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Photosynthesis of Cladophora in Relation to Light and CO2 Limitation CaCO3 Precipitation
Author(s) -
Wood Kenneth G.
Publication year - 1975
Publication title -
ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.144
H-Index - 294
eISSN - 1939-9170
pISSN - 0012-9658
DOI - 10.2307/1934980
Subject(s) - cladophora , photosynthesis , precipitation , algae , botany , biology , shading , productivity , ecology , meteorology , art , physics , macroeconomics , economics , visual arts
In productivity studies of Cladophora by the light—and—dark—bottle method, errors may arise from CaCo 3 precipitation, self—shading, pH/Co 2 limitation, or variations in the condidtion of the alga. Precipitation of CaCo 3 and MgCo 3 by Cladophora may equal one—third of production at pH 9.3 to 10.4, resulting in overestimation of photosynthesis by either the 1 4 C or pH method. The calcification is readily removed by acid rinse without loss of fixed carbon. Consideration of such errors in relation to a recent study leads to the refutation of the conclusion the Cladophora shows an unusual ability to utilize low light intensities.