Tree above-ground biomass allometries for carbon stocks estimation in the natural forests of Colombia
Tree above-ground biomass allometries for carbon stocks estimation in the natural forests of Colombia
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DOI：
10.1016/j.foreco.2011.12.013
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发表时间：
2012-03-01
影响因子：
3.7
通讯作者：
Rodriguez, Leonidas
中科院分区：
文献类型：
--
作者：
Alvarez, Esteban;Duque, Alvaro;Rodriguez, Leonidas
本研究分析了哥伦比亚不同生物地理区域631棵直径>= 10 cm乔木的地上生物量数据。本研究的目的是：(1)评估最常用的泛热带异速生长模型用于估算复杂环境梯度不同地点天然林地上生物量的准确性；(2)开发新的模型，以更精确地估算哥伦比亚天然林生态系统地上生物量的当前碳储量。(3)评价异速生长模式作为地上生物量变化的决定因素的影响。Brown等人（1989）的湿润森林模型，包括直径、高度和木材密度，在哥伦比亚的地点显示出总体上最好的表现。Chave et al.（2005；以下简称Chave II）的II型模型（包括直径和木材密度，但不包括高度）倾向于显著高估哥伦比亚研究地点的地上生物量（54.7 +/- 135.7%）。与Chave的分类方法相比，基于生活区系统的森林分类方法在个体尺度和立地尺度上获得了更好的AGB估算模型。我们的研究结果表明，在将Chave II模型用于给定的生态系统之前，应该对其进行评估。对于哥伦比亚，采用直径、木材密度和高度的新异速生长模型可以帮助我们提高对碳循环的理解。当考虑海拔和其他复杂的环境梯度时，森林类型分类是估算地上生物量的重要决定因素。这里提出的新模型可以被认为是评估新热带国家天然林地上生物量碳储量的另一种选择。(C) 2011 Elsevier B.V.版权所有
In this study, we analyzed the above-ground biomass data for 631 trees with a diameter >= 10 cm from different biogeographical regions in Colombia. The aims of this research were (1) to evaluate the accuracy of the most commonly employed pantropical allometric models for the estimation of above-ground biomass of natural forests in different sites located along a complex environmental gradient, (2) to develop new models that enable more precise estimations of current carbon stores in the above-ground biomass of natural forest ecosystems in Colombia, and (3) to evaluate the effect on allometric models of forest type classifications as determinants of above-ground biomass variation. The Brown et al. (1989) model for moist forests, which includes diameter, height, and wood density, showed the overall best performance in Colombian sites. The Type II models of Chave et al. (2005; hereafter Chave II), which include diameter and wood density but not height, tended to strikingly overestimate the above-ground biomass (54.7 +/- 135.7%) in the studied Colombian sites. The use of forest classification based on the life zone system systematically led to better statistical models to estimate AGB at the individual scale and site scale than the use of Chave's classification. Our results propose that Chave II models should be evaluated prior to their use for a given ecosystem. For Colombia, the new allometric models developed, which employed diameter, wood density, and height, could help improving our understanding of the carbon cycle. Forest type classification was found to be an important determinant of the above-ground biomass estimation when altitudinal and other complex environmental gradients are included. The new models presented here can be considered as an alternative option for assessing carbon stocks in the above-ground biomass of natural forests in neotropical countries. (C) 2011 Elsevier B.V. All rights reserved.