. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. Southern California hydrozoan 207 February preceded a bloom of Enteromorpha during January- March. The mat creates a shaded sheher for the medusae suggestive of that under the broad Zostera blades. Closely following the rise and decline of Enteromorpha, medusae, including many gravid in- dividuals, appeared during February-April (Fig. 1). Furthermore, 2,23^ DATE: , 1965 Figure 1. Occurrence of Gonionernus medusae (stippled blocks) re
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. Southern California hydrozoan 207 February preceded a bloom of Enteromorpha during January- March. The mat creates a shaded sheher for the medusae suggestive of that under the broad Zostera blades. Closely following the rise and decline of Enteromorpha, medusae, including many gravid in- dividuals, appeared during February-April (Fig. 1). Furthermore, 2,23^ DATE: , 1965 Figure 1. Occurrence of Gonionernus medusae (stippled blocks) relative to forma- tion of surface algal mats of Enteromorpha (hatched blocks), compared with variations in physical and chemical parameters in the U. C. S. B. campus lagoon during February-April, 1965. medusae inhabiting the Enteromorpha mats that declined first, vanished first, with dead and moribund individuals observable in the fading mats. Conversely, vigorous mats continued to support healthy medusae. When the mats disintegrate, medvisae are not only critically exposed, but presumably are subjected to unhealthy pollu- tion in the decaying algae, which is indicated by near-anoxic ben-. 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 Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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