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International conference, Freiburg-im-Brisgau, « Impact of the drought and heat 2003 on forests »

Sécheresse et canicule
17 Novembre 200419 Novembre 2004


Besides visible, immediate or short-term impacts of drought and heat on forests, there are further effects to be expected in the medium and logn-terme. While numerous investigations have been undertaken on various topics to assess the impacts of drought on forests, a synthesis is needed. For this purpose, French and German scientists have initiated the « drought 2003 » expertise , involving scientists of different disciplines and countries; The scientific conference of Freiburg aimed to present and discuss the first results of this expertise. A total of 46 presentations and 16 posters were proposed to the 115 participants from 14 coountries (Germany, France, Switzerland, Italy, Slovaquia, Finland, Romania, Denmark, USA, Sweden, Australia, Russia, Austria and Spain).


Institute for Forest Growth (IWW), Faculty of Forest and Environmental Sciences, Albert-Ludwigs-University, Freiburg-im-Breisgau, Germany

Forest Research Institute, Baden-Würtemberg (FVA), Freiburg-im-Breisgau, Germany

Groupement d’Intérêt Public ECOFOR , Paris, France

IUFRO Unit 4.01.08: Effects of the environmental changes on forest growth

European forest Institute (EFI)


17 November 2004

9h00-10h30 Konstantin von Teuffel (FVA)

Siegfried Fink (Albert-Ludwigs-University of freiburg)

Thomas Haussmann (German Federal Ministry of Consumer Protection, Food and Agriculture)

Jean-Luc Flot (French MInistry of Agriculture, Food, Fishery and Rural Affairs)

Guy Landmann (ECOFOR)

Heinrich Spiecker (IUFRO)





Official welcome addresses

11h00-11h30 M. Rebetez, H. Mayer, O. Dupont, D. Schindler, K. Gartner, J. Kropp, A. Menzel Heat and drought: a climate analysis Fichier à téléchargerFichier à télécharger
11h30-12h00 N. Kraüchi, H. Jeanjean The potential of in-situ and remote sensing activities to address drought effects on forest ecosystems Fichier à téléchargerFichier à télécharger
12h00-12h30 M.-L. Desprez-Loustau, B. Marçais, D. Piou, A. Vanini Enhanced effects of forests pathogens promoted by drought: patterns, mechanisms and focus on a few case studies Fichier à téléchargerFichier à télécharger
14h00-14h30 N. Bréda, H. Rennenberg, A. Granier, B. Longdoz, H. Cochard, B. Köstner, S. Rambal, R. Matyssek Ecophysiological response of forest trees ans stands to drought and heat Fichier à télécharger
14h30-15h00 H.-P. Kahle, R. Unseld Impacts of drought and heat an trees and forest growth. A synthesis of studies on short-, medium- and long-term effects ppbserved under temperate climatic conditions Fichier à téléchargerFichier à télécharger
15h00-15h30 K. von Wilpert Drought and soil processes Fichier à télécharger
15h30-16h00 V. Wolters, F. Archaux Drought and forest biodiversity Fichier à téléchargerFichier à télécharger
16h30-17h00 L. Ibanez, J.-L. peyron, S. Couture Socio-economic impacts of natural or human threats on the forest sector: some results of the Frenc-German expertsie on drought and heat 2003 Fichier à téléchargerFichier à télécharger
17h00-17h30 B. Roman-Amat can foresters better cope with severe drought episodes? Fichier à télécharger
17h30-17h45 G. Landmann Summarizing conclusions Fichier à télécharger

18 November 2004

Time Speaker Title
Session A: Meteorological aspects, forest monitoring
8h30-8h55 A. Menzel A 500 year pheno-climatological view on the 2003 heat wave in Europe assessed by grape harvest dates
8h55-9h20 I. Barbu, I. popa The regime of precipitation in 2003 inromanian forests Fichier à téléchargerFichier à télécharger
9h20-9h45 W. Werner, H.-W. Schröck, J. Block 10-yaers time series of climate parameters and ozone flux and their effects on growth of beech and spruce in Rhineland Palatinate
9h45-10h10 D. Schindler, B. Köstner, H. Mayer Drought 2003 in a Scots pine forest
10h45-11h10 K. Gartner, M. Neumann Impact of the heat and drought 2003 on ecological parameters and growth in Austrian forests Fichier à téléchargerFichier à télécharger
11h10-11h35 S. Goodrick, Y. Liu, J. Stanurf Spatial modelling of drought using artificial neural networks Fichier à téléchargerFichier à télécharger
11h35-12h00 S. Raspe, H.-P. Dietrich, G. Dobler, G. Gietl, W. Grimmeisen, F. Kroll, B. Schulze, C. Schultz, A. Schubert Bavarian forest ecosystem monitoring program: a useful tool to analyse the drought 2003 and its effets on forests Fichier à téléchargerFichier à télécharger
12h00-12h25 E. Graf-Pannatier, M. Dobbertin, A. Brechbühl, M. Schmitt, A. Thimonier, P. Waldner, N. Kraüchi Effects of water deficit on tree growth, leaf discolouration and litter fall in Swiss ICP-Forest level II plots Fichier à téléchargerFichier à télécharger
Session B: Pest and diseases, fire, ozone
8h30-8h55 H. Schröter Direct and susequent damages caused by the drought 2003 in the forest of Baden-Württemberg
8h55-9h20 A. Battisti, A. Aimi, F. Barito, I. Bernardinelli, E. Buffo, M. Cappucci, E. Petrucco Toffolo, F. Stergulc Range expansion of the pine processionary moth: the effects of the high temperature of the summer 2003 Fichier à télécharger
9h20-9h45 H. Delb Infestation of bark-bredding beetles on beech as a consequence of drought and heat
9h45-10h10 B. Metzler Armillaria infection following drought in forest stands Fichier à télécharger
Fichier à télécharger
10h45-11h10 H. Jactel, J. Petit, D. Piou, M.-L. Desprez-Loustau A meta-analysis of forest pest and disease response to water stress
11h10-11h35 J. San-Miguel-Ayanz, B. Barbosa, A. Camia, G. Liberta, G. Schmuck Analysis of forest fire damages in the year 2003 trought the European Forest Fire Information System(EFFIS)
11h35-12h00 J. Goldammer, A.-C. Held Heat, drought and wild land fires in Eurasia in 2003 Fichier à téléchargerFichier à télécharger
12h00-12h25 M.-S. Günthardt-Goerg, M. Laverrière, P. Vollenweider Ozone and/or drought: differences or similarities in leaf tissues?
Session C: Drought effects on forest growth
8h30-8h55 W. Beck, J. Müller, S. Anders Impacts of the drought 2003 on forest condition in Germany. Results of a study by the Federal Ministry of Consumer Protection, Fodd and Agriculture
8h55-9h20 M. Vennetier, B. Villa, T. Keller, L. Eryan, F. Guibal Impact of 2003 climate conditions on radial growth and state of health according to soil water balance for the main coniferous species of French Mediterranean area
9h20-9h45 P. Cherubini, M. Nötzli, N. Stary, M. Saurer, R. Siegwolf, N. Kraüchi, S. Minerbi Tree rings reveal prolonged stress prior to drought -induced tree death Fichier à télécharger
9h45-10h10 A. Zingg, P. Cherubini, A. Rigling, A. Bürgi Growth reactions of beech, Norway spruce and silver fir after summer drought: analyses from old growth and yield data of Switzerland Fichier à télécharger
10h45-11h10 C. Dittmar Drought signals in tree rings – markers in the past scenarios for future risks
11h10-11h35 V. Badeau, N. Bréda, F. Lebourgeois, A. Granier, J.-L. Dupouey Tree radial growth response to climate: a synthetic study of pointer years in french forests
11h35-12h00 P. Rozenberg, L. Pâques Evidence of the effect of the climate of year 2003 on Douglas-fir and larch wood formation in Ffrance
12h00-12h25 A. Bolte, T. Czajkowski IMpact of severe drought on beech regeneration in Germany. Are Polish provenances more adaptative?
Discussion corners
14h00-16h00 Moderator: Marcus Lindner Carbon and water cycle monitoring networks. Potential contribution to our understanding of the impact of drought and climate hazards on the processes of primary productivity in forests Fichier à télécharger
14h00-16h00 Moderator: Norbert Kraüchi / Thomas Haussmann Forest health and growth networks. Contribution to the assessment of the impact of climatic hazards Fichier à télécharger
14h00-16h00 Moderator: Erwin Dreyer Delayed effects of climatic hazards on tree growth and health. Importance ond a few hypotheses for the physiological basis Fichier à télécharger
Poster presentations: various drought effects on forests
16h00-18h00 A.P. Tsarev Influence of droughty conditions on a state of poplars
R. Jakus, L. Kulla, M. Turcani, R. Leontovyc, J. Novotny, J. Gaper, M. Blazenec, P. Balaz, M. Jeazik Intensive spruce forest decline in northerne Slovaquia: symptoms, localization and possible causes and mitigation measures
M. Sarvas The effect of drought on artificial regeneration in Slovaquia in 2003 and the possibilities to increase plant adaptability after plantation in Cental Europe Fichier à téléchargerFichier à télécharger
I. Barbu, I. Popa Drought risk monitoring research program in Romanian forests Fichier à téléchargerFichier à télécharger
I.M. Thomsen Drought as a factor in forest health in Denmark Fichier à télécharger
A. Bastrup-Birk Effects of drought on the hydrology of different forest stands in Denmark
M. Löw, A.J. Nunn, I.M. Reiter, C. Heerdt, T. Grams, K.-H. Häberle, R. Matyssek Diagnostics in beech exposed to chronic free-air ozone fumigation in the excptional summer 2003: ozone uptake and gas exchange responses of adult trees Fichier à télécharger
J. Block, F. Engels Diameter shrinkage as a reaction of spruce (Picea abies L.) and oak (Quercus petraea L.) on drought stress in summer 2003 Fichier à téléchargerFichier à télécharger
P. Saccone, J.J. Brun, J.P. Pages, R. Michalet Drought 2003 impact on sapling mountain forest trees: results of an experimental design
M. Poirier, C. Bodet, T. Ameglio Impact of summer conditions of growth (drought, defoliation…) on freezing tolerance of trees Fichier à téléchargerFichier à télécharger
Y. Caraglio, C. Drénou, E. Nicolini Structural diagnostic of drought effects on forest tree vitality. An pproach combining crown transparency and architecture
J.-L. Dupouey, J.-F. Picard, F. Forgeard, M. Lebret, J.-F. dobremez, L. Boujot, S. Camaret Interannual variations of forest vegetaion communities
E. Eccel, C. Salvadori, N. La Porta A water balance model on an oak mixed forest in the italian Alps: effects of the unprecedented drought of summer 2003 Fichier à téléchargerFichier à télécharger
Y. Liu, J. Stanturf, S. Goodrick Modelling ecosystems water stress and fire risk under drought conditions
P. Lasch, F.-W. Badeck, Y.Hauf, F. Suckow Forest firee risk in Brandenbourg and Baden-Württemberg under climate change conditions
R.A. Petta, T. Ohara Environmental GIS database for desertification studies in the Brazilian North-eastern areaas

19 November 2004

Time Speaker
Session D: Water balance and tree physiology
8h30-8h50 N. Bréda Understanding time lag effets of the drougth 2003 on physiological and phenological behaviour in oak and beech trees
8h50-9h10 B. Köstner, D. Gerold, T. Grünwald, C. Bernhofer Drought effects on the carbon and water fluxes of Norway spruce (Picea abies) at the tree and stand level: comparison of 2003 with preceding years
9h10-9h30 A. Granier, P. Berbigier, R. Ceulemans, T. Grünwald, B. Heinesch, A. Kohl, B. Köstner, D. Loustau, K. Pilegaard, M. Reichstein, T. Vesala, Q. Wang, J. Tenhunen The drought of 2003 in Westerne Europe: consequences on forest ecosystems functioning
9h30-9h50 D. Epron, H. Ghouil, G. Daas, F. Froux, C. Warren, E. Dreyer Responses of photosynthsis to high temperatures in trees: acclimatation of the thermal break point of photochemistry to heat and drought
9h50-10h10 M.-B. Bogeat-Triboulot, D. Le Thiec, D. hukin, H. cochard, E. Dreyer Drought responses in Populus euphratica: effects on water relation, growth, hydraulic properties and gas exchange
Session E: Soil processes
8h30-8h55 K. v. Wilpert Potassium deficiency as nduced by drought
8h55-9h20 B. Schultze, H.-P. Dietrich, W. Grimmeisen, S. Raspe Examination and advancement of soil water balance parameters by soil water content measurements in the drought 2003 Fichier à téléchargerFichier à télécharger
9h20-9h45 C. Schultz, S. Raspe, B. Schultze Drought effects on soil solution chemistry at Bavarian Level II plots Fichier à téléchargerFichier à télécharger
9h45-10h10 P. Balaz, K. Strelcova, M. Blazenec, R. Pokorny, Z. Klimankova Species-Specific method of short-term drought stress level assement
Session F: Tree nutrition, root dynamics
8h30-8h55 M. Nahm, A. Gessler, H. rennenberg Consequences of the 2003 drought on nitrogen nutrition and water balance of adult European beech (Fagus sylvatica L.) on calcareous soil
8h55-9h20 H.S. Helmisaari, P. Nödj, I. Lumme Norway spruce fine roots and seasonnal drought. Results of a three-year field experience in Southern Finland Fichier à téléchargerFichier à télécharger
9h20-9h45 R. Mainiero, M. Kazda, I. schmidt Fine root dynamics of Fagus sylvatica: interacting effects of soil temperature, drought and ozone treatment Fichier à téléchargerFichier à télécharger
9h45-10h10 P. Nikolova, K.-H. Häberle, H. Blaschke, R. Matyssek The exceptional summer of 2003 as a texte scenario for the root competition between adult becch and sprucee forest trees Fichier à télécharger
Plenary session: conference review and conclusions
11h00-12h30 M. Lindner, N. Kraüchi, E. Dreyer Resuls of the discussion corners Fichier à téléchargerFichier à téléchargerFichier à télécharger
12h30-13h00 H. Speicker Conference review and summarizing conclusions