Abiotic factors influencing soil microbial activity in the northern Antarctic Peninsula region
Microorganisms play a key role in the carbon (C) cycle through soil organic matter (SOM). The rate of SOM mineralization, the influence of abiotic factors on this rate and the potential behaviour of SOM are of particular interest in the northern Antarctic Peninsula and offshore islands. This is one...
Published in: | Science of The Total Environment |
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Online Access: | https://hdl.handle.net/10289/13775 https://doi.org/10.1016/j.scitotenv.2020.141602 |
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ftunivwaikato:oai:researchcommons.waikato.ac.nz:10289/13775 2023-12-24T10:11:08+01:00 Abiotic factors influencing soil microbial activity in the northern Antarctic Peninsula region Díaz-Puente, F.J. Schmid, T. Pelayo, M. Rodríguez-Rastrero, M. Herraiz, M.J.S. O'Neill, Tanya Ann López-Martínez, J. 2020 application/pdf https://hdl.handle.net/10289/13775 https://doi.org/10.1016/j.scitotenv.2020.141602 en eng Elsevier BV Science of The Total Environment Díaz-Puente, F. J., Schmid, T., Pelayo, M., Rodríguez-Rastrero, M., Herraiz, M. J. S., O’Neill, T. A., & López-Martínez, J. (2020). Abiotic factors influencing soil microbial activity in the northern Antarctic Peninsula region. Science of The Total Environment. https://doi.org/10.1016/j.scitotenv.2020.141602 0048-9697 https://hdl.handle.net/10289/13775 doi:10.1016/j.scitotenv.2020.141602 © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ microbial activity soils organic matter mineralization South Shetland Islands Journal Article 2020 ftunivwaikato https://doi.org/10.1016/j.scitotenv.2020.141602 2023-11-28T18:25:49Z Microorganisms play a key role in the carbon (C) cycle through soil organic matter (SOM). The rate of SOM mineralization, the influence of abiotic factors on this rate and the potential behaviour of SOM are of particular interest in the northern Antarctic Peninsula and offshore islands. This is one of the most rapidly warming regions on Earth with numerous ice-free areas, some with abundant wildlife and with the greatest known soil organic carbon (SOC) storage in Antarctica. The latter implies extended Antarctic summer conditions promote increased terrestrial plant growth and soil microbial activity (SMA). SMA, determined by respirometry, is a measure of ecosystem function, and depends on microclimatic conditions and soil environmental properties. SMA and the effect of abiotic variables have been analysed in locations with different soil types, on Cierva Point (Antarctic Peninsula), Deception Island and Fildes Peninsula (King George Island). Soil microbial biomass carbon (SMBC) ranged from 5.66 to 196.6 mg SMBC kg−1and basal respiration (BR) from 2.86 to 160.67 mg CO₂ kg⁻¹ d⁻¹. SMBC and BR values were higher in Cierva Point, followed by Fildes Peninsula and Deception Island, showing the same trend of SOM abundance. Except for Cierva Point, low nitrogen, phosphorus and C concentrations were observed. SMBC/total organic carbon (TOC) levels indicated that SOC was recalcitrant and SOM content was closely related to the extent of vegetation cover observed in situ. High metabolic quotient values obtained at Cierva Point and Deception Island (median values 7.27 and 6.53 mg C-CO₂ g SMBC⁻¹ h⁻¹) and low SMBC/TOC in Cierva Point suggest a poor efficiency of the microbial populations in the consumption of the SOC. High SMBC/TOC values obtained in Deception Island indicates that SMBC may influence SOM stabilization. Mineralization rates were very low (negligible values to 1.44%) and sites with the lowest values had the highest SOM. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Deception Island King George Island South Shetland Islands The University of Waikato: Research Commons Antarctic Antarctic Peninsula Cierva ENVELOPE(-60.873,-60.873,-64.156,-64.156) Cierva Point ENVELOPE(-60.967,-60.967,-64.150,-64.150) Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) Fildes ENVELOPE(-58.817,-58.817,-62.217,-62.217) Fildes peninsula ENVELOPE(-58.948,-58.948,-62.182,-62.182) King George Island South Shetland Islands Science of The Total Environment 750 141602 |
institution |
Open Polar |
collection |
The University of Waikato: Research Commons |
op_collection_id |
ftunivwaikato |
language |
English |
topic |
microbial activity soils organic matter mineralization South Shetland Islands |
spellingShingle |
microbial activity soils organic matter mineralization South Shetland Islands Díaz-Puente, F.J. Schmid, T. Pelayo, M. Rodríguez-Rastrero, M. Herraiz, M.J.S. O'Neill, Tanya Ann López-Martínez, J. Abiotic factors influencing soil microbial activity in the northern Antarctic Peninsula region |
topic_facet |
microbial activity soils organic matter mineralization South Shetland Islands |
description |
Microorganisms play a key role in the carbon (C) cycle through soil organic matter (SOM). The rate of SOM mineralization, the influence of abiotic factors on this rate and the potential behaviour of SOM are of particular interest in the northern Antarctic Peninsula and offshore islands. This is one of the most rapidly warming regions on Earth with numerous ice-free areas, some with abundant wildlife and with the greatest known soil organic carbon (SOC) storage in Antarctica. The latter implies extended Antarctic summer conditions promote increased terrestrial plant growth and soil microbial activity (SMA). SMA, determined by respirometry, is a measure of ecosystem function, and depends on microclimatic conditions and soil environmental properties. SMA and the effect of abiotic variables have been analysed in locations with different soil types, on Cierva Point (Antarctic Peninsula), Deception Island and Fildes Peninsula (King George Island). Soil microbial biomass carbon (SMBC) ranged from 5.66 to 196.6 mg SMBC kg−1and basal respiration (BR) from 2.86 to 160.67 mg CO₂ kg⁻¹ d⁻¹. SMBC and BR values were higher in Cierva Point, followed by Fildes Peninsula and Deception Island, showing the same trend of SOM abundance. Except for Cierva Point, low nitrogen, phosphorus and C concentrations were observed. SMBC/total organic carbon (TOC) levels indicated that SOC was recalcitrant and SOM content was closely related to the extent of vegetation cover observed in situ. High metabolic quotient values obtained at Cierva Point and Deception Island (median values 7.27 and 6.53 mg C-CO₂ g SMBC⁻¹ h⁻¹) and low SMBC/TOC in Cierva Point suggest a poor efficiency of the microbial populations in the consumption of the SOC. High SMBC/TOC values obtained in Deception Island indicates that SMBC may influence SOM stabilization. Mineralization rates were very low (negligible values to 1.44%) and sites with the lowest values had the highest SOM. |
format |
Article in Journal/Newspaper |
author |
Díaz-Puente, F.J. Schmid, T. Pelayo, M. Rodríguez-Rastrero, M. Herraiz, M.J.S. O'Neill, Tanya Ann López-Martínez, J. |
author_facet |
Díaz-Puente, F.J. Schmid, T. Pelayo, M. Rodríguez-Rastrero, M. Herraiz, M.J.S. O'Neill, Tanya Ann López-Martínez, J. |
author_sort |
Díaz-Puente, F.J. |
title |
Abiotic factors influencing soil microbial activity in the northern Antarctic Peninsula region |
title_short |
Abiotic factors influencing soil microbial activity in the northern Antarctic Peninsula region |
title_full |
Abiotic factors influencing soil microbial activity in the northern Antarctic Peninsula region |
title_fullStr |
Abiotic factors influencing soil microbial activity in the northern Antarctic Peninsula region |
title_full_unstemmed |
Abiotic factors influencing soil microbial activity in the northern Antarctic Peninsula region |
title_sort |
abiotic factors influencing soil microbial activity in the northern antarctic peninsula region |
publisher |
Elsevier BV |
publishDate |
2020 |
url |
https://hdl.handle.net/10289/13775 https://doi.org/10.1016/j.scitotenv.2020.141602 |
long_lat |
ENVELOPE(-60.873,-60.873,-64.156,-64.156) ENVELOPE(-60.967,-60.967,-64.150,-64.150) ENVELOPE(-60.633,-60.633,-62.950,-62.950) ENVELOPE(-58.817,-58.817,-62.217,-62.217) ENVELOPE(-58.948,-58.948,-62.182,-62.182) |
geographic |
Antarctic Antarctic Peninsula Cierva Cierva Point Deception Island Fildes Fildes peninsula King George Island South Shetland Islands |
geographic_facet |
Antarctic Antarctic Peninsula Cierva Cierva Point Deception Island Fildes Fildes peninsula King George Island South Shetland Islands |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Deception Island King George Island South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Deception Island King George Island South Shetland Islands |
op_relation |
Science of The Total Environment Díaz-Puente, F. J., Schmid, T., Pelayo, M., Rodríguez-Rastrero, M., Herraiz, M. J. S., O’Neill, T. A., & López-Martínez, J. (2020). Abiotic factors influencing soil microbial activity in the northern Antarctic Peninsula region. Science of The Total Environment. https://doi.org/10.1016/j.scitotenv.2020.141602 0048-9697 https://hdl.handle.net/10289/13775 doi:10.1016/j.scitotenv.2020.141602 |
op_rights |
© 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1016/j.scitotenv.2020.141602 |
container_title |
Science of The Total Environment |
container_volume |
750 |
container_start_page |
141602 |
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1786160988395929600 |