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Estimating LAI in deciduous forest stands

Eriksson, Helena LU ; Eklundh, Lars LU ; Hall, Karin LU and Lindroth, Anders LU (2005) In Agricultural and Forest Meteorology 129(1-2). p.27-37
Abstract
The leaf area index (LAI), was estimated in deciduous forests of southern Sweden using different estimation techniques. The effective LAI (L-e) was estimated optically by measurements with the gap fraction instrument LAI-2000 and corrections for the aggregation of leaves were achieved by using the TRAC (Tracing Radiation and Architecture of Canopies) instrument. Two methods for correcting the contribution of the woody material were tested. The aim was to find the most reliable estimation technique, and therefore the measurements were compared with LAI estimated from litter fall collection. Optically estimated L-e was correlated with litter trap LAI, indicating that L-e can be used as an estimate of LAI in deciduous forests of the same... (More)
The leaf area index (LAI), was estimated in deciduous forests of southern Sweden using different estimation techniques. The effective LAI (L-e) was estimated optically by measurements with the gap fraction instrument LAI-2000 and corrections for the aggregation of leaves were achieved by using the TRAC (Tracing Radiation and Architecture of Canopies) instrument. Two methods for correcting the contribution of the woody material were tested. The aim was to find the most reliable estimation technique, and therefore the measurements were compared with LAI estimated from litter fall collection. Optically estimated L-e was correlated with litter trap LAI, indicating that L-e can be used as an estimate of LAI in deciduous forests of the same characteristics as tested here. The litter fall collection technique involves knowledge about the specific leaf area (SLA). Since, we found that SLA varied between leaves picked from top positioned branches and leaves picked from low positioned branches as well as between different species, we suggest some caution when interpreting the values. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
litter fall collection, TRAC, specific leaf area (SLA), forest, deciduous, forest ecosystem, leaf area index (LAI), leaf aggregation
in
Agricultural and Forest Meteorology
volume
129
issue
1-2
pages
27 - 37
publisher
Elsevier
external identifiers
  • wos:000228052700003
  • scopus:14744268311
ISSN
1873-2240
DOI
10.1016/j.agrformet.2004.12.003
language
English
LU publication?
yes
id
d09508e6-1b58-4b05-821d-e4090200944f (old id 247267)
date added to LUP
2007-08-10 12:00:06
date last changed
2017-10-29 04:26:20
@article{d09508e6-1b58-4b05-821d-e4090200944f,
  abstract     = {The leaf area index (LAI), was estimated in deciduous forests of southern Sweden using different estimation techniques. The effective LAI (L-e) was estimated optically by measurements with the gap fraction instrument LAI-2000 and corrections for the aggregation of leaves were achieved by using the TRAC (Tracing Radiation and Architecture of Canopies) instrument. Two methods for correcting the contribution of the woody material were tested. The aim was to find the most reliable estimation technique, and therefore the measurements were compared with LAI estimated from litter fall collection. Optically estimated L-e was correlated with litter trap LAI, indicating that L-e can be used as an estimate of LAI in deciduous forests of the same characteristics as tested here. The litter fall collection technique involves knowledge about the specific leaf area (SLA). Since, we found that SLA varied between leaves picked from top positioned branches and leaves picked from low positioned branches as well as between different species, we suggest some caution when interpreting the values.},
  author       = {Eriksson, Helena and Eklundh, Lars and Hall, Karin and Lindroth, Anders},
  issn         = {1873-2240},
  keyword      = {litter fall collection,TRAC,specific leaf area (SLA),forest,deciduous,forest ecosystem,leaf area index (LAI),leaf aggregation},
  language     = {eng},
  number       = {1-2},
  pages        = {27--37},
  publisher    = {Elsevier},
  series       = {Agricultural and Forest Meteorology},
  title        = {Estimating LAI in deciduous forest stands},
  url          = {http://dx.doi.org/10.1016/j.agrformet.2004.12.003},
  volume       = {129},
  year         = {2005},
}