دورية أكاديمية
Trees out‐forage understorey shrubs for nitrogen patches in a subarctic mountain birch forest
| العنوان: | Trees out‐forage understorey shrubs for nitrogen patches in a subarctic mountain birch forest |
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| المؤلفون: | Friggens, NL, Hartley, IP, Parker, TC, Subke, J, Wookey, PA |
| بيانات النشر: | Wiley / Nordic Society Oikos |
| سنة النشر: | 2022 |
| المجموعة: | University of Exeter: Open Research Exeter (ORE) |
| مصطلحات موضوعية: | Betula pubescens, 15N labelling, nitrogen partitioning, shrubs, treeline forest |
| الوصف: | This is the final version. Available on open access from Wiley via the DOI in this record. ; Data availability statement: Data are available from the Dryad Digital Repository: https:// doi.org/10.5061/dryad.j0zpc86j6 (Friggens et al. 2022). ; Nitrogen (N), acquired by roots and mycorrhizal fungi and supplied to plant foliage, is a growth-limiting nutrient at the subarctic treeline. Due to this limitation, interspecific competition and acquisition of N is an important control on plant community composition and distribution. The ability of trees and shrubs to access N shapes community dynamics at this ecotone undergoing species range shifts and changes in primary productivity driven by climate change. Using 15N soil labelling we investigate the fate of soil inorganic N, and spatial distances over which trees and understorey shrubs access soil N, in a treeline forest. 15N was injected into soil rooting zones in discrete 1 m2 patches and foliar samples were collected from trees between 1 and 50 m away, and understorey shrubs between 0.5 and 11 m away from labelled soil. The 15N label was found in mountain birch trees up to 5 m, and in understorey shrubs up to 2 m, away from labelled soil. We estimate that 1.27% of pulse-derived N was found in foliage of birch trees, compared to 1.16% in the understorey. However, mountain birch trees contributed only 31% of ecosystem leaf area index (LAI), thus there was a disproportionate allocation of added label to the birch canopy compared with its contribution to ecosystem LAI. The difference in root and mycorrhizal exploration distances and community N partitioning between mountain birch trees and understorey shrubs may confer competitive advantage to trees with respect to nitrogen and nutrient patches, which may alter plant community structures within these forests. This is particularly important considering predicted climate-driven tree and tall shrub expansion in subarctic regions, with likely consequences for ecosystem N and carbon (C) cycling, as well as for community ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 0030-1299 1600-0706 |
| العلاقة: | https://doi.org/10.5061/dryad.j0zpc86j6Test; orcid:0000-0002-9183-6617 (Hartley, Iain P); Published online 22 December 2022; https://doi.org/10.1111/oik.09567Test; 730938; NE/P002722/1; NE/P002722/2; LSMSF CEH_L_113_05_2018; http://hdl.handle.net/10871/132145Test; Oikos |
| DOI: | 10.1111/oik.09567 |
| الإتاحة: | https://doi.org/10.1111/oik.09567Test https://doi.org/10.5061/dryad.j0zpc86j6Test http://hdl.handle.net/10871/132145Test |
| حقوق: | © 2022 The Authors. Oikos published by John Wiley & Sons Ltd on behalf of Nordic Society Oikos. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. ; https://creativecommons.org/licenses/by/4.0Test/ |
| رقم الانضمام: | edsbas.A72ECE0 |
| قاعدة البيانات: | BASE |
| تدمد: | 00301299 16000706 |
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| DOI: | 10.1111/oik.09567 |