Light utilization and photoinhibition of photosynthesis in marine phytoplankton

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Introduction to Phytoplankton. Based on the record of the oldest identifiable fossils, the first oxygenic photosynthetic organisms appeared about 2 {times} l0{sup 9} years ago in the form of marine single celled, planktonic procaryotes (Riding, 1992; Sarmiento and Bender, 1993). In the intervening eons, phytoplankton have evolved and diversified; presently they represent at least 11 classes of procaryotic and euacaryotic photoautotrophs. While the carbon of these organisms cumulatively amounts to only 1 to 2% of the global plant biomass, they fix between 35 and 50 gigatonnes ({times} 10{sup 9} metric tons) of carbon annually, about 40% of the global total ... continued below

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49 p.

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Falkowski, P.G., Greene, R., Kolber, Z. December 31, 1993.

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Description

Introduction to Phytoplankton. Based on the record of the oldest identifiable fossils, the first oxygenic photosynthetic organisms appeared about 2 {times} l0{sup 9} years ago in the form of marine single celled, planktonic procaryotes (Riding, 1992; Sarmiento and Bender, 1993). In the intervening eons, phytoplankton have evolved and diversified; presently they represent at least 11 classes of procaryotic and euacaryotic photoautotrophs. While the carbon of these organisms cumulatively amounts to only 1 to 2% of the global plant biomass, they fix between 35 and 50 gigatonnes ({times} 10{sup 9} metric tons) of carbon annually, about 40% of the global total (Falkowski and Woodhead, 1992). On average, each gram of phytoplankton chlorophyll converts about 6% of the photosynthetically active radiation (440 to 700 nm) incident on the sea surface to photochemical energy (Morel, 1978). Despite a great deal of variability in ocean environments, this photosynthetic conversion efficiency is relatively constant for integrated water column production (Morel, 1978; Falkowski, 1981; Platt, 1986; Morel, 1991). Here we review the factors determining light utilization efficiency of phytoplankton in the oceans, and the physiological acclimations which have evolved to optimize light utilization efficiency.

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49 p.

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OSTI as DE94005505

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  • 41. Harden conference on photoinhibition of photosynthesis, London (United Kingdom), 5-10 Sep 1993

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  • Other: DE94005505
  • Report No.: BNL--49821
  • Report No.: CONF-9309312--1
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 143948
  • Archival Resource Key: ark:/67531/metadc619918

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • December 31, 1993

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  • June 16, 2015, 7:43 a.m.

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  • Aug. 8, 2016, 8:46 p.m.

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Falkowski, P.G., Greene, R., Kolber, Z. Light utilization and photoinhibition of photosynthesis in marine phytoplankton, article, December 31, 1993; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc619918/: accessed November 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.