Formation of pharmacosiderite (KFe4(AsO4)3(OH)4·6-7H2O) in the acid-sulfate-chloride (ASC) geothermal spring, Norris Geyser Basin, Yellowstone National Park, USA: Implication of Fe and As redox reaction associated with microbe and clay minerals

ABSTRACT An arsenite-oxidizing Hydrogenobaculum strain was isolated from a geothermal spring in Yellowstone National Park, Wyo., that was previously shown to contain microbial populations engaged in arsenite oxidation. The isolate was sensitive to both arsenite and arsenate and behaved as an obligate chemolithoautotroph that used H2 as its sole energy source and had an optimum temperature of 55 to 60Ã¯Â¿Â½C and an optimum pH of 3.0. The arsenite oxidation in this organism displayed saturation kinetics and was strongly inhibited by H2S.

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CYANIDIA (CYANIDIALES) POPULATION DIVERSITY AND DYNAMICS IN AN ACID-SULFATE-CHLORIDE SPRING IN YELLOWSTONE NATIONAL PARK

Journal of Phycology ◽

10.1111/j.1529-8817.2006.00293.x ◽

2007 ◽

Vol 43 (1) ◽

pp. 3-14 ◽

Cited By ~ 21

Author(s):

Corinne R. Lehr ◽

Shaun D. Frank ◽

Tracy B. Norris ◽

Seth D'Imperio ◽

Alexey V. Kalinin ◽

...

Keyword(s):

Yellowstone National Park ◽

National Park ◽

Population Diversity ◽

Acid Sulfate

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Sulfur geochemistry of hydrothermal waters in Yellowstone National Park: IV Acid–sulfate waters

Applied Geochemistry ◽

10.1016/j.apgeochem.2008.11.019 ◽

2009 ◽

Vol 24 (2) ◽

pp. 191-207 ◽

Cited By ~ 81

Author(s):

D. Kirk Nordstrom ◽

R. Blaine McCleskey ◽

James W. Ball

Keyword(s):

Yellowstone National Park ◽

National Park ◽

Acid Sulfate

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Ultrastructural Localization of Phycocyanin in the Acidophilic, Thermophilic Alga, Cyanidium Caldarium

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100072757 ◽

1973 ◽

Vol 31 ◽

pp. 462-463

Author(s):

M. R. Edwards ◽

J. D. Mainwaring

Keyword(s):

Yellowstone National Park ◽

National Park ◽

Ultrastructural Localization ◽

Review Of Literature ◽

Cyanidium Caldarium ◽

Taxonomic Rank ◽

Thin Sections ◽

Standard Methods ◽

Laboratory Cultures

Although the general ultrastructure of Cyanidium caldarium, an acidophilic, thermophilic alga of questionable taxonomic rank, has been extensively studied (see review of literature in reference 1), some peculiar ultrastructural features of the chloroplast of this alga have not been noted by other investigators.Cells were collected and prepared for thin sections at the Yellowstone National Park and were also grown in laboratory cultures (45-52°C; pH 2-5). Fixation (glutaraldehyde-osmium), dehydration (ethanol), and embedding (Epon 812) were accomplished by standard methods. Replicas of frozenfracture d- etched cells were obtained in a Balzers apparatus. In addition, cells were examined after disruption in a French Press.

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