||Possible Effects of Organochlorine Pesticides on Primary Productivity and Skeletogenesis of New England Estuarine and Coastal Marine Algae.
Sear, James R. ;
Yentsc, Charles ;
||Massachusetts Univ., Amherst. Water Resources Research Center.
||DI-14-31-0001-3221; OWRR-A-035-MASS; 09653,; A-035-MASS(1)
( Algae ;
( Chlorine organic compounds ;
( Photosynthesis ;
( Water pollution ;
Chlorine organic ompounds) ;
Primary biological productivity ;
Tracer studies ;
Labeled substances ;
Carbon 14 ;
Water flow ;
Water pollution effects(Plants)
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||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.
|NTIS Title Notes
||Project completion rept., Sep 70-30 Jun 71.
|PUB Date Free Form
||14 Feb 72,
||6F; 8A; 13B; 57H; 78A; 68D
||PC A02/MF A01