Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Possible Effects of Organochlorine Pesticides on Primary Productivity and Skeletogenesis of New England Estuarine and Coastal Marine Algae.
Author Sear, James R. ; Yentsc, Charles ;
CORP Author Massachusetts Univ., Amherst. Water Resources Research Center.
Year Published 1972
Report Number DI-14-31-0001-3221; OWRR-A-035-MASS; 09653,; A-035-MASS(1)
Stock Number PB-210 146
Additional Subjects ( Algae ; Ecology) ; ( Chlorine organic compounds ; Ecology) ; ( Photosynthesis ; Algae) ; ( Water pollution ; Chlorine organic ompounds) ; Estuaries ; DDT ; Pesticides ; Primary biological productivity ; Tracer studies ; Labeled substances ; Carbon 14 ; Water flow ; Ulva ; Rhodymenia ; Fucus ; Water pollution effects(Plants)
Library Call Number Additional Info Location Last
NTIS  PB-210 146 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 14p
Techniques have been developed to estimate rates of photosynthesis in macroscopic marine algae by monitoring oxygen production. Attempts to use 14C techniques were unsuccessful, because of the difficulty of recovering assimilated 14C by maceration, acid hydrolysis and strong base solubilization of thalli. Photosynthesis by macroscopic algae was strongly influenced by water movement. Under conditions of standing water, oxygen production decreased to a fraction of oxygen production in a stirred system. The effect of DDT on photosynthesis of Rhodymenia, Fucus and Ulva could not be consistently demonstrated. If any effect did occur, its magnitude was below the level of detection because of the photosynthetic variability among plants. These findings are in contrast to the pronounced effects of DDT on phytoplankton photosynthesis reported previously.