Drivers of soil nitrogen availability and carbon exchange processes in a High Arctic wetland
Increased soil nutrient availability, and associated increases in vegetation productivity, could create a negative feedback between Arctic ecosystems and the climate system, thereby reducing the contribution of Arctic ecosystems to future climate change. To predict whether this feedback will develop...
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Canadian Science Publishing
2024
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Online Access: | https://doi.org/10.1139/as-2022-0048 https://doaj.org/article/efe2c046c1b443f7b901913307d7d15d |
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ftdoajarticles:oai:doaj.org/article:efe2c046c1b443f7b901913307d7d15d 2024-09-15T17:50:25+00:00 Drivers of soil nitrogen availability and carbon exchange processes in a High Arctic wetland Jacqueline K.Y. Hung Neal A. Scott Paul M. Treitz 2024-03-01T00:00:00Z https://doi.org/10.1139/as-2022-0048 https://doaj.org/article/efe2c046c1b443f7b901913307d7d15d EN FR eng fre Canadian Science Publishing https://cdnsciencepub.com/doi/10.1139/as-2022-0048 https://doaj.org/toc/2368-7460 doi:10.1139/as-2022-0048 2368-7460 https://doaj.org/article/efe2c046c1b443f7b901913307d7d15d Arctic Science, Vol 10, Iss 1, Pp 22-33 (2024) nitrogen availability gross ecosystem productivity ecosystem respiration net ecosystem exchange High Arctic wetland climate change Environmental sciences GE1-350 Environmental engineering TA170-171 article 2024 ftdoajarticles https://doi.org/10.1139/as-2022-0048 2024-08-05T17:49:49Z Increased soil nutrient availability, and associated increases in vegetation productivity, could create a negative feedback between Arctic ecosystems and the climate system, thereby reducing the contribution of Arctic ecosystems to future climate change. To predict whether this feedback will develop, it is important to understand the environmental controls over nutrient cycling in High Arctic ecosystems and their impact on carbon cycling processes. Here, we examined the environmental controls over soil nitrogen availability in a High Arctic wet sedge meadow and how abiotic factors and soil nitrogen influenced carbon dioxide exchange processes. The importance of environmental variables was consistent over the 3 years, but the magnitudes of their effect varied depending on climate conditions. Ammonium availability was higher in warmer years and wetter conditions, while drier areas within the wetland had higher nitrate availability. Carbon uptake was driven by soil moisture, active layer depth, and variability between sampling sites and years (R2 = 0.753), while ecosystem respiration was influenced by nitrogen availability, soil temperature, active layer depth, and sampling year (R2 = 0.848). Considered together, the future carbon dioxide source or sink potential of high latitude wetlands will largely depend on climate-induced changes in moisture and subsequent impacts on nutrient availability. Article in Journal/Newspaper Arctic Climate change Directory of Open Access Journals: DOAJ Articles Arctic Science |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English French |
topic |
nitrogen availability gross ecosystem productivity ecosystem respiration net ecosystem exchange High Arctic wetland climate change Environmental sciences GE1-350 Environmental engineering TA170-171 |
spellingShingle |
nitrogen availability gross ecosystem productivity ecosystem respiration net ecosystem exchange High Arctic wetland climate change Environmental sciences GE1-350 Environmental engineering TA170-171 Jacqueline K.Y. Hung Neal A. Scott Paul M. Treitz Drivers of soil nitrogen availability and carbon exchange processes in a High Arctic wetland |
topic_facet |
nitrogen availability gross ecosystem productivity ecosystem respiration net ecosystem exchange High Arctic wetland climate change Environmental sciences GE1-350 Environmental engineering TA170-171 |
description |
Increased soil nutrient availability, and associated increases in vegetation productivity, could create a negative feedback between Arctic ecosystems and the climate system, thereby reducing the contribution of Arctic ecosystems to future climate change. To predict whether this feedback will develop, it is important to understand the environmental controls over nutrient cycling in High Arctic ecosystems and their impact on carbon cycling processes. Here, we examined the environmental controls over soil nitrogen availability in a High Arctic wet sedge meadow and how abiotic factors and soil nitrogen influenced carbon dioxide exchange processes. The importance of environmental variables was consistent over the 3 years, but the magnitudes of their effect varied depending on climate conditions. Ammonium availability was higher in warmer years and wetter conditions, while drier areas within the wetland had higher nitrate availability. Carbon uptake was driven by soil moisture, active layer depth, and variability between sampling sites and years (R2 = 0.753), while ecosystem respiration was influenced by nitrogen availability, soil temperature, active layer depth, and sampling year (R2 = 0.848). Considered together, the future carbon dioxide source or sink potential of high latitude wetlands will largely depend on climate-induced changes in moisture and subsequent impacts on nutrient availability. |
format |
Article in Journal/Newspaper |
author |
Jacqueline K.Y. Hung Neal A. Scott Paul M. Treitz |
author_facet |
Jacqueline K.Y. Hung Neal A. Scott Paul M. Treitz |
author_sort |
Jacqueline K.Y. Hung |
title |
Drivers of soil nitrogen availability and carbon exchange processes in a High Arctic wetland |
title_short |
Drivers of soil nitrogen availability and carbon exchange processes in a High Arctic wetland |
title_full |
Drivers of soil nitrogen availability and carbon exchange processes in a High Arctic wetland |
title_fullStr |
Drivers of soil nitrogen availability and carbon exchange processes in a High Arctic wetland |
title_full_unstemmed |
Drivers of soil nitrogen availability and carbon exchange processes in a High Arctic wetland |
title_sort |
drivers of soil nitrogen availability and carbon exchange processes in a high arctic wetland |
publisher |
Canadian Science Publishing |
publishDate |
2024 |
url |
https://doi.org/10.1139/as-2022-0048 https://doaj.org/article/efe2c046c1b443f7b901913307d7d15d |
genre |
Arctic Climate change |
genre_facet |
Arctic Climate change |
op_source |
Arctic Science, Vol 10, Iss 1, Pp 22-33 (2024) |
op_relation |
https://cdnsciencepub.com/doi/10.1139/as-2022-0048 https://doaj.org/toc/2368-7460 doi:10.1139/as-2022-0048 2368-7460 https://doaj.org/article/efe2c046c1b443f7b901913307d7d15d |
op_doi |
https://doi.org/10.1139/as-2022-0048 |
container_title |
Arctic Science |
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1810292233385017344 |