cambial growth model; climate change impacts; dendroclimatology; forest productivity; global warming; intra-annual growth variatins; Swiss Alps; temperature gradient; xylogenesis; cambial growth; intra-annual growth variations
Rossi Sergio, Anfodillo Tommaso, Čufar Katarina, Cuny Henri E., Deslauriers Annie, Fonti Patrick, Frank David, Gričar Jožica, Gruber Andreas, Huang Jian-Guo, Jyske Tuula, Kašpar Jakub, King Gregory, Krause Cornelia, Liang Eryuan, Mäkinen Harri, Morin Hubert, Nöjd Pekka, Oberhuber Walter, Prislan Peter, Rathgeber Cyrille B.K., Saracino Antonio, Swidrak Irene, Treml Václav (2016), Pattern of xylem phenology in conifers of cold ecosystems at the Northern Hemisphere, in Global Change Biology
, 22(11), 3804-3813.
Fonti Patrick, Babushkina Elena A (2016), Tracheid anatomical responses to climate in a forest-steppe in Southern Siberia, in Dendrochronologia
, 39, 32-41.
Cuny Henri E., Rathgeber Cyrille B. K., Frank David, Fonti Patrick, Mäkinen Harri, Prislan Peter, Rossi Sergio, del Castillo Edurne Martinez, Campelo Filipe, Vavrčík Hanuš, Camarero Jesus Julio, Bryukhanova Marina V., Jyske Tuula, Gričar Jožica, Gryc Vladimír, De Luis Martin, Vieira Joana, Čufar Katarina, Kirdyanov Alexander V., Oberhuber Walter, Treml Vaclav, Huang Jian-Guo, Li Xiaoxia, Swidrak Irene, et al. (2015), Woody biomass production lags stem-girth increase by over one month in coniferous forests, in Nature Plants
, 1(11), 15160-15160.
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.
King Gregory M., Gugerli Felix, Fonti Patrick, Frank David C. (2013), Tree growth response along an elevational gradient: climate or genetics?, in Oecologia
, 173(4), 1587-1600.
Rossi Sergio, Anfodillo Tommaso, Čufar Katarina, Cuny Henri E., Deslauriers Annie, Fonti Patrick, Frank David, Gričar Jožica, Gruber Andreas, King Gregory M., Krause Cornelia, Morin Hubert, Oberhuber Walter, Prislan Peter, Rathgeber Cyrille B. K. (2013), A meta-analysis of cambium phenology and growth: linear and non-linear patterns in conifers of the northern hemisphere, in Annals of Botany
, 112(9), 1911-1920.
Simard S., Giovannelli A., Treydte K., Traversi M. L., King G. M., Frank D., Fonti P. (2013), Intra-annual dynamics of non-structural carbohydrates in the cambium of mature conifer trees reflects radial growth demands, in Tree Physiology
, 33(9), 913-923.
Bryukhanova Marina, Fonti Patrick (2013), Xylem plasticity allows rapid hydraulic adjustment to annual climatic variability, in Trees
, 27(3), 485-496.
Fonti P., Heller O., Cherubini P., Rigling A., Arend M. (2013), Wood anatomical responses of oak saplings exposed to air warming and soil droughtWood anatomical responses to warming and drought, in Plant Biology
, 15, 210-219.
Fonti Patrick, Eilmann Britta, García-González Ignacio, von Arx Georg (2009), Expeditious building of ring-porous earlywood vessel chronologies without loosing signal information, in Trees
, 23(3), 665-671.
Bryukhanova M, Fonti P, Exploring the link between xylem cell anatomy and inter-annual climatic variability., in Trees
King G., Fonti P., Nievergelt D., Büntgen U., Frank D., Climatic drivers of hourly to yearly tree radius variations along a 6° C natural warming gradient, in Agricultural and Forest Meteorology
, 168, 36-46.
Esper J., Frank D.C., Timonen M., Zorita E., Wilson R.J.S., Luterbacher J., Holzkämper S., Fischer N., Wagner S., Nievergelt D., Orbital forcing of tree-ring data, in Nature Climate Change
, DOI: 10.1038/NCLIMATE1589, 1-5.
Moser L, Fonti P, Buntgen U, Esper J, Luterbacher J, Franzen J, Frank D, Timing and duration of European larch growing season along altitudinal gradients in the Swiss Alps, in TREE PHYSIOLOGY
, 30(2), 225-233.
Anchukaitis K.J., D'Arrigo R.D., Andreu-Hayles L., Frank D., Verstege A., Curtis A., Buckley B.M., Jacoby G.C., Cook E.R., Tree-ring reconstructed summer temperatures from northwestern North America during the last nine centuries, in Journal of Climate
Andreu-Hayles L., D’Arrigo R., Anchukaitis K.J., Beck P.S.A., Frank D., Goetz S., Varying boreal forest response to Arctic environmental change at the Firth River, Alaska, in Environmental Research Letters
, 6(4), 045503-045503.
While considerable uncertainties are associated with the understanding of the earth’s climate system, General Circulation Models (GCMs) commonly predict future widespread temperature increases into the next century (Stott et al. 2006), thereby continuing the warming known from instrumental observations and proxy records (Frank et al. 2007a). Impacts of the recent warming have been recognized for both abiotic (e.g., permafrost melting) and biotic (e.g., spring greening) systems. Forests represent an important biosphere component, as they contain about 90% of the living terrestrial biomass, significantly regulate the land-atmosphere flux of water vapor, and are of considerable economic importance to society. However, even without consideration of feedbacks, warming impacts on ecosystem functioning in general and forests in particular, are difficult to predict due to their great complexity.In the proposed project, we aim to study the influence of a warming climate on tree-growth. To reach this objective, we have selected a study location (Lötschental Valley in the Central Swiss Alps) that offers a 1000 meter elevational gradient within a confined geographical region. The Lötschental offers both north and south facing slopes that are forested from the valley bottom (~1300 m asl) to treeline (~2300 m asl) with inter-mixed evergreen spruce (Picea abies) and deciduous larch (Larix decidua) trees. The temperature change along this transect (~ 4°C) roughly corresponds with that projected for the year 2100 based on GCMs driven by reasonable emission scenarios (IPCC 2007). As effects from warming may involve non-linear and subtle shifts in growing season length and cellular activity, significant emphasis will be placed on temporally highly-resolved (intra-seasonal) field measurements including: i) weekly collection of microcore samples, ii) hourly dendrometer measurements, iii) weekly phenological observations, andiv) in-situ meteorological measurements.Details about the timing and duration of tracheid growth for different growing seasons (2007 - 2010) and as a function of elevation, will allow determination of climatic influences upon growing season length and growth rates. These high-resolution data will be extended by increment cores to retrospectively assess radial growth and density (Frank and Esper 2005a), and wood anatomical characteristics (Fonti et al. 2008c) over the past couple hundred years. As relative growth influences may change over time (e.g., as a function of mean temperature) and are additionally intercorrelated, we propose to use a cambial growth model as an objective framework for investigating climatic forcing (Anchukaitis et al. 2006). In a two-way process, this model will be parameterized/verified by the intra-seasonal measurements, and will then be used to hindcast the growth variations over the past 100+ years. Regionally available long instrumental temperature, precipitation, and radiation series (Auer et al. 2007, Frank et al. 2008b) will be employed for both empirical and modeling assessments. Cambial modeling activities will allow discrimination of the multiple climatic influences that simultaneously drive tree-growth, and in turn will be improved by the intra-annual measurements for improved predictions of future growth with GCM ensembles. The proposed project will, for the first time, integrate intra-annual observations, long-term measurements, and modeling runs of tree growth along an elevational transect, thereby providing new data and insights of species specific responses to temperature change.