| Abstract: | Searles Lake is a salt-saturated, alkaline brine unusually rich in the toxic element arsenic. Arsenic speciation changed from arsenate [As(V)] to arsenite [As(III)] with sediment depth. Incubated anoxic sediment slurries displayed dissimilatory As(V)-reductase activity that was markedly stimulated by H2 or sulfide, whereas aerobic slurries had rapid As(III)-oxidase activity. An anaerobic, extremely haloalkaliphilic bacterium was isolated from the sediment that grew via As(V) respiration, using either lactate or sulfide as its electron donor. Hence, a full biogeochemical cycle of arsenic occurs in Searles Lake, driven in part by inorganic electron donors. |
| Genre: | Article |
| ProdID: | 70029643 |
| Citation Author: | Oremland, R. S.; Kulp, T. R.; Blum, J. S.; Hoeft, S. E.; Baesman, S.; Miller, L. G.; Stolz, J. F. |
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| Citation End Page: | 1308 |
| Citation Issue: | 5726 |
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| Citation Language: | English |
| Citation Larger Work Title: | Science |
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| Citation Number Of Pages: | 4 |
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| Citation Search Results Text: | Microbiology: A microbial arsenic cycle in a salt-saturated, extreme environment; 2005; Article; Journal; Science; Oremland, R. S.; Kulp, T. R.; Blum, J. S.; Hoeft, S. E.; Baesman, S.; Miller, L. G.; Stolz, J. F. |
| Citation Start Page: | 1305 |
| Citation Volume: | 308 |
| Citation Year: | 2005 |
| Type: | citation/reference |
| Text: | Microbiology: A microbial arsenic cycle in a salt-saturated, extreme environment; 2005; Article; Journal; Science; Oremland, R. S.; Kulp, T. R.; Blum, J. S.; Hoeft, S. E.; Baesman, S.; Miller, L. G.; Stolz, J. F. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1126/science.1110832 |
| Date Other: | Sat, 1 Jan 2005 00:00 -0600 |
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