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Open AccessArticle

Comparison of the Economic Value of Urban Trees through Surveys with Photographs in Two Seasons

1
Escuela Técnica Superior de Ingenieros de Montes, Forestal y del Medio Natural, Universidad Politécnica de Madrid, Avda. de las Moreras s/n., 28040 Madrid, Spain
2
Buildings, Infrastructures and Projects for Rural and Environmental Engineering (BIPREE), Universidad Politécnica de Madrid, Ciudad Universitaria s/n., 28040 Madrid, Spain
3
SILVANET. Research Group for Sustainable Environmental Management, Universidad Politécnica de Madrid, Ciudad Universitaria s/n., 28040 Madrid, Spain
*
Author to whom correspondence should be addressed.
Forests 2018, 9(3), 132; https://doi.org/10.3390/f9030132
Received: 22 January 2018 / Revised: 28 February 2018 / Accepted: 8 March 2018 / Published: 10 March 2018
(This article belongs to the Special Issue Participatory Forestry: Involvement, Information and Science)
Urban trees are generally considered to be a public asset and are an important part of a city’s heritage. The aim of this work is to analyse the influence of season on the economic appraisal of various trees in Madrid. Photographs were taken of 43 individual tree specimens in summer and winter. The survey was designed to compare differences of opinion in the economic assessment of trees. The trees were assessed by eight valuation methods used worldwide. A total of 78 agroforestry engineering students answered a written survey, and the variables considered were: percentage of students who always evaluated the tree equally (%0), percentage of students who assigned more value to the summer photograph (%S), and percentage of students who assigned more value to the winter photograph (%W). The results were analysed by the statistical test of equal proportions and ANOVA to detect differences according to tree type (evergreen or deciduous), species, and other groupings made by the authors in previous works. W and S percentages are similar. The ANOVA analysis rejects the equality of percentages of S and W between groups. The Welch test rejects the equality of the percentage of S, W, and O between species. View Full-Text
Keywords: appraisal; urban trees; public opinion; photography; summer-winter appraisal; urban trees; public opinion; photography; summer-winter
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García-Ventura, C.; Sánchez-Medina, Á.; Grande-Ortíz, M.Á.; González-García, C.; Ayuga-Téllez, E. Comparison of the Economic Value of Urban Trees through Surveys with Photographs in Two Seasons. Forests 2018, 9, 132.

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