Abstract
This study quantified the effect of soil warming on sap flow density (Qs) of Pinus cembra L. at the treeline in the Central Tyrolean Alps. To enhance soil temperature we installed a transparent roof construction above the forest floor around six trees. Six other trees served as controls in the absence of any manipulation. Roofing enhanced growing season mean soil temperature by 1.6, 1.3 and 1.0 °C at 5, 10 and 20 cm soil depth, respectively, while soil water availability was not affected. Sap flow density (using Granier-type thermal dissipation probes) and environmental parameters were monitored throughout three growing seasons. During the first year of treatment, no warming effect was detected on Qs. However, soil warming caused Qs to increase significantly by 11 and 19% above levels in control trees during the second and third year, respectively. This effect appeared to result from warming-induced root production, a reduction in viscosity and perhaps an increase also in root hydraulic conductivity. Hardly affected were leaf-level net CO2 uptake rate and conductance for water vapour, so that water-use efficiency stayed unchanged as confirmed by needle δ(13)C analysis. We conclude that tree water loss will increase with soil wa...Continue Reading
References
Nov 11, 1999·Plant Physiology·X Wan, J J Zwiazek
Jul 12, 2001·Tree Physiology·X WanS M Landhäusser
Mar 26, 2003·Tree Physiology·Brent E. Ewers, Ram Oren
Dec 1, 1987·Tree Physiology·A Granier
Nov 18, 2005·Nature·T P BarnettD P Lettenmaier
Dec 1, 1975·Plant Physiology·M R Kaufmann
Sep 20, 2006·Journal of Plant Physiology·Celestino RuggieroAlbino Maggio
Sep 28, 2007·Plant, Cell & Environment·Andrew J McElroneRobert B Jackson
Feb 11, 2010·Tree Physiology·Dustin R Bronson, Stith T Gower
Oct 27, 2010·Proceedings of the National Academy of Sciences of the United States of America·Richard J NorbyRoss E McMurtrie
Mar 8, 2011·Annals of Forest Science·Gerhard WieserAndreas Gruber
Jun 1, 2009·Annals of Forest Science·Gerhard WieserAndreas Gruber
Mar 23, 2011·European Journal of Forest Research·A GruberW Oberhuber
Feb 1, 2008·Trees : Structure and Function·Walter OberhuberGerhard Wieser
Citations
Jul 5, 2016·Frontiers in Plant Science·Gerhard WieserThorsten Erhard Edgar Grams
Jul 29, 2016·Frontiers in Plant Science·Xinsheng LiuLin Zhang
Jul 9, 2016·Plant, Cell & Environment·Renée M MarchinWilliam A Hoffmann
May 31, 2017·Plant, Cell & Environment·Charlotte GrossiordNate G McDowell
Oct 28, 2016·Tree Physiology·Jordi Fernàndez-MartínezIsabel Fleck
May 5, 2017·Frontiers in Plant Science·Petra KubischDietrich Hertel
Sep 15, 2016·Physical Review. E·Chu Rainer Kwang-Hua
Dec 6, 2020·Plant, Cell & Environment·Walid SadokKevin P Smith
Jun 17, 2020·The Science of the Total Environment·Xinsheng Liu, Franco Biondi