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The effect of competition on individual tree basal area growth in mature stands of Pinus cooperi Blanco in Durango (Mexico) |
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| Authors: | J J Corral Rivas J G Álvarez González Oscar Aguirre F J Hernández | ||
| Institution: | 1. Institut für Waldinventur und Waldwachstum, Georg-August-Universit?t G?ttingen, Büsgenweg 5, 37077, G?ttingen, Germany 2. Departamento de Enxe?ería Agroforestal, Escola Politécnica Superior de Lugo, Universidade de Santiago de Compostela, Campus Universitario s/n, 27002, Lugo, Spain 3. Facultad de Ciencias Forestales, Universidad Autónoma de Nuevo León, 67700, Linares, NL, Mexico 4. Instituto Tecnológico Forestal, Mesa del Tecnológico s/n, 34950, El Salto, P.N., Durango, Mexico |
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| Abstract: | In this paper, we evaluated how well-selected distance-dependent and distance-independent competition indices explain individual tree basal area growth of trees, growing in mature and even-aged stands of Pinus cooperi Blanco. A total of 18 competition measures were analyzed of which six do not need tree location (distance-independent) and 12 that utilize tree location (distance-dependent). The competition situation of a stand and/or an individual tree was studied using 11 different competitor selection methods. The mean square error reduction relative to no-competition was used to judge the performance of each competition index. It was found that the best distance-independent competition indices performed as well as the best distance-dependent competition indices. It was concluded that the BALMOD-index would be a good competition index to be incorporated into further individual tree basal area growth models for the study area.
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| Keywords: | Pinus cooperi Competition indices Individual basal area growth | ||
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