Related Experiment Video
Updated: Aug 7, 2026
10:43
Unraveling the Unseen Players in the Ocean - A Field Guide to Water Chemistry and Marine Microbiology
Published on: November 5, 2014
[Study of sea water pollution by determining the mutagenic activity of sediments]
Eksperimental'Naia Onkologiia
|January 1, 1987
Abstract:
Extracts from bottom sediments sampled in the Bering Sea and in certain regions of the Pacific Ocean were studied. Benzene and acetone-hexane extracts were tested for mutagenicity by Ames' bacterial test-system using the TA 98 and TA 100 Salmonella typhimurium strains. Extract from 4 stations of the 10 studied ones produced significant increase in the number of revertants. The experiments conducted permit drawing a conclusion on the probable distribution of mutagenic and carcinogenic activity zones in the ocean.
Related Concept Videos
01:30Marine Microbial Ecology
Marine microbial ecosystems are shaped by distinct physicochemical limits, including high salinity, low nutrient availability, and fluctuating oxygen levels. These conditions favor smaller microbial cell sizes, which maximize their surface-to-volume ratio for efficient nutrient uptake.Microbial activity and community composition are closely linked to biogeochemical cycles, particularly in dynamic environments like estuaries, where halotolerant microbes thrive in response to variable salinity...
01:30Microbial Wastewater Treatment
Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.