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Blooms of surf‐zone diatoms along the coast of the Olympic Peninsula, Washington. 7. Variations of the carbon‐to‐nitrogen ratio in field samples and laboratory cultures of Chaetoceros armatum 1, 2
Author(s) -
Collos Yves,
Lewin Joyce
Publication year - 1976
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1976.21.2.0219
Subject(s) - chaetoceros , diatom , algae , nitrogen , oceanography , surf zone , nitrate , environmental science , irradiance , carbon fibers , phytoplankton , botany , nutrient , biology , ecology , chemistry , geology , physics , materials science , organic chemistry , quantum mechanics , composite number , composite material
Carbon: nitrogen ratios in particulate matter collected from the surf at Copalis Beach, Washington, from April to September 1972 ranged between 5.0 (April, May) and 11.2 (July). They were considered characteristic of living algae in the surf, mainly the diatom species Chaetoceros armatum. The high ratio in summer could result from a slower growth rate of the diatoms or increased irradiance. The relationship between nitrate reductase (NR) activity and C : N ratios in surf samples and laboratory cultures was also investigated. In exponentially growing cultures of C. armatum C : N ratios varied from 4.2 to 13.5, depending on culture conditions.