Colonization of sulfide‐oxygen interfaces on hot spring tufa byThermothrix thiopara
作者:
DouglasE. Caldwell,
ThomasL. Kieft,
DanielK. Brannan,
期刊:
Geomicrobiology Journal
(Taylor Available online 1984)
卷期:
Volume 3,
issue 3
页码: 181-200
ISSN:0149-0451
年代: 1984
DOI:10.1080/01490458409377797
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Cream‐colored streamers ofThermothrix thioparawere found at the sulfide‐oxygen interfaces of active tufa mounds where reducing geothermal groundwaters mixed with the oxidizing atmosphere. In the Jemez hot springs, the molar ratio of sulfide to oxygen was 0.3 to 0.8 at streamer locations within the interface. This corresponded to the optimum stoichiometric proportion (0.5) necessary for sulfur metabolism. The mechanism of cell positioning at the interface was studied by shifting the interface location with a plastic cover to extend reducing conditions from the mouth of the spring to the edge of the plastic. Macroscopically visible streamers of filamentous cells became established at the new interface within a period of eight days. They could then be reestablished at the original interface by removing the cover.
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