| benthic cyanobacteria (oscillatoriaceae) that produce microcystin-lr, isolated from four reservoirs in southern california. | cyanobacteria that produce the toxin microcystin have been isolated from many parts of the world. most of these organisms are planktonic; however, we report on several microcystin-producing benthic filamentous cyanobacterial isolates from four drinking-water reservoirs in southern california (usa): lake mathews, lake skinner, diamond valley lake (dvl), and lake perris. some samples of benthic material from these reservoirs tested positive for microcystin by an elisa tube assay, and all the posit ... | 2007 | 17126876 |
| arsenic(iii) fuels anoxygenic photosynthesis in hot spring biofilms from mono lake, california. | phylogenetic analysis indicates that microbial arsenic metabolism is ancient and probably extends back to the primordial earth. in microbial biofilms growing on the rock surfaces of anoxic brine pools fed by hot springs containing arsenite and sulfide at high concentrations, we discovered light-dependent oxidation of arsenite [as(iii)] to arsenate [as(v)] occurring under anoxic conditions. the communities were composed primarily of ectothiorhodospira-like purple bacteria or oscillatoria-like cya ... | 2008 | 18703741 |
| geosmin and mib events in a new reservoir in southern california. | diamond valley lake is a large drinking water reservoir in western riverside county, california near the city of hemet. in almost 6 years since filling began in 1999, this reservoir has experienced five episodes involving either geosmin or 2-methylisoborneol (mib). the first one was a short-lived but intense geosmin event in may 2000, associated with a planktonic cyanobacterium, anabaena circinalis. geosmin levels reached 750 ng/l at the surface. all the other episodes involved benthic prolifera ... | 2007 | 17489388 |