
Lars Eklundh
Professor

Estimating LAI in deciduous forest stands
Author
Summary, in English
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.
Department/s
- Dept of Physical Geography and Ecosystem Science
Publishing year
2005
Language
English
Pages
27-37
Publication/Series
Agricultural and Forest Meteorology
Volume
129
Issue
1-2
Links
Document type
Journal article
Publisher
Elsevier
Topic
- Physical Geography
Keywords
- litter fall collection
- TRAC
- specific leaf area (SLA)
- forest
- deciduous
- forest ecosystem
- leaf area index (LAI)
- leaf aggregation
Status
Published
ISBN/ISSN/Other
- ISSN: 1873-2240