Predicting climate change impacts on maritime Antarctic soils: A space-for-time substitution study
We report a space-for-time substitution study predicting the impacts of climate change on vegetated maritime Antarctic soils. Analyses of soils from under Deschampsia antarctica sampled from three islands along a 2,200 km climatic gradient indicated that those from sub-Antarctica had higher moisture...
Published in: | Soil Biology and Biochemistry |
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Elsevier
2020
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Online Access: | https://repository.rothamsted.ac.uk/item/96zq8/predicting-climate-change-impacts-on-maritime-antarctic-soils-a-space-for-time-substitution-study https://repository.rothamsted.ac.uk/download/a2bb8dfcce0c111a6c2e8d60c50515575ed53ea1624a36a2ffe8e44e3419709d/5707783/Horrocks-2020-Predicting-climate-change-impacts-o.pdf https://doi.org/10.1016/j.soilbio.2019.107682 |
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ftrothamstedres:oai:repository.rothamsted.ac.uk:96zq8 2023-05-15T13:56:55+02:00 Predicting climate change impacts on maritime Antarctic soils: A space-for-time substitution study Horrocks, C. A. Newsham, K. K. Cox, F. Garnett, M. H. Robinson, C. H. Dungait, J. A. J. 2020 application/pdf https://repository.rothamsted.ac.uk/item/96zq8/predicting-climate-change-impacts-on-maritime-antarctic-soils-a-space-for-time-substitution-study https://repository.rothamsted.ac.uk/download/a2bb8dfcce0c111a6c2e8d60c50515575ed53ea1624a36a2ffe8e44e3419709d/5707783/Horrocks-2020-Predicting-climate-change-impacts-o.pdf https://doi.org/10.1016/j.soilbio.2019.107682 unknown Elsevier https://repository.rothamsted.ac.uk/download/a2bb8dfcce0c111a6c2e8d60c50515575ed53ea1624a36a2ffe8e44e3419709d/5707783/Horrocks-2020-Predicting-climate-change-impacts-o.pdf https://doi.org/10.1016/j.soilbio.2019.107682 Horrocks, C. A., Newsham, K. K., Cox, F., Garnett, M. H., Robinson, C. H. and Dungait, J. A. J. 2020. Predicting climate change impacts on maritime Antarctic soils: A space-for-time substitution study. Soil Biology and Biochemistry. 141, p. 107682. https://doi.org/10.1016/j.soilbio.2019.107682 Biomarkers Climate change 13C 14C 15N Sub- and maritime Antarctica journal-article 2020 ftrothamstedres https://doi.org/10.1016/j.soilbio.2019.107682 2022-08-09T17:13:47Z We report a space-for-time substitution study predicting the impacts of climate change on vegetated maritime Antarctic soils. Analyses of soils from under Deschampsia antarctica sampled from three islands along a 2,200 km climatic gradient indicated that those from sub-Antarctica had higher moisture, organic matter and carbon (C) concentrations, more depleted δ13C values, lower concentrations of the fungal biomarker ergosterol and higher concentrations of bacterial PLFA biomarkers and plant wax n-alkane biomarkers than those from maritime Antarctica. Shallow soils (2 cm depth) were wetter, and had higher concentrations of organic matter, ergosterol and bacterial PLFAs, than deeper soils (4 cm and 8 cm depths). Correlative analyses indicated that factors associated with climate change (increased soil moisture, C and organic matter concentrations, and depleted δ13C contents) are likely to give rise to increases in Gram negative bacteria, and decreases in Gram positive bacteria and fungi, in maritime Antarctic soils. Bomb-14C analyses indicated that sub-Antarctic soils at all depths contained significant amounts of modern 14C (C fixed from the atmosphere post c. 1955), whereas modern 14C was restricted to depths of 2 cm and 4 cm in maritime Antarctica. The oldest C (c. 1,745 years BP) was present in the southernmost soil. The higher nitrogen (N) concentrations and δ15N values recorded in the southernmost soil were attributed to N inputs from bird guano. Based on these analyses, we conclude that 5–8 °C rises in air temperature, together with associated increases in precipitation, are likely to have substantial impacts on maritime Antarctic soils, but that, at the rates of climate warming predicted under moderate greenhouse gas emission scenarios, these impacts are likely to take at least a century to manifest themselves. Other/Unknown Material Antarc* Antarctic Antarctica Rothamsted Repository (Rothamsted Research) Antarctic Guano ENVELOPE(141.604,141.604,-66.775,-66.775) Soil Biology and Biochemistry 141 107682 |
institution |
Open Polar |
collection |
Rothamsted Repository (Rothamsted Research) |
op_collection_id |
ftrothamstedres |
language |
unknown |
topic |
Biomarkers Climate change 13C 14C 15N Sub- and maritime Antarctica |
spellingShingle |
Biomarkers Climate change 13C 14C 15N Sub- and maritime Antarctica Horrocks, C. A. Newsham, K. K. Cox, F. Garnett, M. H. Robinson, C. H. Dungait, J. A. J. Predicting climate change impacts on maritime Antarctic soils: A space-for-time substitution study |
topic_facet |
Biomarkers Climate change 13C 14C 15N Sub- and maritime Antarctica |
description |
We report a space-for-time substitution study predicting the impacts of climate change on vegetated maritime Antarctic soils. Analyses of soils from under Deschampsia antarctica sampled from three islands along a 2,200 km climatic gradient indicated that those from sub-Antarctica had higher moisture, organic matter and carbon (C) concentrations, more depleted δ13C values, lower concentrations of the fungal biomarker ergosterol and higher concentrations of bacterial PLFA biomarkers and plant wax n-alkane biomarkers than those from maritime Antarctica. Shallow soils (2 cm depth) were wetter, and had higher concentrations of organic matter, ergosterol and bacterial PLFAs, than deeper soils (4 cm and 8 cm depths). Correlative analyses indicated that factors associated with climate change (increased soil moisture, C and organic matter concentrations, and depleted δ13C contents) are likely to give rise to increases in Gram negative bacteria, and decreases in Gram positive bacteria and fungi, in maritime Antarctic soils. Bomb-14C analyses indicated that sub-Antarctic soils at all depths contained significant amounts of modern 14C (C fixed from the atmosphere post c. 1955), whereas modern 14C was restricted to depths of 2 cm and 4 cm in maritime Antarctica. The oldest C (c. 1,745 years BP) was present in the southernmost soil. The higher nitrogen (N) concentrations and δ15N values recorded in the southernmost soil were attributed to N inputs from bird guano. Based on these analyses, we conclude that 5–8 °C rises in air temperature, together with associated increases in precipitation, are likely to have substantial impacts on maritime Antarctic soils, but that, at the rates of climate warming predicted under moderate greenhouse gas emission scenarios, these impacts are likely to take at least a century to manifest themselves. |
format |
Other/Unknown Material |
author |
Horrocks, C. A. Newsham, K. K. Cox, F. Garnett, M. H. Robinson, C. H. Dungait, J. A. J. |
author_facet |
Horrocks, C. A. Newsham, K. K. Cox, F. Garnett, M. H. Robinson, C. H. Dungait, J. A. J. |
author_sort |
Horrocks, C. A. |
title |
Predicting climate change impacts on maritime Antarctic soils: A space-for-time substitution study |
title_short |
Predicting climate change impacts on maritime Antarctic soils: A space-for-time substitution study |
title_full |
Predicting climate change impacts on maritime Antarctic soils: A space-for-time substitution study |
title_fullStr |
Predicting climate change impacts on maritime Antarctic soils: A space-for-time substitution study |
title_full_unstemmed |
Predicting climate change impacts on maritime Antarctic soils: A space-for-time substitution study |
title_sort |
predicting climate change impacts on maritime antarctic soils: a space-for-time substitution study |
publisher |
Elsevier |
publishDate |
2020 |
url |
https://repository.rothamsted.ac.uk/item/96zq8/predicting-climate-change-impacts-on-maritime-antarctic-soils-a-space-for-time-substitution-study https://repository.rothamsted.ac.uk/download/a2bb8dfcce0c111a6c2e8d60c50515575ed53ea1624a36a2ffe8e44e3419709d/5707783/Horrocks-2020-Predicting-climate-change-impacts-o.pdf https://doi.org/10.1016/j.soilbio.2019.107682 |
long_lat |
ENVELOPE(141.604,141.604,-66.775,-66.775) |
geographic |
Antarctic Guano |
geographic_facet |
Antarctic Guano |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
https://repository.rothamsted.ac.uk/download/a2bb8dfcce0c111a6c2e8d60c50515575ed53ea1624a36a2ffe8e44e3419709d/5707783/Horrocks-2020-Predicting-climate-change-impacts-o.pdf https://doi.org/10.1016/j.soilbio.2019.107682 Horrocks, C. A., Newsham, K. K., Cox, F., Garnett, M. H., Robinson, C. H. and Dungait, J. A. J. 2020. Predicting climate change impacts on maritime Antarctic soils: A space-for-time substitution study. Soil Biology and Biochemistry. 141, p. 107682. https://doi.org/10.1016/j.soilbio.2019.107682 |
op_doi |
https://doi.org/10.1016/j.soilbio.2019.107682 |
container_title |
Soil Biology and Biochemistry |
container_volume |
141 |
container_start_page |
107682 |
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1766264525686833152 |