| molecular characterization of the diversity and distribution of a thermal spring microbial community by using rrna and metabolic genes. | the diversity and distribution of a bacterial community from coffee pots hot spring, a thermal spring in yellowstone national park with a temperature range of 39.3 to 74.1 degrees c and ph range of 5.75 to 6.91, were investigated by sequencing cloned pcr products and quantitative pcr (qpcr) of 16s rrna and metabolic genes. the spring was inhabited by three aquificae genera--thermocrinis, hydrogenobaculum, and sulfurihydrogenibium--and members of the alpha-, beta-, and gammaproteobacteria, firmic ... | 2008 | 18539788 |
| microscopic physical biomarkers in carbonate hot springs: implications in the search for life on mars. | physical evidence of life (physical biomarkers) from the deposits of carbonate hot springs were documented at the scale of microorganisms--submillimeter to submicrometer. the four moderate-temperature (57 to 72 degrees c), neutral ph springs reported on in this study, support diverse communities of bacteria adapted to specific physical and chemical conditions. some of the microbes coexist with travertine deposits in endolithic communities. in other cases, the microbes are rapidly coated and dest ... | 2000 | 11543582 |
| thermothrix thioparus gen. et sp. nov. a facultatively anaerobic facultative chemolithotroph living at neutral ph and high temperature. | thermothrix thioparus gen. et ep. nov. occurs naturally in a new mexico hot spring at a temperature of 74 degrees c, a ph of 7.0, and a hs- concentration of 1 mg/litre. the organism is gram-negative, non-motile, 0.5-1.0 x 3-20 mum, and forms cell chains up to 1 cm in length. the resulting filaments do not possess a sheath. sulfur is deposited extracellularly. the organism was isolated using an autotrophic medium with hs- as the energy source and no3- as the terminal electron acceptor. anaerobica ... | 1976 | 10063 |