Root-associated fungi and acquisitive root traits facilitate permafrost nitrogen uptake from long-term experimentally warmed tundra

© 2024 The Authors. New Phytologist © 2024 New Phytologist Foundation.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 242(2024), 4 vom: 20. Apr., Seite 1704-1716
1. Verfasser: Hewitt, Rebecca E (VerfasserIn)
Weitere Verfasser: DeVan, M Rae, Taylor, D Lee, Mack, Michelle C
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Alaska dark septate endophyte ectomycorrhizal fungi ericoid mycorrhizal fungi isotope 15N moist acidic tundra shrub expansion mehr... Nitrogen N762921K75
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520 |a 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 
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650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Research Support, U.S. Gov't, Non-P.H.S. 
650 4 |a Alaska 
650 4 |a dark septate endophyte 
650 4 |a ectomycorrhizal fungi 
650 4 |a ericoid mycorrhizal fungi 
650 4 |a isotope 15N 
650 4 |a moist acidic tundra 
650 4 |a shrub expansion 
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700 1 |a DeVan, M Rae  |e verfasserin  |4 aut 
700 1 |a Taylor, D Lee  |e verfasserin  |4 aut 
700 1 |a Mack, Michelle C  |e verfasserin  |4 aut 
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