EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Estimation of tree canopy leaf area index by gap fraction analysis


Forest Ecology & Management 61(1-2): 91-108
Estimation of tree canopy leaf area index by gap fraction analysis
We estimated leaf area index (LAI) in a needle-leaved forest and a broad-leaved orchard using four instruments which measure fractional light penetration through the canopy. Gap fraction data were analyzed by a one-dimensional inversion model or by using the Beer-Lambert Law. Instrument and analytical technique both had a strong influence on calculated LAI. There was no consistent pattern of LAI results among instruments so no simple cross-calibration can be offered. Three of the four instruments accurately estimated orchard LAI when used with one or the other analytical technique. In addition to performance, practical considerations including cost, sampling, and data analysis were also compared among the instruments. Because the instruments do not provide consistently accurate LAI estimates, LAI should be independently corroborated before use in any particular situation. These instruments may be most useful for relative LAI comparisons in a specific canopy type when a single combination of instrument and analytical technique is employed.

Accession: 002373505

DOI: 10.1016/0378-1127(93)90192-P

Download PDF Full Text: Estimation of tree canopy leaf area index by gap fraction analysis



Related references

Calibration and validation of hyperspectral indices for the estimation of broadleaved forest leaf chlorophyll content, leaf mass per area, leaf area index and leaf canopy biomass. Remote Sensing Of Environment2: 10, 3846-3864, 2008

Inversion of vegetation canopy reflectance models for estimating agronomic variables 5. estimation of leaf area index and average leaf angle using measured canopy reflectances. Remote Sensing of Environment 16(1): 69-86, 1984

Effects of leaf aggregation in a broad-leaf canopy on estimates of leaf area index by the gap-fraction method. Forest Ecology & Management 97(3): 277-282, Oct 9, 1997

A vegetation canopy radiative transfer model and its use to estimate canopy leaf area index and absorbed fraction of photosynthetically active radiation. 1997

Estimation of leaf area index and plant area index of a submerged macrophyte canopy using digital photography. Plos One 7(12): E51034-E51034, 2013

Inversion of vegetative canopy reflectance models for estimating agronomic variables. V. Estimation of leaf area index and average leaf angle using measured canopy reflectance. Remote Sensing of Environment 16(1): 69-85, 1984

Estimation of leaf area index by normalized composite vegetation index fusing the spectral feature of canopy water content. Guang Pu Xue Yu Guang Pu Fen Xi 31(2): 478-482, 2014

Estimation of leaf area index by plant canopy analyzer in rice. Korean Journal of Crop Science 49(6): 463-467, 2004

A method for estimation of vertical distribution of leaf area index in wheat canopy. Biuletyn Instytutu Hodowli i Aklimatyzacji Roslin (168): 3-12, 1988

Estimation of leaf area index in crop canopies using plant canopy analyzer. Japanese Journal of Crop Science 64(2): 333-335, 1995