Application of nitrogen fertilizer to a boreal pine forest has a negative impact on the respiration of ectomycorrhizal hyphae
(2012) In Plant and Soil 352(1-2). p.405-417- Abstract
- Aims There is evidence that increased N inputs to boreal forests, via atmospheric deposition or intentional fertilization, may impact negatively on ectomycorrhizal (ECM) fungi leading to a reduced flux of plant-derived carbon (C) back to the atmosphere via ECM. Our aim was to investigate the impact of N fertilization of a Pinus sylvestris (L.) forest stand on the return of recently photoassimilated C via the ECM component of soil respiration. Methods We used an in situ, large-scale, C-13-CO2 isotopic pulse labelling approach and monitored the C-13 label return using soil gas efflux chambers placed over three different types of soil collar to distinguish between heterotrophic (R-H), autotrophic (R-A; partitioned further into contributions... (More)
- Aims There is evidence that increased N inputs to boreal forests, via atmospheric deposition or intentional fertilization, may impact negatively on ectomycorrhizal (ECM) fungi leading to a reduced flux of plant-derived carbon (C) back to the atmosphere via ECM. Our aim was to investigate the impact of N fertilization of a Pinus sylvestris (L.) forest stand on the return of recently photoassimilated C via the ECM component of soil respiration. Methods We used an in situ, large-scale, C-13-CO2 isotopic pulse labelling approach and monitored the C-13 label return using soil gas efflux chambers placed over three different types of soil collar to distinguish between heterotrophic (R-H), autotrophic (R-A; partitioned further into contributions from ECM hyphae and total R-A) and total (R-S) soil respiration. Results The impact of N fertilization was to significantly reduce R-A, particularly respiration via extramatrical ECM hyphae. ECM hyphal flux in control plots showed substantial spatial variability, resulting in mean flux estimates exceeding estimates of total R-A, while ECM contributions to R-A in N treated plots were estimated at around 30%. Conclusion Significant impacts on soil C cycling may be caused by reduced plant C allocation to ECM fungi in response to increased N inputs to boreal forests; ecosystem models so far lack this detail. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4643918
- author
- Vallack, Harry W. ; Leronni, Vincenzo ; Metcalfe, Dan LU ; Hogberg, Peter ; Ineson, Phil and Subke, Jens-Arne
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- (CO2)-C-13, Pulse labelling, Soil CO2 efflux, Ectomycorrhizas, Soil, respiration, Boreal forest
- in
- Plant and Soil
- volume
- 352
- issue
- 1-2
- pages
- 405 - 417
- publisher
- Springer
- external identifiers
-
- wos:000302421300029
- scopus:84858006168
- ISSN
- 0032-079X
- DOI
- 10.1007/s11104-011-1005-6
- language
- English
- LU publication?
- no
- id
- 011d8feb-9164-4279-8a72-0099cf44ca12 (old id 4643918)
- date added to LUP
- 2016-04-01 13:33:24
- date last changed
- 2022-01-27 19:47:33
@article{011d8feb-9164-4279-8a72-0099cf44ca12,
abstract = {{Aims There is evidence that increased N inputs to boreal forests, via atmospheric deposition or intentional fertilization, may impact negatively on ectomycorrhizal (ECM) fungi leading to a reduced flux of plant-derived carbon (C) back to the atmosphere via ECM. Our aim was to investigate the impact of N fertilization of a Pinus sylvestris (L.) forest stand on the return of recently photoassimilated C via the ECM component of soil respiration. Methods We used an in situ, large-scale, C-13-CO2 isotopic pulse labelling approach and monitored the C-13 label return using soil gas efflux chambers placed over three different types of soil collar to distinguish between heterotrophic (R-H), autotrophic (R-A; partitioned further into contributions from ECM hyphae and total R-A) and total (R-S) soil respiration. Results The impact of N fertilization was to significantly reduce R-A, particularly respiration via extramatrical ECM hyphae. ECM hyphal flux in control plots showed substantial spatial variability, resulting in mean flux estimates exceeding estimates of total R-A, while ECM contributions to R-A in N treated plots were estimated at around 30%. Conclusion Significant impacts on soil C cycling may be caused by reduced plant C allocation to ECM fungi in response to increased N inputs to boreal forests; ecosystem models so far lack this detail.}},
author = {{Vallack, Harry W. and Leronni, Vincenzo and Metcalfe, Dan and Hogberg, Peter and Ineson, Phil and Subke, Jens-Arne}},
issn = {{0032-079X}},
keywords = {{(CO2)-C-13; Pulse labelling; Soil CO2 efflux; Ectomycorrhizas; Soil; respiration; Boreal forest}},
language = {{eng}},
number = {{1-2}},
pages = {{405--417}},
publisher = {{Springer}},
series = {{Plant and Soil}},
title = {{Application of nitrogen fertilizer to a boreal pine forest has a negative impact on the respiration of ectomycorrhizal hyphae}},
url = {{http://dx.doi.org/10.1007/s11104-011-1005-6}},
doi = {{10.1007/s11104-011-1005-6}},
volume = {{352}},
year = {{2012}},
}