Modeling scenic beauty of squirrel-damaged Cryptomeria (Cryptomeria japonica) stands before and after dead-tree disposal
1994
Yang, Y.C. (National Taiwan Univ., Taipei) | Kung, F.H.
The psychophysical definition of forest scenic beauty is the result of the interaction between the physical features of the environment and the perceptual and judgment process of a human observer. Squirrel damage in a cryptomeria (Cryptomeria japonica D. Don) stand has caused tree mortality and changed the stand structure. Therefore it will make an impact on the forest scenic beauty. In this study, a total of 20 cryptomeria stands with different degrees of squirrel-damage wee selected in the Experimental Forest of Taiwan University. Within each damaged stand, a plot was selected randomly. Stand measurements on each plot, before, dead-tree disposal, included dbhs (diameters of breast heights), total heights, bole heights, number of trees damaged, degrees and types of damages. color photographs and color slides were made within each damaged stand before and after cuttings. Four groups of people were invited as viewers. During the on-site observations and the viewing of photographs and slides, they were asked to give an aesthetic rating for each stand, ranging from 0 to 10. Standardized aesthetic scores were used to model the experimental membership function for the fuzzy sets of scenic beauty. A regression model, using the aesthetic scores as a dependent variable and plot measurements as independent variables, was developed for planning forest protection and forest recreation needs. Examples of integrating scenic quality into a multiple use decision-making framework and expert system are given in this paper
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