Fe-Si biominerals in the Vilyuchinskie hot springs, Kamchatka Peninsula, Russia
The micromorphological structure of microbial mats (biomats) from the hot springs of the Vilyuchinskaya hydrothermal system, Kamchatka Peninsula, Russia, were investigated. The Vilyuchinskie hot springs had a discharge temperature of 55-56°C and Na-Ca-HCO3-type waters rich in silicic and boric acids...
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Sociedad Española de Microbiología
2004
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ftscielospain:oai:scielo:S1139-67092004000300005 2023-07-16T03:59:18+02:00 Fe-Si biominerals in the Vilyuchinskie hot springs, Kamchatka Peninsula, Russia Belkova,Natalia L. Zakharova,Julia R. Tazaki,Kazue Okrugin,Viktor M. Parfenova,Valentina V. 2004-09-01 text/html https://scielo.isciii.es/scielo.php?script=sci_arttext&pid=S1139-67092004000300005 en eng Sociedad Española de Microbiología International Microbiology v.7 n.3 2004 hot springs microbial mats biomats Fe-minerals Kamchatka Peninsula journal article 2004 ftscielospain 2023-06-23T06:55:55Z The micromorphological structure of microbial mats (biomats) from the hot springs of the Vilyuchinskaya hydrothermal system, Kamchatka Peninsula, Russia, were investigated. The Vilyuchinskie hot springs had a discharge temperature of 55-56°C and Na-Ca-HCO3-type waters rich in silicic and boric acids. Water and biomats had high concentrations of Fe, Mn, Sr, and As. Enumeration of total bacterial abundance (TBA) demonstrated a low density of bacterial populations. However, the fractions of metabolically active bacteria and respiring iron-oxidizing bacteria in the hot-spring water were high, comprising 68 and 21% of TBA, respectively. Scanning electron microscopy equipped with an energy dispersive X-ray spectrometer (SEM-EDX) showed that unicellular rod-shaped bacteria about 5-µm long predominated in the brown biomats. The mineral capsules of these bacteria contained large amounts of Fe and Si. Extracellular and intracellular particles were observed by transmission electron microscopy. Fe-oxidizing bacteria were isolated from the biomats on agar plates with selective medium. Therefore, it can be concluded that microorganisms inhabiting the biomats of the Vilyuchinskie hot springs are essential for the deposition of Fe-minerals at neutral pH. Article in Journal/Newspaper Kamchatka Kamchatka Peninsula SciELO España (Scientific Electronic Library Online) Kamchatka Peninsula ENVELOPE(160.000,160.000,56.000,56.000) |
institution |
Open Polar |
collection |
SciELO España (Scientific Electronic Library Online) |
op_collection_id |
ftscielospain |
language |
English |
topic |
hot springs microbial mats biomats Fe-minerals Kamchatka Peninsula |
spellingShingle |
hot springs microbial mats biomats Fe-minerals Kamchatka Peninsula Belkova,Natalia L. Zakharova,Julia R. Tazaki,Kazue Okrugin,Viktor M. Parfenova,Valentina V. Fe-Si biominerals in the Vilyuchinskie hot springs, Kamchatka Peninsula, Russia |
topic_facet |
hot springs microbial mats biomats Fe-minerals Kamchatka Peninsula |
description |
The micromorphological structure of microbial mats (biomats) from the hot springs of the Vilyuchinskaya hydrothermal system, Kamchatka Peninsula, Russia, were investigated. The Vilyuchinskie hot springs had a discharge temperature of 55-56°C and Na-Ca-HCO3-type waters rich in silicic and boric acids. Water and biomats had high concentrations of Fe, Mn, Sr, and As. Enumeration of total bacterial abundance (TBA) demonstrated a low density of bacterial populations. However, the fractions of metabolically active bacteria and respiring iron-oxidizing bacteria in the hot-spring water were high, comprising 68 and 21% of TBA, respectively. Scanning electron microscopy equipped with an energy dispersive X-ray spectrometer (SEM-EDX) showed that unicellular rod-shaped bacteria about 5-µm long predominated in the brown biomats. The mineral capsules of these bacteria contained large amounts of Fe and Si. Extracellular and intracellular particles were observed by transmission electron microscopy. Fe-oxidizing bacteria were isolated from the biomats on agar plates with selective medium. Therefore, it can be concluded that microorganisms inhabiting the biomats of the Vilyuchinskie hot springs are essential for the deposition of Fe-minerals at neutral pH. |
format |
Article in Journal/Newspaper |
author |
Belkova,Natalia L. Zakharova,Julia R. Tazaki,Kazue Okrugin,Viktor M. Parfenova,Valentina V. |
author_facet |
Belkova,Natalia L. Zakharova,Julia R. Tazaki,Kazue Okrugin,Viktor M. Parfenova,Valentina V. |
author_sort |
Belkova,Natalia L. |
title |
Fe-Si biominerals in the Vilyuchinskie hot springs, Kamchatka Peninsula, Russia |
title_short |
Fe-Si biominerals in the Vilyuchinskie hot springs, Kamchatka Peninsula, Russia |
title_full |
Fe-Si biominerals in the Vilyuchinskie hot springs, Kamchatka Peninsula, Russia |
title_fullStr |
Fe-Si biominerals in the Vilyuchinskie hot springs, Kamchatka Peninsula, Russia |
title_full_unstemmed |
Fe-Si biominerals in the Vilyuchinskie hot springs, Kamchatka Peninsula, Russia |
title_sort |
fe-si biominerals in the vilyuchinskie hot springs, kamchatka peninsula, russia |
publisher |
Sociedad Española de Microbiología |
publishDate |
2004 |
url |
https://scielo.isciii.es/scielo.php?script=sci_arttext&pid=S1139-67092004000300005 |
long_lat |
ENVELOPE(160.000,160.000,56.000,56.000) |
geographic |
Kamchatka Peninsula |
geographic_facet |
Kamchatka Peninsula |
genre |
Kamchatka Kamchatka Peninsula |
genre_facet |
Kamchatka Kamchatka Peninsula |
op_source |
International Microbiology v.7 n.3 2004 |
_version_ |
1771546936717869056 |