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Quantification of effects of season and nitrogen supply on tree below-ground carbon transfer to ectomycorrhizal fungi and other soil organisms in a boreal pine forest

Hogberg, Mona N.; Briones, Maria J. I.; Keel, Sonja G.; Metcalfe, Dan LU ; Campbell, Catherine; Midwood, Andrew J.; Thornton, Barry; Hurry, Vaughan; Linder, Sune and Nasholm, Torgny, et al. (2010) In New Phytologist 187(2). p.485-493
Abstract
P>The flux of carbon from tree photosynthesis through roots to ectomycorrhizal (ECM) fungi and other soil organisms is assumed to vary with season and with edaphic factors such as nitrogen availability, but these effects have not been quantified directly in the field. To address this deficiency, we conducted high temporal-resolution tracing of 13C from canopy photosynthesis to different groups of soil organisms in a young boreal Pinus sylvestris forest. There was a 500% higher below-ground allocation of plant C in the late (August) season compared with the early season (June). Labelled C was primarily found in fungal fatty acid biomarkers (and rarely in bacterial biomarkers), and in Collembola, but not in Acari and Enchytraeidae. The... (More)
P>The flux of carbon from tree photosynthesis through roots to ectomycorrhizal (ECM) fungi and other soil organisms is assumed to vary with season and with edaphic factors such as nitrogen availability, but these effects have not been quantified directly in the field. To address this deficiency, we conducted high temporal-resolution tracing of 13C from canopy photosynthesis to different groups of soil organisms in a young boreal Pinus sylvestris forest. There was a 500% higher below-ground allocation of plant C in the late (August) season compared with the early season (June). Labelled C was primarily found in fungal fatty acid biomarkers (and rarely in bacterial biomarkers), and in Collembola, but not in Acari and Enchytraeidae. The production of sporocarps of ECM fungi was totally dependent on allocation of recent photosynthate in the late season. There was no short-term (2 wk) effect of additions of N to the soil, but after 1 yr, there was a 60% reduction of below-ground C allocation to soil biota. Thus, organisms in forest soils, and their roles in ecosystem functions, appear highly sensitive to plant physiological responses to two major aspects of global change: changes in seasonal weather patterns and N eutrophication. (Less)
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published
subject
keywords
boreal pine forest, 13CO(2) labelling, ectomycorrhizal (ECM) fungi, nitrogen availability, seasonality, soil animals, soil CO2 efflux, soil, microbial cytoplasm
in
New Phytologist
volume
187
issue
2
pages
485 - 493
publisher
Wiley-Blackwell
external identifiers
  • wos:000279169900021
  • scopus:77954165516
ISSN
1469-8137
DOI
10.1111/j.1469-8137.2010.03274.x
language
English
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no
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8ff68d52-51cd-48ca-99d1-fddb147fa016 (old id 4643957)
date added to LUP
2014-09-26 07:45:36
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2018-07-08 03:17:46
@article{8ff68d52-51cd-48ca-99d1-fddb147fa016,
  abstract     = {P>The flux of carbon from tree photosynthesis through roots to ectomycorrhizal (ECM) fungi and other soil organisms is assumed to vary with season and with edaphic factors such as nitrogen availability, but these effects have not been quantified directly in the field. To address this deficiency, we conducted high temporal-resolution tracing of 13C from canopy photosynthesis to different groups of soil organisms in a young boreal Pinus sylvestris forest. There was a 500% higher below-ground allocation of plant C in the late (August) season compared with the early season (June). Labelled C was primarily found in fungal fatty acid biomarkers (and rarely in bacterial biomarkers), and in Collembola, but not in Acari and Enchytraeidae. The production of sporocarps of ECM fungi was totally dependent on allocation of recent photosynthate in the late season. There was no short-term (2 wk) effect of additions of N to the soil, but after 1 yr, there was a 60% reduction of below-ground C allocation to soil biota. Thus, organisms in forest soils, and their roles in ecosystem functions, appear highly sensitive to plant physiological responses to two major aspects of global change: changes in seasonal weather patterns and N eutrophication.},
  author       = {Hogberg, Mona N. and Briones, Maria J. I. and Keel, Sonja G. and Metcalfe, Dan and Campbell, Catherine and Midwood, Andrew J. and Thornton, Barry and Hurry, Vaughan and Linder, Sune and Nasholm, Torgny and Hogberg, Peter},
  issn         = {1469-8137},
  keyword      = {boreal pine forest,13CO(2) labelling,ectomycorrhizal (ECM) fungi,nitrogen availability,seasonality,soil animals,soil CO2 efflux,soil,microbial cytoplasm},
  language     = {eng},
  number       = {2},
  pages        = {485--493},
  publisher    = {Wiley-Blackwell},
  series       = {New Phytologist},
  title        = {Quantification of effects of season and nitrogen supply on tree below-ground carbon transfer to ectomycorrhizal fungi and other soil organisms in a boreal pine forest},
  url          = {http://dx.doi.org/10.1111/j.1469-8137.2010.03274.x},
  volume       = {187},
  year         = {2010},
}