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Satellite thermal imagery is combined with automated chemical analysis of surface waters off central California to detect and better understand a 'nutrient upwelling' entering the California Current system. While thermal surface water features have been mapped successfully from satellites for a number of years, the relationship of satellite thermal imagery to nutrients, such as nitrates and phosphates, has not been established. As a result of such efforts, satellite remote sensors may help to explain the relationship between chemical mesoscale and pelagic ecosystems of the ocean.

Merkel, Joseph R. (Fort Johnson Marine Biological Laboratory, College of Charleston, Charleston, S.C.), Eugene D. Traganza, Barid B. Mukherjee, Travis B. Griffin, and J. M. Prescott . Proteolytic activity and general characteristics of a marine bacterium, Aeromonas proteolytica sp. n. J. Bacteriol. 87: 1227–1233. 1964.—A highly proteolytic bacterial species was isolated from the alimentary canal of the marine borer, Limnoria . The morphological and biochemical characteristics of the organism indicated that it was a new Aeromonas species, for which the name A. proteolytica is proposed. When freshly isolated, the organism required seawater for growth; but, upon prolonged culture in the laboratory, it was able to grow in media of greatly reduced salt concentration, provided that relatively large amounts of peptone were supplied. Peptone or hydrolysates of casein were capable of supplying all organic nutrients required for growth and proteinase production. Certain individual amino acids were also able to furnish all energy, carbon, and nitrogen requirements. Inorganic nitrogen was utilized in the presence of citrate, but could not serve as the only source of nitrogen in the presence of glucose. The organism was facultatively anaerobic, but best growth and proteinase production occurred only with vigorous aeration. The amount of growth obtained in 24 hr increased rapidly as the incubation temperature was increased up to a maximum of 40 C, but no growth occurred at 42 C.