PMID- 27587487
OWN - NLM
STAT- MEDLINE
DCOM- 20170830
LR  - 20171218
IS  - 1758-4469 (Electronic)
IS  - 0829-318X (Linking)
VI  - 36
IP  - 12
DP  - 2016 Dec
TI  - An empirical study of the wound effect on sap flux density measured with thermal 
      dissipation probes.
PG  - 1471-1484
AB  - The insertion of thermal dissipation (TD) sensors on tree stems for sap flux 
      density (SFD) measurements can lead to SFD underestimations due to a wound 
      formation close to the drill hole. However, the wound effect has not been 
      assessed experimentally for this method yet. Here, we propose an empirical 
      approach to investigate the effect of the wound healing on measured sap flux with 
      TD probes. The approach was performed for both, diffuse-porous (Fagus sylvatica 
      (Linnaeus)) and ring-porous (Quercus petraea (Lieblein)) species. Thermal 
      dissipation probes were installed on different dates along the growing season to 
      document the effects of the dynamic wound formation. The trees were cut in autumn 
      and additional sensors were installed in the cut stems, therefore, without 
      potential effects of wound development. A range of water pressures was applied to 
      the stem segments and SFDs were simultaneously measured by TD sensors as well as 
      gravimetrically in the laboratory. The formation of wounds around sensors 
      installed in living tree stems led to underestimation of SFD by 21.4 +/- 3 and 
      47.5 +/- 3.8% in beech and oak, respectively. The differences between SFD 
      underestimations of diffuse-porous beech and ring-porous oak were, however, not 
      statistically significant. Sensors with 5-, 11- and 22-week-old wounds also 
      showed no significant differences, which implies that the influence of wound 
      formation on SFD estimates was completed within the first few weeks after 
      perforation. These results were confirmed by time courses of SFD measurements in 
      the field. Field SFD values decreased immediately after sensor installation and 
      reached stable values after ~2 weeks with similar underestimations to the ones 
      observed in the laboratory. We therefore propose a feasible approach to correct 
      directly field observations of SFD for potential underestimations due to the 
      wound effect.
CI  - (c) The Author 2016. Published by Oxford University Press. All rights reserved. For 
      Permissions, please e-mail: journals.permissions@oup.com.
FAU - Wiedemann, Andreas
AU  - Wiedemann A
AD  - Department Computational Hydrosystems, UFZ-Helmholtz Centre for Environmental 
      Research, Permoserstrasse 15, 04318 Leipzig, Germany.
AD  - Institute for Geological Sciences, Friedrich-Schiller-University Jena, Burgweg 
      11, 07749 Jena, Germany.
FAU - Maranon-Jimenez, Sara
AU  - Maranon-Jimenez S
AD  - Department Computational Hydrosystems, UFZ-Helmholtz Centre for Environmental 
      Research, Permoserstrasse 15, 04318 Leipzig, Germany smaranon@ugr.es.
AD  - Institute for Geological Sciences, Friedrich-Schiller-University Jena, Burgweg 
      11, 07749 Jena, Germany.
AD  - Department of Applied Physics, University of Granada, Av. Fuentenueva s/n, 
      E-18071 Granada, Spain.
FAU - Rebmann, Corinna
AU  - Rebmann C
AD  - Department Computational Hydrosystems, UFZ-Helmholtz Centre for Environmental 
      Research, Permoserstrasse 15, 04318 Leipzig, Germany.
FAU - Herbst, Mathias
AU  - Herbst M
AD  - Thunen Institute of Climate Smart Agriculture, Bundesallee 50, 38116 
      Braunschweig, Germany.
FAU - Cuntz, Matthias
AU  - Cuntz M
AD  - Department Computational Hydrosystems, UFZ-Helmholtz Centre for Environmental 
      Research, Permoserstrasse 15, 04318 Leipzig, Germany.
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20160901
PL  - Canada
TA  - Tree Physiol
JT  - Tree physiology
JID - 100955338
SB  - IM
MH  - *Biosensing Techniques
MH  - *Fagus
MH  - Forests
MH  - Hot Temperature
MH  - *Plant Diseases
MH  - *Plant Transpiration
MH  - *Quercus
MH  - *Trees
OTO - NOTNLM
OT  - European beech
OT  - Fagus sylvatica
OT  - Quercus petraea
OT  - heat transfer
OT  - sap flow
OT  - sap flow underestimations
OT  - sap velocity
OT  - sessile oak
OT  - wound healing reaction
EDAT- 2016/09/03 06:00
MHDA- 2017/08/31 06:00
CRDT- 2016/09/03 06:00
PHST- 2016/02/04 00:00 [received]
PHST- 2016/06/22 00:00 [revised]
PHST- 2016/07/02 00:00 [accepted]
PHST- 2016/09/03 06:00 [pubmed]
PHST- 2017/08/31 06:00 [medline]
PHST- 2016/09/03 06:00 [entrez]
AID - tpw071 [pii]
AID - 10.1093/treephys/tpw071 [doi]
PST - ppublish
SO  - Tree Physiol. 2016 Dec;36(12):1471-1484. doi: 10.1093/treephys/tpw071. Epub 2016 
      Sep 1.