Tree rings; Tree ring width; Stable C and O Isotopes; Process oriented approach; Natural archives; Environmental drivers; Modeling; Acclimation; Carbon cycle; Global changes
Keller Kathrin M., Lienert Sebastian, Bozbiyik Anil, Stocker Thomas F., Churakova (Sidorova) Olga V., Frank David C., Klesse Stefan, Koven Charles D., Leuenberger Markus, Riley William J., Saurer Matthias, Siegwolf Rolf, Weigt Rosemarie B., Joos Fortunat (2017), 20th century changes in carbon isotopes and water-use efficiency: tree-ring-based evaluation of the CLM4.5 and LPX-Bern models, in Biogeosciences
, 14(10), 2641-2673.
Brinkmann Nadine, Eugster Werner, Zweifel Roman, Buchmann Nina, Kahmen Ansgar (2016), Temperate tree species show identical response in tree water deficit but different sensitivities in sap flow to summer soil drying, in Tree Physiology
, 36(12), 1508-1519.
Zweifel Roman, Haeni Matthias, Buchmann Nina, Eugster Werner (2016), Are trees able to grow in periods of stem shrinkage?, in New Phytologist
, 211(3), 839-849.
Isaac-Renton M., Schneider L., Treydte K. (2016), Contamination risk of stable isotope samples during millingContamination risk of stable isotope samples during milling, in Rapid Communications in Mass Spectrometry
, 30(13), 1513-1522.
Keel Sonja G., Joos Fortunat, Spahni Renato, Saurer Matthias, Weigt Rosemarie B., Klesse Stefan (2016), Simulating oxygen isotope ratios in tree ring cellulose using a dynamic global vegetation model, in Biogeosciences
, 13(13), 3869-3886.
Klesse S., Etzold S., Frank D. (2016), Integrating tree-ring and inventory-based measurements of aboveground biomass growth: research opportunities and carbon cycle consequences from a large snow breakage event in the Swiss Alps, in European Journal of Forest Research
, 135(2), 297-311.
Giuggiola Arnaud, Ogée Jérôme, Rigling Andreas, Gessler Arthur, Bugmann Harald, Treydte Kerstin (2016), Improvement of water and light availability after thinning at a xeric site: which matters more? A dual isotope approach, in New Phytologist
, 210(1), 108-121.
Weigt Rosemarie B., Bräunlich Stephanie, Zimmermann Lothar, Saurer Matthias, Grams Thorsten E. E., Dietrich Hans-Peter, Siegwolf Rolf T.W., Nikolova Petia S. (2015), Comparison of δ 18 O and δ 13 C values between tree-ring whole wood and cellulose in five species growing under two different site conditions Comparing δ 18 O and δ 13 C values of tree-ring whole wood and cellulose, in Rapid Communications in Mass Spectrometry
, 29(23), 2233-2244.
Kimak Adam, Kern Zoltan, Leuenberger Markus (2015), Qualitative Distinction of Autotrophic and Heterotrophic Processes at the Leaf Level by Means of Triple Stable Isotope (C–O–H) Patterns, in Frontiers in Plant Science
, 6, 1008.
Klesse Stefan, Ziehmer Malin, Rousakis Georgios, Trouet Valerie, Frank David (2015), Synoptic drivers of 400 years of summer temperature and precipitation variability on Mt. Olympus, Greece, in Climate Dynamics
, 45(3-4), 807-824.
Kimak Adam, Leuenberger Markus (2015), Are carbohydrate storage strategies of trees traceable by early–latewood carbon isotope differences?, in Trees
, 29(3), 859-870.
Frank D. C., Poulter B., Saurer M., Esper J., Huntingford C., Helle G., Treydte K., Zimmermann N. E., Schleser G. H., Ahlström A., Ciais P., Friedlingstein P., Levis S., Lomas M., Sitch S., Viovy N., Andreu-Hayles L., Bednarz Z., Berninger F., Boettger T., D‘Alessandro C. M., Daux V., Filot M., Grabner M., et al. (2015), Water-use efficiency and transpiration across European forests during the Anthropocene, in Nature Climate Change
, 5(6), 579-583.
Liu Xiaohong, An Wenling, Treydte Kerstin, Wang Wenzhi, Xu Guobao, Zeng Xiaomin, Wu Guoju, Wang Bo, Zhang Xuanwen (2015), Pooled versus separate tree-ring δD measurements, and implications for reconstruction of the Arctic Oscillation in northwestern China, in Science of The Total Environment
, 511, 584-594.
Hartl-Meier C., Zang C., Buntgen U., Esper J., Rothe A., Gottlein A., Dirnbock T., Treydte K. (2015), Uniform climate sensitivity in tree-ring stable isotopes across species and sites in a mid-latitude temperate forest, in Tree Physiology
, 35(1), 4-15.
Loader N.J., Street-Perrott F.A., Daley T.J., Hughes P.D.M., Kimak A., Levanič T., Mallon G., Mauquoy D., Robertson I., Roland T.P., van Bellen S., Ziehmer M.M., Leuenberger M. (2015), Simultaneous Determination of Stable Carbon, Oxygen, and Hydrogen Isotopes in Cellulose, in Analytical Chemistry
, 87(1), 376-380.
John Roden, Ansgar Kahmen, Nina Buchmann, Rolf Siegwolf (2015), The enigma of effective path length for 18O enrichment in leaf water of conifers, in Plant, Cell & Environment
, 38, 2551-2565.
Saurer Matthias, Spahni Renato, Joos Fortunat, Leuenberger Markus, Loader Neil, McCarrol Danny, Gagen Mary, Puolter B, Siegwolf Rolf, Andreu-Hayles Laia, Boettger Tatjana, Dorado Linan I, Fairchild I, Gutierrez Emilie, Haupt M, Hilasvuori Emmi, Heinrich I, Helle Gerd, Grudd H, Jalkanen R, Levanic T, Linderholm H, Robertson Ian, Sonninen E, Treydte Kerstin (2014), Spatial variability and temporal trends in water-use efficiency of European forests, in Global Change Biology
, 20(12), 3700-3712.
Nehrbass-Ahles Christoph, Babst Flurin, Klesse Stefan, Nötzli Magdalena, Bouriaud Olivier, Neukom Raphael, Dobbertin Matthias, Frank David (2014), The influence of sampling design on tree-ring-based quantification of forest growth, in Global Change Biology
, 20(9), 2867-2885.
Treydte Kerstin, Boda Sonja, Graf Pannatier Elisabeth, Fonti Patrick, Frank David, Ullrich Bastian, Saurer Matthias, Siegwolf Rolf, Battipaglia Giovanna, Werner Willy, Gessler Arthur (2014), Seasonal transfer of oxygen isotopes from precipitation and soil to the tree ring: source water versus needle water enrichment, in New Phytologist
, 202(3), 772-783.
Kern Z., Kohán B., Leuenberger M. (2014), Precipitation isoscape of high reliefs: interpolation scheme designed and tested for monthly resolved precipitation oxygen isotope records of an Alpine domain, in Atmospheric Chemistry and Physics
, 14(4), 1897-1907.
Cernusak Lucas, Kahmen Ansgar (2013), The multifaceted relationship between leaf water 18O enrichment and transpiration rate, in Plant Cell and Environment
, Volume 36(Issue 7), 1239-1241.
John Roden, Rolf Siegwolf (2012), Is the dual-isotope conceptual model fully operational?, in Tree Physiology
, 32, 1179-1182.
G. Tomlinson, P.Waldner, R. Siegwolf, B Rihm, S. Klesse, R. Weigt, N. Buchmann, Environmental drivers of tree growth and water-use efficiency of Fagus sylvatica (L.) at Lägeren in the 20th century: the changing roles of climate vs N deposition., in Tree Physiology
SummaryTrees play are a critical role in the carbon cycle - their photosynthetic assimilation is one of the largest terrestrial carbon fluxes and their standing biomass represents the largest carbon pool of the terrestrial biosphere. Understanding how tree physiology and growth respond to long-term environmental change is pivotal to predict the magnitude and direction of the terrestrial carbon sink. iTREE is an interdisciplinary research framework to capitalize on synergies among leading dendro-climatologists, plant physiologists, isotope specialists, and global carbon cycle modellers with the objectives of reducing uncertainties related to tree/forest growth in the context of changing natural environments. Cross-cutting themes in our project are tree rings, stable isotopes, and mechanistic modelling. We will (i) establish a European network of tree-ring based isotope time-series to retrodict inter-annual to long-term tree physiological changes, (ii) conduct laboratory and field experiments to adapt a mechanistic isotope model to derive plant physiological variables from tree-ring isotopes, (iii) implement this model into a dynamic global vegetation model, and perform subsequent model-data validation exercises to refine model representation of plant physiological processes and (iv) attribute long-term variation in tree growth to plant physiological and environmental drivers, and identify how our refined knowledge revises predictions of the coupled carbon-cycle climate system.We will contribute to i) advanced quantifications of long-term variation in tree growth across Central Europe, ii) novel long-term information on key physiological processes that underlie variations in tree growth, and iii) improved carbon cycle models that can be employed to revise predictions of the coupled carbon-cycle climate system. Hence iTREE will result in a seamless understanding of the responses of terrestrial ecosystems to long-term environmental change, and ultimately help reduce uncertainties of the magnitude and direction of the past and future terrestrial carbon sink.