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Trends in soil solution dissolved organic carbon (DOC) 2 concentrations across European forests
Camino-Serrano, M. (Universiteit Antwerpen. Departement Biologie)
Graf Pannatier, E. (Swiss Federal Institute of Forest, Snow and Landscape Research)
Vicca, S. (Universiteit Antwerpen. Departement Biologie)
Luyssaert, S. (Laboratoire des Sciences du Climat et de l'Environment)
Jonard, M. (Université catholique de Louvain (1970-). Earth and Life Institute)
Ciais, Philippe (Laboratoire des Sciences du Climat et de L’Environnement)
Guenet, B. (Laboratoire des Sciences du Climat et de l'Environment)
Gielen, B. (Universiteit Antwerpen. Departement Biologie)
Peñuelas, Josep (Centre de Recerca Ecològica i Aplicacions Forestals)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Waldner, P. (Swiss Federal Institute of Forest, Snow and Landscape Research)
Etzold, S. (Swiss Federal Institute of Forest, Snow and Landscape Research)
Cecchini, G. (Università di Genova. Dipartimento di Scienze della Terra)
Clarke, N. (Norsk institutt for bioøkonomi, Serbia)
Galić, Z. (University of Novi Sad-Institute of Lowland Forestry and E nviroment)
Gandois, L. (Centre national de la recherche scientifique (França). EcoLab)
Hansen, K. (Institutet för vatten- och luftvårdsforskning (Sweden))
Johnson, J. (University College Dublin. School of Agriculture and Food Science)
Klinck, U. (Nordwestdeutsche Forstliche Versuchsanstalt)
Lachmanová, Z. (Alice Holt Forest (England). Centre for Ecosystem, Society and Biosecurity, Forest Research)
Lindroos, A. J. (Luonnonvarakeskus (Luke))
Meesenburg, Henning (Nordwestdeutsche Forstliche Versuchsanstalt)
Nieminen, T. M. (Luonnonvarakeskus (Luke))
Sanders, Tanja GM (Thünen Institute of Forest Ecosystems)
Sawicka, K. (University of Reading. Department of Geography and Environmental Science)
Seidling, W. (Thünen Institute of Forest Ecosystems)
Thimonier, A. (Swiss Federal Institute of Forest, Snow and Landscape Research)
Vanguelova, E. Alice Holt Forest (England). Centre for Ecosystem, Society and Biosecurity, Forest Research
Verstraeten, A. (Instituut voor Natuur- en Bosonderzoek)
Vesterdal, L. (Københavns universitet. Institut for Geovidenskab of Naturforvaltning)
Janssens, Ivan A. (Universiteit Antwerpen. Departement Biologie)

Data: 2016
Resum: Dissolved organic carbon (DOC) in soil solution is connected to DOC in surface waters through hydrological flows. Therefore, it is expected that long-term dynamics of DOC in surface waters reflect DOC trends in soil solution. However, a multitude of site-studies has failed so far to establish consistent trends in soil solution DOC, whereas increasing concentrations in European surface waters over the past decades appear to be the norm, possibly as a result from acidification recovery. The objectives of this study were therefore to understand the long-term trends of soil solution DOC from a large number of European forests (ICP Forests Level II plots) and determine their main physico-chemical and biological controls. We applied trend analys is at two levels: 1) to the entire European dataset and 2) to the individual time series and related trends with plot characteristics, i. e. , soil and vegetation properties, soil solution chemistry and atmospheric deposition loads. Analyses of the entire dataset showed an overall increasing trend in DOC concentrations in the organic layers, but, at individual plots and depths, there was no clear overall trend in soil solution DOC across Europe with temporal slopes of soil solution DOC ranging between −16. 8 % yr⁻¹ and +23 % yr⁻¹ (median= +0. 4 % yr⁻¹). The non-significant trends (40 %) outnumbered the increasing (35 %) and decreasing trends (25 %) across the 97 ICP Forests Level II sites. By means of multivariate statistics, we found increasing DOC concentrations with increasing mean nitrate (NO₃⁻) deposition and decreasing DOC concentrations with decreasing me an sulphate (SO₄²⁻) deposition, with the magnitude of these relationships depending on plot deposition history. While the attribution of increasing trends in DOC to the reduct ion of SO₄²⁻ deposition could be confirmed in N-poorer forests, in agreement with observations in surface waters, this was not the case in N-richer forests. In conclusion, long-term trends of soil solution DOC reflected the interactions between controls acting at local (soil and vegetation properties) and regional (atmospheric deposition of SO₄²⁻ and inorganic N) scales.
Nota: Número d'acord de subvenció EC/FP7/610028
Nota: Número d'acord de subvenció EC/FP6/505539
Nota: Número d'acord de subvenció EC/LIFE07 ENV/D/000218
Drets: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Llengua: Anglès
Document: article ; recerca ; publishedVersion
Matèria: Dissolved organic carbon ; Europe ; Forest
Publicat a: Biogeosciences Discussions, 26 Jan 2016, ISSN 1810-6277

DOI: 10.5194/bg-2015-632

48 p, 1.2 MB

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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
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 Registre creat el 2016-01-27, darrera modificació el 2016-06-04

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