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Title of Journal: Polar Biol

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Abbravation: Polar Biology

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Springer-Verlag

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DOI

10.1002/chin.198711351

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1432-2056

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Photoadaptation of an ice algal community in thin

Authors: Mitsuko Obata Satoru Taguchi
Publish Date: 2009/03/31
Volume: 32, Issue: 8, Pages: 1127-1135
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Abstract

We investigated the shade adaptation of a seasonally welldeveloped ice algal community in thin sea ice at SaromaKo Lagoon Hokkaido Japan on 3–4 March 2006 and 4–5 March 2007 by examining photosynthetic pigment concentrations the chlorophyll aspecific lightabsorption coefficient a ph and the lightsaturation index E k The high proportions of photosynthetic pigments including chlorophyll a fucoxanthin and chlorophyll c and the low values of a ph 440 and a ph 675 suggested that the lagoon’s ice algal community was shadeadapted The high ratio of E k to total photosynthetically active radiation PAR in the ice algal habitat suggested that the degree of shade adaptation is weak Scaling of E k to total PAR could be extended to studies of the degree of photoadaptive succession of ice algal communities in the Northern Hemisphere The degree of shade adaptation of ice algal communities in the Northern Hemisphere might be related to ice thickness regardless of latitudeThis work would have been impossible without the support provided by H Hattori Hokkaido Tokai University N Kurosawa Soka University K Hamasaki University of Tokyo and A Mizobuchi Soka University The space for fluorescence analysis and information about the sea ice conditions in SaromaKo Lagoon provided by K Maekawa Saromako Aquaculture Research Center were greatly appreciated Two anonymous reviewers provided constructive comments to improve the earlier versions of this paper This research was supported partly by the financial and logistical support of the Institute of Low Temperature Science Hokkaido University Japan for graduate research by M Obata

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