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Photophysiological Evidence Of Nutrient Limitation Of Platelet Ice Algae In Mcmurdo Sound, Antarctica by Dale H. Robinson; Kevin R. Arrigo; Zbigniew Kolber; Michel Gosselin; Cornelius W. Sullivan is a Earth and Planetary Sciences article available to read on EtoBox.

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Seasonally changing photophysiological and biochemical characteristics of sea ice microalgae are interpreted with respect to light availability and measurements of nutrient concentration made at high vertical resolution (12.5 cm) during a dense bloom in the platelet ice layer of McMurdo Sound during a 6-week study in austral spring of 1989. Platelet ice algae remained highly shade adapted throughout the spring as shown by their low photoadaptive index (E k , 3.7-8.4 mol photons•m Ϫ2 •s Ϫ1 ), low mean specific absorption coefficient (Ͻ0.009 m 2 mg Ϫ1 Chl a), high optical cross-sectional area of photosystem II ( PSII, 3.0-8.2), and high molar ratio of fucoxanthin:chlorophyll a (mean ϭ 1.62 Ϯ 0.15 SD). Between 24 October and 8 November, the algae exhibited a photoacclimative response that was marked by a 30% decrease in photosynthetic efficiency (␣ B ), a 75% decrease in maximum photosynthetic rate (P ), and a 60% increase in PSII . The photochemical B m conversion efficiency at photosystem II (F v /F m ϭ ca. 0.5) and the quantum yield of photosynthesis (Ø C ϭ 0.062-0.078 mol C mol Ϫ1 photons) were ca. 80% of their maximal values. After 8 November, changes in algal photophysiology and

Who reads Photophysiological Evidence Of Nutrient Limitation Of Platelet Ice Algae In Mcmurdo Sound, Antarctica?

Author

Dale H. Robinson; Kevin R. Arrigo; Zbigniew Kolber; Michel Gosselin; Cornelius W. Sullivan

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0022-3646)

Published

1998

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)