. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. MARINE ENVIRONMENT OFF SAN ELIJO LAGOON 99 We anticipate an increase in the sea urchin population and a decrease in kelp density once the outfall becomes operative. Apparently the urchins can tolerate effluent-rich areas while the kelp is adversely affected. Urchin-favored environments are apparent near the White Point outfall (Palos Verdes Peninsula) and in areas near the Point Loma outfall. On April 14, our last field day, temperat
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. MARINE ENVIRONMENT OFF SAN ELIJO LAGOON 99 We anticipate an increase in the sea urchin population and a decrease in kelp density once the outfall becomes operative. Apparently the urchins can tolerate effluent-rich areas while the kelp is adversely affected. Urchin-favored environments are apparent near the White Point outfall (Palos Verdes Peninsula) and in areas near the Point Loma outfall. On April 14, our last field day, temperatures ranged from °C at 80 feet to °C at the surface and water clarity was reduced to zero by a heavy plankton (dinoflagellate) bloom. Over 90 percent of the organisms in the sampled water were Ceratium sp.; the remainder were Noctiluca sp. and Gonyaulax sp. These dinoflagellates caused the ocean to assume a rusty-brown color. During earlier surveys, water temperatures had ranged from °C (80 foot depth) to °C at the surface and water visibilities varied from 9 to 30 feet (Figure 16). An ocean outfall in this area poses a potential threat to the lush biological assemblages. However, strict water quality criteria for dis- charged effluent will reduce this potential threat. To evaluate and 10 1 1 ! 1 1 1 1 VISIBILITY STATION 1 MARCH 9,1964 1 1 I 1 x. *** *â « i r i 20 - 15 20 30 40 DEPTH, FEET 50 60 70 10 t 80 u ^ a. 5 STATION 5 MARCH 12,1964 T 13 L _L TEMPERATURE VISIBILITY. 20 20 DEPTH,FEET 25 30 35 3 a. 2 13 12 TEMPERATURE VISIBILITY STATION 8 MARCH 26,1964 JL I _L 40 30 10 20 30 50 60 40 DEPTH,FEET FIGURE 16. Temperature-visibility curves as functions of depth. 70 80. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original California. Dept. of Fish and Game; California. Fish and Gam
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