Ectomycorrhizal fungi are more sensitive to high soil nitrogen levels in forests exposed to nitrogen deposition
Jörgensen, Karolina ; Clemmensen, Karina E. ; Wallander, Håkan LU
and Lindahl, Björn D.
(2024)
In New Phytologist
- Abstract
Ectomycorrhizal fungi are essential for nitrogen (N) cycling in many temperate forests and responsive to anthropogenic N addition, which generally decreases host carbon (C) allocation to the fungi. In the boreal region, however, ectomycorrhizal fungal biomass has been found to correlate positively with soil N availability. Still, responses to anthropogenic N input, for instance through atmospheric deposition, are commonly negative. To elucidate whether variation in N supply affects ectomycorrhizal fungi differently depending on geographical context, we investigated ectomycorrhizal fungal communities along fertility gradients located in two nemo-boreal forest regions with similar ranges in soil N : C ratios and inorganic N availability... (More)
Ectomycorrhizal fungi are essential for nitrogen (N) cycling in many temperate forests and responsive to anthropogenic N addition, which generally decreases host carbon (C) allocation to the fungi. In the boreal region, however, ectomycorrhizal fungal biomass has been found to correlate positively with soil N availability. Still, responses to anthropogenic N input, for instance through atmospheric deposition, are commonly negative. To elucidate whether variation in N supply affects ectomycorrhizal fungi differently depending on geographical context, we investigated ectomycorrhizal fungal communities along fertility gradients located in two nemo-boreal forest regions with similar ranges in soil N : C ratios and inorganic N availability but contrasting rates of N deposition. Ectomycorrhizal biomass and community composition remained relatively stable across the N gradient with low atmospheric N deposition, but biomass decreased and the community changed more drastically with increasing N availability in the gradient subjected to higher rates of N deposition. Moreover, potential activities of enzymes involved in ectomycorrhizal mobilisation of organic N decreased as N availability increased. In forests with low external input, we propose that stabilising feedbacks in tree-fungal interactions maintain ectomycorrhizal fungal biomass and communities even in N-rich soils. By contrast, anthropogenic N input seems to impair ectomycorrhizal functions.
(Less)
- author
- Jörgensen, Karolina
; Clemmensen, Karina E.
; Wallander, Håkan
LU
and Lindahl, Björn D.
- organization
- publishing date
- 2024
- type
- Contribution to journal
- publication status
- epub
- subject
- keywords
- coniferous forest, ectomycorrhizal communities, enzyme activities, ergosterol, fungal biomass, nitrogen deposition
- in
- New Phytologist
- pages
- 14 pages
- publisher
- Wiley-Blackwell
- external identifiers
-
- pmid:38213001
- scopus:85182214476
- ISSN
- 0028-646X
- DOI
- 10.1111/nph.19509
- language
- English
- LU publication?
- yes
- id
- bf0197b7-c7bc-4fa2-b0c0-f138cb7835a9
- date added to LUP
- 2024-02-19 12:11:29
- date last changed
- 2024-04-19 14:12:27
@article{bf0197b7-c7bc-4fa2-b0c0-f138cb7835a9,
abstract = {{<p>Ectomycorrhizal fungi are essential for nitrogen (N) cycling in many temperate forests and responsive to anthropogenic N addition, which generally decreases host carbon (C) allocation to the fungi. In the boreal region, however, ectomycorrhizal fungal biomass has been found to correlate positively with soil N availability. Still, responses to anthropogenic N input, for instance through atmospheric deposition, are commonly negative. To elucidate whether variation in N supply affects ectomycorrhizal fungi differently depending on geographical context, we investigated ectomycorrhizal fungal communities along fertility gradients located in two nemo-boreal forest regions with similar ranges in soil N : C ratios and inorganic N availability but contrasting rates of N deposition. Ectomycorrhizal biomass and community composition remained relatively stable across the N gradient with low atmospheric N deposition, but biomass decreased and the community changed more drastically with increasing N availability in the gradient subjected to higher rates of N deposition. Moreover, potential activities of enzymes involved in ectomycorrhizal mobilisation of organic N decreased as N availability increased. In forests with low external input, we propose that stabilising feedbacks in tree-fungal interactions maintain ectomycorrhizal fungal biomass and communities even in N-rich soils. By contrast, anthropogenic N input seems to impair ectomycorrhizal functions.</p>}},
author = {{Jörgensen, Karolina and Clemmensen, Karina E. and Wallander, Håkan and Lindahl, Björn D.}},
issn = {{0028-646X}},
keywords = {{coniferous forest; ectomycorrhizal communities; enzyme activities; ergosterol; fungal biomass; nitrogen deposition}},
language = {{eng}},
publisher = {{Wiley-Blackwell}},
series = {{New Phytologist}},
title = {{Ectomycorrhizal fungi are more sensitive to high soil nitrogen levels in forests exposed to nitrogen deposition}},
url = {{http://dx.doi.org/10.1111/nph.19509}},
doi = {{10.1111/nph.19509}},
year = {{2024}},
}