a. ISI-Papers

Etzold S., Zweifel R., Ruehr N.K., Eugster W., and Buchmann N. 2013. Long-term stem CO2 concentration measurements in Norway spruce in relation to biotic and abiotic factors. New Phytologist. doi: 10.1111/nph.12115. (PDF 1MB)

Rigling A., Bigler C., Eilmann B., Feldmeyer-Christe E., Gimmi U., Ginzler C., Graf U., Mayer P., Vacchiano G., Weber P., Wohlgemuth T., Zweifel R., and Dobbertin M. 2013. Driving factors of a vegetation shift from Scots pine to pubescent oak in dry Alpine forests. Global Change Biology. 19, 229–240, doi: 10.1111/gcb.12038. (PDF 390KB)

Sterck F.J., Martinez-Vilalta J., Mencuccini M., Cochard H., Gerrits P., Zweifel R., Herrero A., Korhonen J.F.J., Llorens P., Nikinmaa E., Nole A., Poyatos R., Ripullone  F., and Sass-Klaassen U. 2012. Understanding trait interactions and their impacts on growth in Scots pine branches across Europe. Functional Ecology. 26:541-549. (PDF 460KB)

Slot, M., Janse-ten Klooster S.H., Sterck F.J., Sass-Klaassen U., and Zweifel R. 2012. A lifetime perspective of biomass allocation in Quercus pubescens trees in a dry, alpine valley. Trees - Structure and Function. DOI 10.1007/s00468-012-0717-4:1-8. (PDF 805KB)

Zweifel R., Bangerter S., Rigling A., Sterck F.J. 2012. Pine and mistletoes: how to live with a leak in the water flow and storage system? Journal of Experimental Botany, doi:10.1093/jxb/err432. (link to JXB), (PDF 1MB)

Etzold S., Ruehr N.K., Zweifel R., Dobbertin M., Zingg A., Pluess P., Häsler R., Eugster W., Buchmann N. 2011. The carbon balance of two contrasting mountain forest ecosystems in Switzerland: Similar annual trends, but seasonal differences. Ecosystems, 14 (8): 1289-1309. (PDF 740KB)

Eilmann B., Zweifel R., Buchmann N., Graf Pannatier E., and Rigling A. 2011. Drought alters timing, quantity, and quality of wood formation in Scots pine. Journal of Experimental Botany, doi:10.1093/jxb/erq443. (PDF 740KB)

Zweifel R., Eugster W., Etzold S., Dobbertin M., Buchmann N. and Häsler R. 2010. Link between continuous stem radius changes and net ecosystem productivity of a subalpine Norway spruce forest in the Swiss Alps. New Phytologist, 187: 819-830. (PDF 510KB)

Martinez-Vilalta J., Cochard H., Mencuccini M., Sterck F.J., Herrero A., Korhonen J.F.J., Llorens P., Nikinmaa E., Poyatos R., Ripullone F., Sass-Klaassen U., Zweifel R. 2009. Hydraulic adjustment of Scots pine across Europe. New Phytologist 184: 353–364. (PDF 1MB)

Steppe K, Zeugin F, and Zweifel R. 2009. Low-dB ultrasonic acoustic emissions are temperature-induced and probably have no biotic origin. New Phytologist 183: 928-931. (PDF 1600KB)

Eilmann B., Zweifel R., Buchmann N., Fonti P., and Rigling, A. 2009. Drought-induced adaptation of the xylem in Scots pine and pubescent oak. Tree Physiology, 29(8), 1011-1020. (PDF 650KB)

Zweifel R., Rigling, A. & Dobbertin, M. 2009. Species-specific stomatal response of trees to drought - a link to vegetation dynamics?. Journal of Vegetation Science, 20, 442-454. (PDF 776KB)

Zweifel R. and Zeugin F. 2008. Ultrasonic acoustic emissions in drought-stressed trees – more than signals from cavitation?. New Phytologist, 179, 1070-1079. (PDF 352KB)

Sterck FJ, Zweifel R., Sass-Klaassen U, and Chowdhury Q. 2008. Persisting soil drought reduces leaf specific conductivity in Scots pine (Pinus sylvestris) and pubescent oak (Quercus pubescent). Tree Physiology, 28, 529-536. (PDF 145KB)

Zweifel R., Steppe K. and Sterck FJ. 2007. Stomatal regulation by microclimate and tree water relations: interpreting ecophysiological field data with a hydraulic plant model. Journal of Experimental Botany, 58, 2113-2131. (PDF 1437KB)

Tinner, W., S. Hofstetter, F. Zeugin, M. Conedera, T. Wohlgemuth, L. Zimmermann and R. Zweifel. 2006. Long-distance transport of macroscopic charcoal by an intensive crown fire in the Swiss Alps – implications for fire history reconstruction. Holocene 16 (2): 287-292. (PDF 444KB)

Zweifel, R., L. Zimmermann, F. Zeugin and D.M. Newbery. 2006. Intra-annual radial growth and water relations of trees – implications towards a growth mechanism. Journal of Experimental Botany 57(6):1445-1459. (PDF 796KB)

Zweifel, R., L. Zimmermann and D.M. Newbery. 2005. Modeling tree water deficit from microclimate: an approach to quantifying drought stress. Tree Physiology 25:147-156. (PDF 791KB )

Zweifel, R., J. P. Böhm and R. Häsler. 2002. Midday stomatal closure in Norway spruce—reactions in the upper and lower crown. Tree Physiology 22:1125–1136. (PDF 2075KB)

Zweifel, R., H. Item, R. Häsler. 2001. Link between diurnal stem radius changes and tree water relations. Tree Physiology 21:869-877. (PDF 929KB)

Zweifel, R., R. Häsler. 2001. Dynamics of water storage in mature subalpine Picea abies: temporal and spatial patterns of change in stem radius. Tree Physiology 21:561-569. (PDF 1006KB)

Zweifel, R., H. Item, R. Häsler. 2000. Stem radius changes and their relation to sto-red water in stems of young Norway spruce trees. Trees 15: 50-57. (PDF 2512KB)

Zweifel, R., R. Häsler. 2000. Frost-induced reversible shrinkage of bark of mature, subalpine conifers. Agric. For. Meteorol. 102: 213-222. (PDF 1518KB)

Herzog, K.M., R. Thum, R. Zweifel, R. Häsler. 1997. Heat balance measurements: to quantify sap flow in thin stems only. Agric. For. Meteorol. 83: 75-94. (PDF 1300KB)

b. Reviewed (not ISI)

Zweifel, R. 1999. The rhythm of trees – water storage dynamics in subalpine Nor-way spruce. Diss. ETH Zürich No. 13391, 112 p. (Link ETHZ)

c. Not reviewed

Körner Ch., Buchmann N., Bugmann H., Duelli P, Hiltbrunner E, Müller-Ferch G, Müller JP, Wildi O, Zweifel R. 2007. Landökosysteme. In:  Klimaänderung und die Schweiz 2050. OcCC / ProClim, Schwarztorstrasse 9,  3007 Bern. (PDF 4340 KB).

Zweifel, R., Zimmermann L, Tinner W, Haldimann P, Zeugin F, Bangerter S, Hofstet-ter S, Conedera M, Wohlgemuth T, Gallé A, Feller U and Newbery DM. 2006. Salgesch, Jeizinen, ihre Wälder und der globale Klimawandel. Nationaler For-schungsschwerpunkt Klima (NFS Klima), Universität Bern, Bern, p. 23. (PDF 2193KB)

Rigling, A.; Dobbertin, M.; Bürgi, M.; Feldmeier-Christe, E.; Gimmi, U.; Ginzler, C.; Graf, U.; Mayer, P.; Zweifel, R.; Wohlgemuth, T.,  2006:  Baumartenwechsel in den Walliser Waldföhrenwäldern.  Wald und Klimawandel. Forum für Wissen  2006:  23-33. (PDF 696KB)

Zweifel, R., K.M. Herzog. 2001. Bäume – Vorbilder für eine nachhaltige Industrie. Kompetenz-Zentrum Holz. EMPA Dübendorf und St.Gallen, ETH Zürich, WSL Birmensdorf. 9. Jahrgang, Heft 1: 16-21. (PDF 2643KB)

d. Others

Artikel über Ultraschall-Signale in Bäumen. NZZ am Sonntag (A. Bieri). 2008. Aufgehende Sonne bringt Bäume zum Sprechen. (PDF 2900KB)

Interview mit der NZZ. 2008. Den Waldföhren wird es im Wallis zu heiss. (Link NZZ)

Zweifel, R., L. Zimmermann. 2002. Reportage „Baumsensoren“ im Schweizer Fernsehen SFDRS 1 in Menschen, Technik, Wissenschaft.