Fire intensity regulates the short-term postfire response of the microbiome in Arctic tundra soil
Arctic tundra fires have been increasing in extent, frequency and intensity and are likely impacting both soil nitrogen (N) and phosphorus (P) cycling and, thus, permafrost ecosystem functioning. However, little is known on the underlying microbial mechanisms, and different fire intensities were neg...
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Online Access: | https://publikationen.bibliothek.kit.edu/1000162182 https://publikationen.bibliothek.kit.edu/1000162182/151366331 https://doi.org/10.5445/IR/1000162182 |
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ftubkarlsruhe:oai:EVASTAR-Karlsruhe.de:1000162182 2023-11-12T04:11:51+01:00 Fire intensity regulates the short-term postfire response of the microbiome in Arctic tundra soil Ramm, Elisabeth Ambus, Per Lennart Gschwendtner, Silvia Liu, Chunyan Schloter, Michael Dannenmann, Michael 2023-09-14 application/pdf https://publikationen.bibliothek.kit.edu/1000162182 https://publikationen.bibliothek.kit.edu/1000162182/151366331 https://doi.org/10.5445/IR/1000162182 eng eng Elsevier info:eu-repo/semantics/altIdentifier/wos/001059436300001 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geoderma.2023.116627 info:eu-repo/semantics/altIdentifier/issn/0016-7061 info:eu-repo/semantics/altIdentifier/issn/1872-6259 https://publikationen.bibliothek.kit.edu/1000162182 https://publikationen.bibliothek.kit.edu/1000162182/151366331 https://doi.org/10.5445/IR/1000162182 https://creativecommons.org/licenses/by/4.0/deed.de info:eu-repo/semantics/openAccess Geoderma, 438, Art.Nr.: 116627 ISSN: 0016-7061, 1872-6259 Arctic Fire intensity Nitrogen Phosphorus Soil microbiome qPCR ddc:550 Earth sciences info:eu-repo/classification/ddc/550 doc-type:article Text info:eu-repo/semantics/article article info:eu-repo/semantics/publishedVersion 2023 ftubkarlsruhe https://doi.org/10.5445/IR/100016218210.1016/j.geoderma.2023.116627 2023-10-22T22:09:34Z Arctic tundra fires have been increasing in extent, frequency and intensity and are likely impacting both soil nitrogen (N) and phosphorus (P) cycling and, thus, permafrost ecosystem functioning. However, little is known on the underlying microbial mechanisms, and different fire intensities were neglected so far. To better understand immediate influences of different fire intensities on the soil microbiome involved in nutrient cycling in permafrost-affected soil, we deployed experimental fires with low and high intensity on an Arctic tundra soil on Disko Island, Greenland. Soil sampling took place three days postfire and included an unburned control. Using quantitative real-time PCR, copy numbers of 16S and ITS as well as of 17 genes coding for functional microbial groups catalyzing major steps of N and P turnover were assessed. We show that fires change the abundance of microbial groups already after three days with fire intensity as key mediating factor. Specifically, low-intensity fire significantly enhanced the abundance of chiA mineralizers and ammonia-oxidizing archaea, while other groups were not affected. On the contrary, high-intensity fire decreased the abundance of chiA mineralizers and of microbes that fix dinitrogen, indicating a dampening effect on N cycling. Only high-intensity fires enhanced ammonium concentrations (by an order of magnitude). This can be explained by burned plant material and the absence of plant uptake, together with impaired further N processing. Fire with high intensity also decreased nirK-type denitrifiers. In contrast, after fire with low intensity there was a trend for a decreased nosZ : (nirK+nirS) ratio, indicating – together with increased nitrate concentrations – an enhanced potential for nitric oxide and nitrous oxide emissions. Concerning P transformation, only gcd was affected in the short term which is important for P solubilization. Changes in gene numbers consistently showed the same contrasting pattern of elevated abundance with low fire intensity and decreased ... Article in Journal/Newspaper Arctic Greenland permafrost Tundra KITopen (Karlsruhe Institute of Technologie) Arctic Greenland |
institution |
Open Polar |
collection |
KITopen (Karlsruhe Institute of Technologie) |
op_collection_id |
ftubkarlsruhe |
language |
English |
topic |
Arctic Fire intensity Nitrogen Phosphorus Soil microbiome qPCR ddc:550 Earth sciences info:eu-repo/classification/ddc/550 |
spellingShingle |
Arctic Fire intensity Nitrogen Phosphorus Soil microbiome qPCR ddc:550 Earth sciences info:eu-repo/classification/ddc/550 Ramm, Elisabeth Ambus, Per Lennart Gschwendtner, Silvia Liu, Chunyan Schloter, Michael Dannenmann, Michael Fire intensity regulates the short-term postfire response of the microbiome in Arctic tundra soil |
topic_facet |
Arctic Fire intensity Nitrogen Phosphorus Soil microbiome qPCR ddc:550 Earth sciences info:eu-repo/classification/ddc/550 |
description |
Arctic tundra fires have been increasing in extent, frequency and intensity and are likely impacting both soil nitrogen (N) and phosphorus (P) cycling and, thus, permafrost ecosystem functioning. However, little is known on the underlying microbial mechanisms, and different fire intensities were neglected so far. To better understand immediate influences of different fire intensities on the soil microbiome involved in nutrient cycling in permafrost-affected soil, we deployed experimental fires with low and high intensity on an Arctic tundra soil on Disko Island, Greenland. Soil sampling took place three days postfire and included an unburned control. Using quantitative real-time PCR, copy numbers of 16S and ITS as well as of 17 genes coding for functional microbial groups catalyzing major steps of N and P turnover were assessed. We show that fires change the abundance of microbial groups already after three days with fire intensity as key mediating factor. Specifically, low-intensity fire significantly enhanced the abundance of chiA mineralizers and ammonia-oxidizing archaea, while other groups were not affected. On the contrary, high-intensity fire decreased the abundance of chiA mineralizers and of microbes that fix dinitrogen, indicating a dampening effect on N cycling. Only high-intensity fires enhanced ammonium concentrations (by an order of magnitude). This can be explained by burned plant material and the absence of plant uptake, together with impaired further N processing. Fire with high intensity also decreased nirK-type denitrifiers. In contrast, after fire with low intensity there was a trend for a decreased nosZ : (nirK+nirS) ratio, indicating – together with increased nitrate concentrations – an enhanced potential for nitric oxide and nitrous oxide emissions. Concerning P transformation, only gcd was affected in the short term which is important for P solubilization. Changes in gene numbers consistently showed the same contrasting pattern of elevated abundance with low fire intensity and decreased ... |
format |
Article in Journal/Newspaper |
author |
Ramm, Elisabeth Ambus, Per Lennart Gschwendtner, Silvia Liu, Chunyan Schloter, Michael Dannenmann, Michael |
author_facet |
Ramm, Elisabeth Ambus, Per Lennart Gschwendtner, Silvia Liu, Chunyan Schloter, Michael Dannenmann, Michael |
author_sort |
Ramm, Elisabeth |
title |
Fire intensity regulates the short-term postfire response of the microbiome in Arctic tundra soil |
title_short |
Fire intensity regulates the short-term postfire response of the microbiome in Arctic tundra soil |
title_full |
Fire intensity regulates the short-term postfire response of the microbiome in Arctic tundra soil |
title_fullStr |
Fire intensity regulates the short-term postfire response of the microbiome in Arctic tundra soil |
title_full_unstemmed |
Fire intensity regulates the short-term postfire response of the microbiome in Arctic tundra soil |
title_sort |
fire intensity regulates the short-term postfire response of the microbiome in arctic tundra soil |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://publikationen.bibliothek.kit.edu/1000162182 https://publikationen.bibliothek.kit.edu/1000162182/151366331 https://doi.org/10.5445/IR/1000162182 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland permafrost Tundra |
genre_facet |
Arctic Greenland permafrost Tundra |
op_source |
Geoderma, 438, Art.Nr.: 116627 ISSN: 0016-7061, 1872-6259 |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/001059436300001 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geoderma.2023.116627 info:eu-repo/semantics/altIdentifier/issn/0016-7061 info:eu-repo/semantics/altIdentifier/issn/1872-6259 https://publikationen.bibliothek.kit.edu/1000162182 https://publikationen.bibliothek.kit.edu/1000162182/151366331 https://doi.org/10.5445/IR/1000162182 |
op_rights |
https://creativecommons.org/licenses/by/4.0/deed.de info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5445/IR/100016218210.1016/j.geoderma.2023.116627 |
_version_ |
1782330732921749504 |