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Journal of Applied Sciences
  Year: 2010 | Volume: 10 | Issue: 13 | Page No.: 1326-1330
DOI: 10.3923/jas.2010.1326.1330
 
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Estimation of Stand Canopy Cover by Different Methods on Crown Projections: Sample of Lebanon Cedar Stands of the Yavsan Mountain, Kahramanmaras, Turkey

M.D. Avsar and V. Ayyildiz

Abstract:
In this study, the possibilities of estimation of stand canopy cover were investigated by ocular estimation method and graphic methods on computer on the crown projection diagrams with scale. Each of six sample plots selected from Lebanon cedar (Cedrus libani A. Rich.) stands of the Yavsan Mountain, Kahramanmaras, southern Turkey, was divided into five parcels of 10x10 m and crown projections of the trees located in these parcels were drawn. Percent canopy covers were tried to be determined by ocular estimation of three different persons (A, B, C) and three different graphic methods (digital square grid, polygon, binary image) on the drawn crown projections. The general mean percent canopy cover (N = 30) was the lowest in the binary image method (0.61), followed by B’s ocular estimation (0.62), polygon (0.64), digital square grid (0.65), A’s and C’s ocular estimation (0.66) methods. The results of one way ANOVA showed that there was no statistically significant difference (p>0.05) in terms of the mean percent canopy cover among the methods for all the sample plots. Correlation analysis also revealed that there were very strong positive relationships (R>0.90; p<0.01) among all the methods. All the methods can be used in the estimation of percent canopy covers on the crown projections. Ocular estimation was a method that was relatively simple and gave fast results, and the digital square grid and polygon methods yielded more stable results than the binary image method.
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How to cite this article:

M.D. Avsar and V. Ayyildiz, 2010. Estimation of Stand Canopy Cover by Different Methods on Crown Projections: Sample of Lebanon Cedar Stands of the Yavsan Mountain, Kahramanmaras, Turkey. Journal of Applied Sciences, 10: 1326-1330.

DOI: 10.3923/jas.2010.1326.1330

URL: https://scialert.net/abstract/?doi=jas.2010.1326.1330

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