New record of moss and thermophilic bacteria species and physico-chemical properties of geothermal soils on the northwest slope of Mt. Melbourne (Antarctica)
Four samples of surface soils, one with shoots of an unidentified moss species, were collected from a geothermal site on the northwest slope of volcanic Mt. Melbourne (northern Victoria Land, continental Antarctica) to determine physico-chemical properties, isolate existing strains of heterotrophic...
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ftunivsiena:oai:usiena-air.unisi.it:11365/21795 2024-04-21T07:52:13+00:00 New record of moss and thermophilic bacteria species and physico-chemical properties of geothermal soils on the northwest slope of Mt. Melbourne (Antarctica) BARGAGLI, R. SKOTNICKI, M. L. MARRI, L. PEPI, M. MACKENZIE, A. AGNORELLI, C. Bargagli, R. Skotnicki, M. L. Marri, L. Pepi, M. Mackenzie, A. Agnorelli, C. 2004 STAMPA http://hdl.handle.net/11365/21795 https://doi.org/10.1007/s00300-004-0612-6 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000221446900006 volume:27 issue:7 firstpage:423 lastpage:431 numberofpages:9 journal:POLAR BIOLOGY http://hdl.handle.net/11365/21795 doi:10.1007/s00300-004-0612-6 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-3242721597 info:eu-repo/semantics/closedAccess info:eu-repo/semantics/article 2004 ftunivsiena https://doi.org/10.1007/s00300-004-0612-6 2024-03-28T00:48:09Z Four samples of surface soils, one with shoots of an unidentified moss species, were collected from a geothermal site on the northwest slope of volcanic Mt. Melbourne (northern Victoria Land, continental Antarctica) to determine physico-chemical properties, isolate existing strains of heterotrophic microorganisms, and identify the moss species through molecular genetic techniques. Surface soil features such as temperature, grain-size, pH, moisture content, and isolated genera of bacteria, generally corresponded to those previously reported for other geothermal sites in Victoria Land. However, when compared with chemical characteristics of warm substrata from these sites, soils from the northwest slope of Mt. Melbourne showed lower contents of total N and water-extractable PO43- and K+, and relatively higher concentrations of Na, Fe, Mn, and of potentially toxic elements such as Cd and Pb. Preliminary results indicate that a new species of thermophilic bacteria growing in Fe-enriched medium was isolated. Although the study area lay only about 1.5 km from "Cryptogam Ridge", a geothermal site in the rim of the Mt. Melbourne summit crater with a well-developed population of the moss Campylopus pyriformis, molecular genetic analyses showed that the moss on the volcano slope is Pohlia nutans, a species closely related to populations some 110 km to the north in the Mt. Rittmann fumaroles. It was concluded that physico-chemical features of geothermal grounds may affect the colonisation history and dispersal of microorganisms and mosses. Article in Journal/Newspaper Antarc* Antarctica Victoria Land Università degli Studi di Siena: USiena air Polar Biology 27 7 423 431 |
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Open Polar |
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Università degli Studi di Siena: USiena air |
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ftunivsiena |
language |
English |
description |
Four samples of surface soils, one with shoots of an unidentified moss species, were collected from a geothermal site on the northwest slope of volcanic Mt. Melbourne (northern Victoria Land, continental Antarctica) to determine physico-chemical properties, isolate existing strains of heterotrophic microorganisms, and identify the moss species through molecular genetic techniques. Surface soil features such as temperature, grain-size, pH, moisture content, and isolated genera of bacteria, generally corresponded to those previously reported for other geothermal sites in Victoria Land. However, when compared with chemical characteristics of warm substrata from these sites, soils from the northwest slope of Mt. Melbourne showed lower contents of total N and water-extractable PO43- and K+, and relatively higher concentrations of Na, Fe, Mn, and of potentially toxic elements such as Cd and Pb. Preliminary results indicate that a new species of thermophilic bacteria growing in Fe-enriched medium was isolated. Although the study area lay only about 1.5 km from "Cryptogam Ridge", a geothermal site in the rim of the Mt. Melbourne summit crater with a well-developed population of the moss Campylopus pyriformis, molecular genetic analyses showed that the moss on the volcano slope is Pohlia nutans, a species closely related to populations some 110 km to the north in the Mt. Rittmann fumaroles. It was concluded that physico-chemical features of geothermal grounds may affect the colonisation history and dispersal of microorganisms and mosses. |
author2 |
Bargagli, R. Skotnicki, M. L. Marri, L. Pepi, M. Mackenzie, A. Agnorelli, C. |
format |
Article in Journal/Newspaper |
author |
BARGAGLI, R. SKOTNICKI, M. L. MARRI, L. PEPI, M. MACKENZIE, A. AGNORELLI, C. |
spellingShingle |
BARGAGLI, R. SKOTNICKI, M. L. MARRI, L. PEPI, M. MACKENZIE, A. AGNORELLI, C. New record of moss and thermophilic bacteria species and physico-chemical properties of geothermal soils on the northwest slope of Mt. Melbourne (Antarctica) |
author_facet |
BARGAGLI, R. SKOTNICKI, M. L. MARRI, L. PEPI, M. MACKENZIE, A. AGNORELLI, C. |
author_sort |
BARGAGLI, R. |
title |
New record of moss and thermophilic bacteria species and physico-chemical properties of geothermal soils on the northwest slope of Mt. Melbourne (Antarctica) |
title_short |
New record of moss and thermophilic bacteria species and physico-chemical properties of geothermal soils on the northwest slope of Mt. Melbourne (Antarctica) |
title_full |
New record of moss and thermophilic bacteria species and physico-chemical properties of geothermal soils on the northwest slope of Mt. Melbourne (Antarctica) |
title_fullStr |
New record of moss and thermophilic bacteria species and physico-chemical properties of geothermal soils on the northwest slope of Mt. Melbourne (Antarctica) |
title_full_unstemmed |
New record of moss and thermophilic bacteria species and physico-chemical properties of geothermal soils on the northwest slope of Mt. Melbourne (Antarctica) |
title_sort |
new record of moss and thermophilic bacteria species and physico-chemical properties of geothermal soils on the northwest slope of mt. melbourne (antarctica) |
publishDate |
2004 |
url |
http://hdl.handle.net/11365/21795 https://doi.org/10.1007/s00300-004-0612-6 |
genre |
Antarc* Antarctica Victoria Land |
genre_facet |
Antarc* Antarctica Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000221446900006 volume:27 issue:7 firstpage:423 lastpage:431 numberofpages:9 journal:POLAR BIOLOGY http://hdl.handle.net/11365/21795 doi:10.1007/s00300-004-0612-6 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-3242721597 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1007/s00300-004-0612-6 |
container_title |
Polar Biology |
container_volume |
27 |
container_issue |
7 |
container_start_page |
423 |
op_container_end_page |
431 |
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1796935453026287616 |