |
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| $B8&5fFbMF!&@.2L(B | In 2009$B!$(B ice season of Saroma-ko Lagoon$B!$(B the ice was developed as usual to about 40cm ice thickness. The in situ incubation experiment with the ice algae community was conducted for a complete 24hr from the dawn at the undersurface of sea ice. Another sets of sampling was also conducted at four corners of 1$B-V(B surface area of sea ice to study the spatial variability in the photosynthetic characteristics. The lower maximum fluorescence efficiency of Photosystem II (Fv/Fm) in Saroma-ko than those in the high Arctic regions may suggest an immature photoacclimation in a shallow sea ice ecosystem. Even Fv/Fm values were low$B!$(B Fv/Fv indicates less spatial variability within 1$B-V(B area but high spatial variability in the ice algae biomass. |
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Obata$B!$(B M. and S. Taguchi (2009) Photoacclimation of an ice algae community in thin sea ice$B!$(B Saroma-ko Lagoon$B!$(B Hokkaido$B!$(B Japan. Polar Biology 32:1127-1135 Takimoto$B!$(BK.$B!$(B M. Obata$B!$(B A. Murata$B!$(B S. Motokawa$B!$(B and S. Taguchi$B!!!!(B(2010) Spatial variability in photosynthetic characteristics of ice algae in Saroma-ko Lagoon$B!$(B Hokkaido. Proceedings of NIPR$B!$(B Biology$B!$(B pp.2-3 November 30 to December 3$B!$(B 2010$B!$(B Tokyo$B!$(B Japan |
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