The effect of competition on individual tree basal area growth in mature stands of Pinus cooperi Blanco in Durango (Mexico)

Die Auswirkung der Konkurrenz auf das Einzelbaumgrundflächenwachstum in Altbeständen aus Pinus cooperi Blanco in Durango (Mexiko)

Berlin

2005

4 Abb., 4 Tab., 57 Lit. Ang.

Artikel aus einer ZeitschriftUnselbständiges Werk

638

200136730

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.