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Patterns of dissolved organic carbon and nitrogen fluxes in deciduous and coniferous forests under historic high nitrogen deposition

Steven Sleutel UGent, Jeroen Vandenbruwane, An De Schrijver UGent, Karen Wuyts UGent, Bram Moeskops UGent, Kris Verheyen UGent and Stefaan De Neve UGent (2009) BIOGEOSCIENCES. 6(12). p.2743-2758
abstract
Numerous recent studies have indicated that dissolved organic carbon (DOC) and nitrogen (DON) play an important role in C and N cycling in natural ecosystems, and have shown that N deposition alters the concentrations and fluxes of dissolved organic substances and may increase leaching losses from forests. Our study was set up to accurately quantify concentrations and flux patterns of DOC, DON and dissolved inorganic nitrogen (DIN) in deciduous and coniferous forest in Flanders, Belgium, under historical high nitrogen deposition. We measured DOC, DON and DIN concentrations at two weekly intervals in a silver birch (SB) stand, a corsican pine (CP) stand and a pine stand with higher N deposition (CPN), and used the SWAP model (calibrated with PEST) for generating accurate water and matter fluxes. The input with precipitation was an important source of DON, but not for DOC. Release of DOC from the forest floor was minimally affected by forest type, but higher N deposition (CPN stand) caused an 82% increase of DOC release from the forest floor. Adsorption to mineral soil material rich in iron and/or aluminum oxyhydroxides was suggested to be the most important process removing DOC from the soil solution, responsible for substantial retention (67–84%) of DOC entering the mineral soil profile with forest floor leachate. Generally, DON was less reactive (i.e. less removal from the soil solution) than DOC, resulting in decreasing DOC/DON ratios with soil depth. We found increased DOC retention in the mineral soil as a result of higher N deposition (84 kg ha−1 yr−1 additional DOC retention in CPN compared to CP). Overall DON leaching losses were 2.2, 3.3 and 5.0 kg N yr−1 for SB, CP and CPN, respectively, contributing between 9–28% to total dissolved N (TDN) leaching. The relative contribution to TDN leaching from DON loss from SB and CP was mainly determined by (large) differences in DIN leaching. The large TDN leaching losses are alarming, especially in the CPN stand that was N saturated.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
INORGANIC NITROGEN, SOIL SOLUTION, THROUGHFALL, DYNAMICS, TEMPERATE FORESTS, NORWAY SPRUCE, MINERAL SOIL, N DEPOSITION, MATTER, WATER
journal title
BIOGEOSCIENCES
Biogeosciences
volume
6
issue
12
pages
2743 - 2758
Web of Science type
Article
Web of Science id
000273060100002
JCR category
GEOSCIENCES, MULTIDISCIPLINARY
JCR impact factor
3.246 (2009)
JCR rank
14/151 (2009)
JCR quartile
1 (2009)
ISSN
1726-4170
language
English
UGent publication?
yes
classification
A1
copyright statement
I have retained and own the full copyright for this publication
id
840864
handle
http://hdl.handle.net/1854/LU-840864
alternative location
http://www.biogeosciences.net/6/2743/2009/
date created
2010-01-27 09:22:04
date last changed
2010-02-03 15:13:04
@article{840864,
  abstract     = {Numerous recent studies have indicated that dissolved organic carbon (DOC) and nitrogen (DON) play an important role in C and N cycling in natural ecosystems, and have shown that N deposition alters the concentrations and fluxes of dissolved organic substances and may increase leaching losses from forests. Our study was set up to accurately quantify concentrations and flux patterns of DOC, DON and dissolved inorganic nitrogen (DIN) in deciduous and coniferous forest in Flanders, Belgium, under historical high nitrogen deposition. We measured DOC, DON and DIN concentrations at two weekly intervals in a silver birch (SB) stand, a corsican pine (CP) stand and a pine stand with higher N deposition (CPN), and used the SWAP model (calibrated with PEST) for generating accurate water and matter fluxes. The input with precipitation was an important source of DON, but not for DOC. Release of DOC from the forest floor was minimally affected by forest type, but higher N deposition (CPN stand) caused an 82\% increase of DOC release from the forest floor. Adsorption to mineral soil material rich in iron and/or aluminum oxyhydroxides was suggested to be the most important process removing DOC from the soil solution, responsible for substantial retention (67--84\%) of DOC entering the mineral soil profile with forest floor leachate. Generally, DON was less reactive (i.e. less removal from the soil solution) than DOC, resulting in decreasing DOC/DON ratios with soil depth. We found increased DOC retention in the mineral soil as a result of higher N deposition (84 kg ha\ensuremath{-}1 yr\ensuremath{-}1 additional DOC retention in CPN compared to CP). Overall DON leaching losses were 2.2, 3.3 and 5.0 kg N yr\ensuremath{-}1 for SB, CP and CPN, respectively, contributing between 9--28\% to total dissolved N (TDN) leaching. The relative contribution to TDN leaching from DON loss from SB and CP was mainly determined by (large) differences in DIN leaching. The large TDN leaching losses are alarming, especially in the CPN stand that was N saturated.},
  author       = {Sleutel, Steven and Vandenbruwane, Jeroen and De Schrijver, An and Wuyts, Karen and Moeskops, Bram and Verheyen, Kris and De Neve, Stefaan},
  issn         = {1726-4170},
  journal      = {BIOGEOSCIENCES},
  keyword      = {INORGANIC NITROGEN,SOIL SOLUTION,THROUGHFALL,DYNAMICS,TEMPERATE FORESTS,NORWAY SPRUCE,MINERAL SOIL,N DEPOSITION,MATTER,WATER},
  language     = {eng},
  number       = {12},
  pages        = {2743--2758},
  title        = {Patterns of dissolved organic carbon and nitrogen fluxes in deciduous and coniferous forests under historic high nitrogen deposition},
  url          = {http://www.biogeosciences.net/6/2743/2009/},
  volume       = {6},
  year         = {2009},
}

Chicago
Sleutel, Steven, Jeroen Vandenbruwane, An De Schrijver, Karen Wuyts, Bram Moeskops, Kris Verheyen, and Stefaan De Neve. 2009. “Patterns of Dissolved Organic Carbon and Nitrogen Fluxes in Deciduous and Coniferous Forests Under Historic High Nitrogen Deposition.” Biogeosciences 6 (12): 2743–2758.
APA
Sleutel, S., Vandenbruwane, J., De Schrijver, A., Wuyts, K., Moeskops, B., Verheyen, K., & De Neve, S. (2009). Patterns of dissolved organic carbon and nitrogen fluxes in deciduous and coniferous forests under historic high nitrogen deposition. BIOGEOSCIENCES, 6(12), 2743–2758.
Vancouver
1.
Sleutel S, Vandenbruwane J, De Schrijver A, Wuyts K, Moeskops B, Verheyen K, et al. Patterns of dissolved organic carbon and nitrogen fluxes in deciduous and coniferous forests under historic high nitrogen deposition. BIOGEOSCIENCES. 2009;6(12):2743–58.
MLA
Sleutel, Steven, Jeroen Vandenbruwane, An De Schrijver, et al. “Patterns of Dissolved Organic Carbon and Nitrogen Fluxes in Deciduous and Coniferous Forests Under Historic High Nitrogen Deposition.” BIOGEOSCIENCES 6.12 (2009): 2743–2758. Print.