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Spatial variability of xylem sap flow in mature beech (Fagus sylvatica) and its diurnal dynamics in relation to microclimate

An Saveyn UGent, Kathy Steppe UGent and Raoul Lemeur UGent (2008) BOTANY-BOTANIQUE. 86(12). p.1440-1448
abstract
The spatial and diurnal variability of sap flow in a mature beech tree (Fagus sylvatica L.) was investigated on days with different climatic conditions (sunny, cloudy, rainy), during the summer. Sap flux density (nu) was measured with six heat field deformation probes placed around the stem circumference. Each probe measured nu at six sapwood depths. Daily nu exhibited clear radial variation, and the shape of the radial profile of nu differed substantially among circumferential positions. At some positions, daily nu decreased monotonically towards the stem centre, whereas at others it showed an almost monotonic increase. Hence, the conducting sapwood area of the beech was highly asymmetrical. At all positions., conducting sapwood reached beyond the deepest sampled sapwood depth, precluding correct estimations of total sap flow. The radial profile of nu also differed among measuring days. A general trend was that the inner sapwood contributed relatively more to total sap flow under better weather conditions. Besides variations among days, the shape of the radial profile of nu also showed within-day variations. The contribution of the inner sapwood to total sap flow increased in the afternoon, with increasing vapour pressure deficit and photosynthetic active radiation. Because of large circumferential and temporal variability, no general function for the radial profile of nu could be developed.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
journal title
BOTANY-BOTANIQUE
Botany
volume
86
issue
12
pages
1440 - 1448
Web of Science type
Article
Web of Science id
000262718600008
JCR category
PLANT SCIENCES
JCR impact factor
99.999 (2008)
JCR rank
1/155 (2008)
JCR quartile
4 (2008)
ISSN
1916-2790
DOI
10.1139/B08-112
language
English
UGent publication?
yes
classification
A1
id
692181
handle
http://hdl.handle.net/1854/LU-692181
date created
2009-06-12 09:18:03
date last changed
2009-06-12 09:25:22
@article{692181,
  abstract     = {The spatial and diurnal variability of sap flow in a mature beech tree (Fagus sylvatica L.) was investigated on days with different climatic conditions (sunny, cloudy, rainy), during the summer. Sap flux density (nu) was measured with six heat field deformation probes placed around the stem circumference. Each probe measured nu at six sapwood depths. Daily nu exhibited clear radial variation, and the shape of the radial profile of nu differed substantially among circumferential positions. At some positions, daily nu decreased monotonically towards the stem centre, whereas at others it showed an almost monotonic increase. Hence, the conducting sapwood area of the beech was highly asymmetrical. At all positions., conducting sapwood reached beyond the deepest sampled sapwood depth, precluding correct estimations of total sap flow. The radial profile of nu also differed among measuring days. A general trend was that the inner sapwood contributed relatively more to total sap flow under better weather conditions. Besides variations among days, the shape of the radial profile of nu also showed within-day variations. The contribution of the inner sapwood to total sap flow increased in the afternoon, with increasing vapour pressure deficit and photosynthetic active radiation. Because of large circumferential and temporal variability, no general function for the radial profile of nu could be developed.},
  author       = {Saveyn, An and Steppe, Kathy and Lemeur, Raoul},
  issn         = {1916-2790},
  journal      = {BOTANY-BOTANIQUE},
  language     = {eng},
  number       = {12},
  pages        = {1440--1448},
  title        = {Spatial variability of xylem sap flow in mature beech (Fagus sylvatica) and its diurnal dynamics in relation to microclimate},
  url          = {http://dx.doi.org/10.1139/B08-112},
  volume       = {86},
  year         = {2008},
}

Chicago
Saveyn, An, Kathy Steppe, and Raoul Lemeur. 2008. “Spatial Variability of Xylem Sap Flow in Mature Beech (Fagus Sylvatica) and Its Diurnal Dynamics in Relation to Microclimate.” Botany-botanique 86 (12): 1440–1448.
APA
Saveyn, A., Steppe, K., & Lemeur, R. (2008). Spatial variability of xylem sap flow in mature beech (Fagus sylvatica) and its diurnal dynamics in relation to microclimate. BOTANY-BOTANIQUE, 86(12), 1440–1448.
Vancouver
1.
Saveyn A, Steppe K, Lemeur R. Spatial variability of xylem sap flow in mature beech (Fagus sylvatica) and its diurnal dynamics in relation to microclimate. BOTANY-BOTANIQUE. 2008;86(12):1440–8.
MLA
Saveyn, An, Kathy Steppe, and Raoul Lemeur. “Spatial Variability of Xylem Sap Flow in Mature Beech (Fagus Sylvatica) and Its Diurnal Dynamics in Relation to Microclimate.” BOTANY-BOTANIQUE 86.12 (2008): 1440–1448. Print.