Sylvie Mussche, Roeland Samson, Lieven Nachtergale, An De Schrijver, Raoul Lemeur, Noël Lust. (2001). A comparison of optical and direct methods for monitoring the seasonal dynamics of leaf area index in deciduous forests. Silva Fennica vol. 35 no. 4 article id 575. https://doi.org/10.14214/sf.575

Keywords: Leaf Area Index; mixed deciduous forest; LAI-2000 plant canopy analyser; hemispherical photography; litter trap

Abstract | View details | Full text in PDF | Author Info

During the 1996 growing season the seasonal dynamics of the Leaf Area Index (LAI) were determined by 3 different methods in two forest types: a mixed oak (Quercus robur L.) – beech (Fagus sylvatica L.) stand and an ash dominated (Fraxinus excelsior L.) stand. The results obtained from the two indirect methods, i.e. hemispherical photography and LAI-2000 Plant Canopy Analyser (Li-COR), were compared with the results of the direct measurement of litter fall collected in litter trap systems. In this study the direct method is considered to be the reference, giving the most accurate LAI-values. Both the hemispherical photography and the LAI-2000 PCA introduced an underestimation of LAI when the actual canopy leaf distribution in the crown layer deviates from a random distribution of leaf area in space as is found in the mixed oak/beech stand. However, when the condition of random leaf distribution is nearly fulfilled (ash stand), the LAI-2000 PCA gave LAI-values which were close to the results obtained from the direct method. Regression curves with R2 > 0.93 could be calculated for both indirect methods.

Mussche, Laboratory of Forestry, Ghent University, Geraardsbergse Steenweg 267, B-9090 Melle, Belgium E-mail: sm@nn.be
Samson, Laboratory of Plant Ecology, Ghent University, Coupure Links 653, B-9000 Gent, Belgium E-mail: rs@nn.be
Nachtergale, Laboratory of Forestry, Ghent University, Geraardsbergse Steenweg 267, B-9090 Melle, Belgium E-mail: ln@nn.be
De Schrijver, Laboratory of Forestry, Ghent University, Geraardsbergse Steenweg 267, B-9090 Melle, Belgium E-mail: An.Deschrijver@rug.ac.be
Lemeur, Laboratory of Plant Ecology, Ghent University, Coupure Links 653, B-9000 Gent, Belgium E-mail: rl@nn.be
Lust, Laboratory of Forestry, Ghent University, Geraardsbergse Steenweg 267, B-9090 Melle, Belgium E-mail: nl@nn.be

Click this link to register to Silva Fennica.

If you are a registered user, log in to save your selected articles for later access.

Contents alert

Your selected articles
Send to email

Bäcklund S., Jönsson M. T. et al. (2015) Composition of functional groups of ground veget.. Silva Fennica vol. 49 no. 2 article id 1321 (remove) | Edit comment

Lamedica S., Lingua E. et al. (2011) Spatial structure in four Norway spruce stands w.. Silva Fennica vol. 45 no. 5 article id 75 (remove) | Edit comment

Vasiliauskas R., Stenlid J. (1998) Spread of Stereum sanguinolentum vegetative comp.. Silva Fennica vol. 32 no. 4 article id 672 (remove) | Edit comment

Kaunisto S., Sarjala T. (2003) Foliar potassium concentrations of bilberry, bog.. Silva Fennica vol. 37 no. 3 article id 492 (remove) | Edit comment

Dragotescu I., Kneeshaw D. D. (2012) A comparison of residual forest following fires .. Silva Fennica vol. 46 no. 3 article id 47 (remove) | Edit comment

Nuutinen T., Kellomäki S. (2001) A comparison of three modelling approaches for l.. Silva Fennica vol. 35 no. 3 article id 586 (remove) | Edit comment

Salminen H., Jalkanen R. (2005) Modelling the effect of temperature on height in.. Silva Fennica vol. 39 no. 4 article id 362 (remove) | Edit comment

Schweier J., Becker G. (2012) Harvesting of short rotation coppice – harvestin.. Silva Fennica vol. 46 no. 2 article id 61 (remove) | Edit comment

Matulevičiūtė D., Motiejunaite J. et al. (2018) Decline of a protected coastal pine forest under.. Silva Fennica vol. 52 no. 2 article id 7699 (remove) | Edit comment

Keltikangas V., (1959) Finnish feather-moss types and their position in.. Acta Forestalia Fennica vol. 69 no. 2 article id 7490 (remove) | Edit comment

Yirdaw E., Tigabu M. et al. (2017) Rehabilitation of degraded dryland ecosystems – .. Silva Fennica vol. 51 no. 1B article id 1673 (remove) | Edit comment

Lähde E., (1971) Anaerobic conditions in various virgin peat soil.. Silva Fennica vol. 5 no. 1 article id 4836 (remove) | Edit comment

Seppänen O., (1939) Car transportation of roundwood and its signific.. Silva Fennica vol. no. 52 article id 4555 (remove) | Edit comment

Seppälä K., (1972) Ditch spacing as a regulator of post-drainage st.. Acta Forestalia Fennica vol. 0 no. 125 article id 7559 (remove) | Edit comment

Heikkilä T., (1927) On examining the cross-sectional area of a stem Acta Forestalia Fennica vol. 32 no. 3 article id 7208 (remove) | Edit comment

Hytönen J., (1995) Effect of repeated fertilizer application on the.. Silva Fennica vol. 29 no. 2 article id 5550 (remove) | Edit comment

Leikola M., (1976) Measuring environmental factors in a forest ecos.. Silva Fennica vol. 10 no. 2 article id 4943 (remove) | Edit comment

Pulkkinen P., (1993) Frost hardiness development and lignification of.. Silva Fennica vol. 27 no. 1 article id 5497 (remove) | Edit comment

Follow @SilvaFennica