Root‐associated fungi and acquisitive root traits facilitate permafrost nitrogen uptake from long‐term experimentally warmed tundra
Summary Root‐associated fungi (RAF) and root traits regulate plant acquisition of nitrogen (N), which is limiting to growth in Arctic ecosystems. With anthropogenic warming, a new N source from thawing permafrost has the potential to change vegetation composition and increase productivity, influenci...
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crwiley:10.1111/nph.19521 2024-09-15T18:29:22+00:00 Root‐associated fungi and acquisitive root traits facilitate permafrost nitrogen uptake from long‐term experimentally warmed tundra Hewitt, Rebecca E. DeVan, M. Rae Taylor, D. Lee Mack, Michelle C. Directorate for Biological Sciences 2024 http://dx.doi.org/10.1111/nph.19521 https://nph.onlinelibrary.wiley.com/doi/am-pdf/10.1111/nph.19521 https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.19521 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor New Phytologist volume 242, issue 4, page 1704-1716 ISSN 0028-646X 1469-8137 journal-article 2024 crwiley https://doi.org/10.1111/nph.19521 2024-09-03T04:23:00Z Summary Root‐associated fungi (RAF) and root traits regulate plant acquisition of nitrogen (N), which is limiting to growth in Arctic ecosystems. With anthropogenic warming, a new N source from thawing permafrost has the potential to change vegetation composition and increase productivity, influencing climate feedbacks. Yet, the impact of warming on tundra plant root traits, RAF, and access to permafrost N is uncertain. We investigated the relationships between RAF, species‐specific root traits, and uptake of N from the permafrost boundary by tundra plants experimentally warmed for nearly three decades at Toolik Lake, Alaska. Warming increased acquisitive root traits of nonmycorrhizal and mycorrhizal plants. RAF community composition of ericoid (ERM) but not ectomycorrhizal (ECM) shrubs was impacted by warming and correlated with root traits. RAF taxa in the dark septate endophyte, ERM, and ECM guilds strongly correlated with permafrost N uptake for ECM and ERM shrubs. Overall, a greater proportion of variation in permafrost N uptake was related to root traits than RAF. Our findings suggest that warming Arctic ecosystems will result in interactions between roots, RAF, and newly thawed permafrost that may strongly impact feedbacks to the climate system through mechanisms of carbon and N cycling. Article in Journal/Newspaper permafrost Tundra Alaska Wiley Online Library New Phytologist 242 4 1704 1716 |
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Wiley Online Library |
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English |
description |
Summary Root‐associated fungi (RAF) and root traits regulate plant acquisition of nitrogen (N), which is limiting to growth in Arctic ecosystems. With anthropogenic warming, a new N source from thawing permafrost has the potential to change vegetation composition and increase productivity, influencing climate feedbacks. Yet, the impact of warming on tundra plant root traits, RAF, and access to permafrost N is uncertain. We investigated the relationships between RAF, species‐specific root traits, and uptake of N from the permafrost boundary by tundra plants experimentally warmed for nearly three decades at Toolik Lake, Alaska. Warming increased acquisitive root traits of nonmycorrhizal and mycorrhizal plants. RAF community composition of ericoid (ERM) but not ectomycorrhizal (ECM) shrubs was impacted by warming and correlated with root traits. RAF taxa in the dark septate endophyte, ERM, and ECM guilds strongly correlated with permafrost N uptake for ECM and ERM shrubs. Overall, a greater proportion of variation in permafrost N uptake was related to root traits than RAF. Our findings suggest that warming Arctic ecosystems will result in interactions between roots, RAF, and newly thawed permafrost that may strongly impact feedbacks to the climate system through mechanisms of carbon and N cycling. |
author2 |
Directorate for Biological Sciences |
format |
Article in Journal/Newspaper |
author |
Hewitt, Rebecca E. DeVan, M. Rae Taylor, D. Lee Mack, Michelle C. |
spellingShingle |
Hewitt, Rebecca E. DeVan, M. Rae Taylor, D. Lee Mack, Michelle C. Root‐associated fungi and acquisitive root traits facilitate permafrost nitrogen uptake from long‐term experimentally warmed tundra |
author_facet |
Hewitt, Rebecca E. DeVan, M. Rae Taylor, D. Lee Mack, Michelle C. |
author_sort |
Hewitt, Rebecca E. |
title |
Root‐associated fungi and acquisitive root traits facilitate permafrost nitrogen uptake from long‐term experimentally warmed tundra |
title_short |
Root‐associated fungi and acquisitive root traits facilitate permafrost nitrogen uptake from long‐term experimentally warmed tundra |
title_full |
Root‐associated fungi and acquisitive root traits facilitate permafrost nitrogen uptake from long‐term experimentally warmed tundra |
title_fullStr |
Root‐associated fungi and acquisitive root traits facilitate permafrost nitrogen uptake from long‐term experimentally warmed tundra |
title_full_unstemmed |
Root‐associated fungi and acquisitive root traits facilitate permafrost nitrogen uptake from long‐term experimentally warmed tundra |
title_sort |
root‐associated fungi and acquisitive root traits facilitate permafrost nitrogen uptake from long‐term experimentally warmed tundra |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1111/nph.19521 https://nph.onlinelibrary.wiley.com/doi/am-pdf/10.1111/nph.19521 https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.19521 |
genre |
permafrost Tundra Alaska |
genre_facet |
permafrost Tundra Alaska |
op_source |
New Phytologist volume 242, issue 4, page 1704-1716 ISSN 0028-646X 1469-8137 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/nph.19521 |
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New Phytologist |
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242 |
container_issue |
4 |
container_start_page |
1704 |
op_container_end_page |
1716 |
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1810470772721844224 |