Microbiogeochemical Traits to Identify Nitrogen Hotspots in Permafrost Regions
Permafrost-affected tundra soils are large carbon (C) and nitrogen (N) reservoirs. However, N is largely bound in soil organic matter (SOM), and ecosystems generally have low N availability. Therefore, microbial induced N-cycling processes and N losses were considered negligible. Recent studies show...
Published in: | Nitrogen |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
MDPI AG
2022
|
Subjects: | |
Online Access: | https://doi.org/10.3390/nitrogen3030031 https://doaj.org/article/9350d2901d5f4a80acbff2969a7289fc |
id |
ftdoajarticles:oai:doaj.org/article:9350d2901d5f4a80acbff2969a7289fc |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:9350d2901d5f4a80acbff2969a7289fc 2023-05-15T17:55:27+02:00 Microbiogeochemical Traits to Identify Nitrogen Hotspots in Permafrost Regions Claudia Fiencke Maija E. Marushchak Tina Sanders Rica Wegner Christian Beer 2022-08-01T00:00:00Z https://doi.org/10.3390/nitrogen3030031 https://doaj.org/article/9350d2901d5f4a80acbff2969a7289fc EN eng MDPI AG https://www.mdpi.com/2504-3129/3/3/31 https://doaj.org/toc/2504-3129 doi:10.3390/nitrogen3030031 2504-3129 https://doaj.org/article/9350d2901d5f4a80acbff2969a7289fc Nitrogen, Vol 3, Iss 31, Pp 458-501 (2022) inorganic nitrogen nitrogen availability nitrification denitrification nitrous oxide (N 2 O) nitrate Ecology QH540-549.5 article 2022 ftdoajarticles https://doi.org/10.3390/nitrogen3030031 2022-12-30T22:02:19Z Permafrost-affected tundra soils are large carbon (C) and nitrogen (N) reservoirs. However, N is largely bound in soil organic matter (SOM), and ecosystems generally have low N availability. Therefore, microbial induced N-cycling processes and N losses were considered negligible. Recent studies show that microbial N processing rates, inorganic N availability, and lateral N losses from thawing permafrost increase when vegetation cover is disturbed, resulting in reduced N uptake or increased N input from thawing permafrost. In this review, we describe currently known N hotspots, particularly bare patches in permafrost peatland or permafrost soils affected by thermokarst, and their microbiogeochemical characteristics, and present evidence for previously unrecorded N hotspots in the tundra. We summarize the current understanding of microbial N cycling processes that promote the release of the potent greenhouse gas (GHG) nitrous oxide (N 2 O) and the translocation of inorganic N from terrestrial into aquatic ecosystems. We suggest that certain soil characteristics and microbial traits can be used as indicators of N availability and N losses. Identifying N hotspots in permafrost soils is key to assessing the potential for N release from permafrost-affected soils under global warming, as well as the impact of increased N availability on emissions of carbon-containing GHGs. Article in Journal/Newspaper permafrost Thermokarst Tundra Directory of Open Access Journals: DOAJ Articles Nitrogen 3 3 458 501 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
inorganic nitrogen nitrogen availability nitrification denitrification nitrous oxide (N 2 O) nitrate Ecology QH540-549.5 |
spellingShingle |
inorganic nitrogen nitrogen availability nitrification denitrification nitrous oxide (N 2 O) nitrate Ecology QH540-549.5 Claudia Fiencke Maija E. Marushchak Tina Sanders Rica Wegner Christian Beer Microbiogeochemical Traits to Identify Nitrogen Hotspots in Permafrost Regions |
topic_facet |
inorganic nitrogen nitrogen availability nitrification denitrification nitrous oxide (N 2 O) nitrate Ecology QH540-549.5 |
description |
Permafrost-affected tundra soils are large carbon (C) and nitrogen (N) reservoirs. However, N is largely bound in soil organic matter (SOM), and ecosystems generally have low N availability. Therefore, microbial induced N-cycling processes and N losses were considered negligible. Recent studies show that microbial N processing rates, inorganic N availability, and lateral N losses from thawing permafrost increase when vegetation cover is disturbed, resulting in reduced N uptake or increased N input from thawing permafrost. In this review, we describe currently known N hotspots, particularly bare patches in permafrost peatland or permafrost soils affected by thermokarst, and their microbiogeochemical characteristics, and present evidence for previously unrecorded N hotspots in the tundra. We summarize the current understanding of microbial N cycling processes that promote the release of the potent greenhouse gas (GHG) nitrous oxide (N 2 O) and the translocation of inorganic N from terrestrial into aquatic ecosystems. We suggest that certain soil characteristics and microbial traits can be used as indicators of N availability and N losses. Identifying N hotspots in permafrost soils is key to assessing the potential for N release from permafrost-affected soils under global warming, as well as the impact of increased N availability on emissions of carbon-containing GHGs. |
format |
Article in Journal/Newspaper |
author |
Claudia Fiencke Maija E. Marushchak Tina Sanders Rica Wegner Christian Beer |
author_facet |
Claudia Fiencke Maija E. Marushchak Tina Sanders Rica Wegner Christian Beer |
author_sort |
Claudia Fiencke |
title |
Microbiogeochemical Traits to Identify Nitrogen Hotspots in Permafrost Regions |
title_short |
Microbiogeochemical Traits to Identify Nitrogen Hotspots in Permafrost Regions |
title_full |
Microbiogeochemical Traits to Identify Nitrogen Hotspots in Permafrost Regions |
title_fullStr |
Microbiogeochemical Traits to Identify Nitrogen Hotspots in Permafrost Regions |
title_full_unstemmed |
Microbiogeochemical Traits to Identify Nitrogen Hotspots in Permafrost Regions |
title_sort |
microbiogeochemical traits to identify nitrogen hotspots in permafrost regions |
publisher |
MDPI AG |
publishDate |
2022 |
url |
https://doi.org/10.3390/nitrogen3030031 https://doaj.org/article/9350d2901d5f4a80acbff2969a7289fc |
genre |
permafrost Thermokarst Tundra |
genre_facet |
permafrost Thermokarst Tundra |
op_source |
Nitrogen, Vol 3, Iss 31, Pp 458-501 (2022) |
op_relation |
https://www.mdpi.com/2504-3129/3/3/31 https://doaj.org/toc/2504-3129 doi:10.3390/nitrogen3030031 2504-3129 https://doaj.org/article/9350d2901d5f4a80acbff2969a7289fc |
op_doi |
https://doi.org/10.3390/nitrogen3030031 |
container_title |
Nitrogen |
container_volume |
3 |
container_issue |
3 |
container_start_page |
458 |
op_container_end_page |
501 |
_version_ |
1766163398835306496 |