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Faculty for Biology, Chemistry and Earth Sciences

Soil Ecology - Prof. Dr. Eva Lehndorff

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Production and Transport of organic solutes: Effects of natural climatic variation (PROTOS)

PROTOS

to 12/1997

Principal Investigator: Egbert Matzner
Staff: Birgitta Brunner, Beate Michalzik
Grant: ENV4-CT95-0010 Production and transport of organic solutes: effects of natural climatic variation (PROTOS)

PROTOS
Climate and the Dynamics of Dissolved Organic Carbon (DOC) in European Forests
J. Mulder1, J.F. Gallardo2, E. Matzner3, E. Tipping4, C. Bryant5, N. Clarke1, S. Lofts4, B. Michalzik3 & M. A. Vicente2
1Norw. Forest Res. Inst., Ås, Norway; 2CSIC, Salamanca, Spain; 3Bayreuth Inst. Terrestrial Ecosystem Res., Bayreuth, Germany;  4Inst. Freshwater Ecol., Windermere, UK & 5NERC Radiocarbon Lab, Glasgow, UK
Background
    DOC in soil :
  • Important factor : carbon balance of the forest
  • it is transferred to surface water
  • it has negative effects on water quality
  • is it controlled by bio-hydro-chemical processes
  • The processes are climate dependent
results
modelling
policy implications
Objectives
  • Measure DOC concentrations and fluxes
  • Quantify effect climatic differences
  • Identify parameters that control DOC fluxes
  • Determine key parameter values in the lab
  • Model organic C turnover & DOC transport 
Research sites Research 
Setup
  • Field data at all sites (DOC fluxes, 14C, climate)
  • Lab studies of production, decomposition and adsorption of DOC
  • Modelling of DOC transport
 
Dissolved organic matter (DOM), comprising carbon (DOC), nitrogen (DON) and phosphorus (DOP), plays a significant role in terrestrial and aquatic ecosystems. Climatic factors, especially temperature, moisture and water flux, influence concentrations and fluxes of DOM in and through ecosystems. Protos determines the effects of natural variations in climate and deposition on concentrations and fluxes of DOC, DON and DOP in forest ecosystems in a North-South transect across Europe. Results will be used to test hypotheses concerning controlling factors.


List of publications of this Project

Michalzik, B; Kalbitz, K; Park, J-H; Solinger, St; Matzner, E: Fluxes and concentrations of dissolved organic carbon and nitrogen - a synthesis for temperate forests, Biogeochemistry, 52(2), 173-205 (2001) -- Details
Stadler, B; Solinger, St; Michalzik, B: Insect herbivores and the nutrient flow from the canopy to the soil in coniferous and deciduous forests, Oecologia, 126, 104-113 (2001) -- Details
Stadler, B; Michalzik, B: Effects of phytophagous insects on micro-organisms and throughfall chemistry in forested ecosystems: herbivores as switches for the nutrient dynamics in the canopy., Basic and Applied Ecology, 1, 109-116 (2000) -- Details
Prechtel, A; Alewell, C; Michalzik, B; Matzner, E: Different effect of drying on the fluxes of dissolved organic carbon and nitrogen from a Norway spruce forest floor, Journal of Plant Nutr. Soil Sci., (2000) 163, 517-521 (2000) -- Details
Michalzik, B; Stadler, B: Effects of phytophagous insects on soil solution chemistry: herbivores as switches for the nutrient dynamics in the soil., Basic and Applied Ecology, 1, 117-123 (2000) -- Details
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