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OLS Field Name OLS Field Data
Main Title Fluorescence Assessment of the Maximum Quantum Efficiency of Photosynthesis in the Western North Atlantic.
Author Geider, R. J. ; Greene, R. M. ; Kolber, Z. ; MacIntyre, H. L. ; Falkowski, P. G. ;
CORP Author Delaware Univ., Lewes. Coll. of Marine Studies. ;Brookhaven National Lab., Upton, NY. Oceanographic and Atmospheric Sciences Div.;Environmental Protection Agency, Narragansett, RI. Environmental Research Lab.;Department of Energy, Washington, DC.;National Science Foundation, Arlington, VA.
Publisher c1993
Year Published 1993
Report Number DE-AC02-76CH00016, NSF-OCE89-15084; EPA/600/J-94/220 ; ERLN-X201
Stock Number PB94-169950
Additional Subjects Plant ecology ; Phytoplankton ; Fluorescence ; Photosynthesis ; Marine biology ; Atlantic Ocean ; Nutrients ; Aquatic ecosystems ; Quantum efficiency ; Reprints ;
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NTIS  PB94-169950 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 09/01/1994
Collation 21p
Abstract The maximum quantum efficiency (phiII) of phytoplankton photosystem II photochemistry was assessed using a pump and probe fluorometer on an offshore-onshore transect from the oligotrophic blue waters of the western Sargasso Sea to the eutrophic waters of lower Delaware Bay. Low values of the ratio of variable to maximum fluorescence (Fv/Fm) of dark adapted samples provided evidence for reduced quantum efficiences in surface waters (z = 10 m) of the Sargasso Sea. In contrast, higher values of Fv/Fm in estuarine samples indicated near maximal phiII in lower Delaware Bay, with intermediate values of Fv/Fm observed over the continental shelf. Variations of Fv/Fm in surface samples (5 or 10 m depth) were associated with changes in hydrographic features that were consistent with the hypothesis that reduced values of phiII in Sargasso Sea surface waters were due to nutrient limitation of phytoplankton photosynthetic energy conversion.
Supplementary Notes Pub. in Deep-Sea Research I, v40 n6 p1205-1224, 1993. See also PB93-204923. Prepared in cooperation with Brookhaven National Lab., Upton, NY. Oceanographic and Atmospheric Sciences Div. Sponsored by Environmental Protection Agency, Narragansett, RI. Environmental Research Lab., Department of Energy, Washington, DC., and National Science Foundation, Arlington, VA.
NTIS Title Notes Journal article.
Title Annotations Reprint: Fluorescence Assessment of the Maximum Quantum Efficiency of Photosynthesis in the Western North Atlantic.
Category Codes 68D; 47D; 57H
NTIS Prices PC A03/MF A01
Primary Description 600/05
Document Type NT
Cataloging Source NTIS/MT
Control Number 418226477
Origin NTIS
Type CAT