The effect of competition on individual tree basal area growth in mature stands of Pinus cooperi Blanco in Durango (Mexico)
The effect of competition on individual tree basal area growth in mature stands of Pinus cooperi Blanco in Durango (Mexico)
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DOI：
10.1007/s10342-005-0061-y
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发表时间：
2005-05
影响因子：
2.8
通讯作者：
J. J. Corral Rivas-J.;J. G. Álvarez. González;O. Aguirre;F. J. Hernández
中科院分区：
文献类型：
--
作者：
J. J. Corral Rivas-J.;J. G. Álvarez. González;O. Aguirre;F. J. Hernández
在本文中，我们评估了如何精心选择的距离依赖和距离无关的竞争指数解释树木，生长在成熟和均匀年龄的林分的松树cooperiBlanco的单株断面积生长。共18个竞争措施进行了分析，其中6个不需要树的位置（距离无关）和12个利用树的位置（距离相关）。采用11种不同的竞争者选择方法研究了林分和/或单株的竞争状况。采用相对于无竞争的均方误差减少值来判断各竞争指标的性能。结果发现，最好的距离无关的竞争指数，以及最好的距离依赖的竞争指数。得出的结论是，BALMOD指数将是一个很好的竞争指数，将纳入进一步的研究区域的单木断面积生长模型。
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 ofPinus cooperiBlanco. 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.