Tanaka Kenzo , Daisuke Hattori , Paulus Meleng , Mohd Effendi Wasli , Tomoaki Ichie
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To estimate bark biomass, allometric equations using tree diameter, height, and crown diameter were developed by combining previous data from adjacent forests with the present data. We found no significant relationship between tree size and most bark nutrient concentrations, though all nutrient concentrations of the two pioneer trees were significantly higher than those of primary forest tree species. Surprisingly, no relationship was found between the soil and bark nutrient concentrations for either species. All the size parameters used in the allometric equations accurately estimated bark biomass. There were no differences in equations between the two species when diameter served as an explanatory variable, but differences were apparent when height and crown diameter were so used. A comparison of allometric equations that yielded the bark biomasses of different types of forest showed that the bark biomass of the tropical secondary forest trees was less than half of that of tropical dry forest trees of the same diameter. 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This study investigated the concentrations of six bark nutrients (nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), and sodium (Na)) by individual tree size and the soil nutrient concentrations for two major pioneer species (<em>Macaranga gigantea</em> and <em>M</em>. <em>hosei</em>) of Malaysia. To estimate bark biomass, allometric equations using tree diameter, height, and crown diameter were developed by combining previous data from adjacent forests with the present data. We found no significant relationship between tree size and most bark nutrient concentrations, though all nutrient concentrations of the two pioneer trees were significantly higher than those of primary forest tree species. Surprisingly, no relationship was found between the soil and bark nutrient concentrations for either species. All the size parameters used in the allometric equations accurately estimated bark biomass. There were no differences in equations between the two species when diameter served as an explanatory variable, but differences were apparent when height and crown diameter were so used. A comparison of allometric equations that yielded the bark biomasses of different types of forest showed that the bark biomass of the tropical secondary forest trees was less than half of that of tropical dry forest trees of the same diameter. 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引用次数: 0
摘要
树皮覆盖着巨大树木的整个树干,具有高级生理功能和养分浓度,因此,研究树皮养分特征和开发估算热带树木树皮生物量的模型对于了解森林养分循环和树木生态特征至关重要。本研究调查了马来西亚两个主要先锋树种(Macaranga gigantea 和 M. hosei)树皮六种养分(氮、磷、钾、钙、镁、钠)的浓度,并根据树的个体大小和土壤养分浓度进行了分析。为了估算树皮生物量,我们将以前邻近森林的数据与现在的数据相结合,利用树木直径、高度和树冠直径建立了异速方程。我们发现,虽然两种先锋树种的所有营养浓度都明显高于原始森林树种,但树木大小与大多数树皮营养浓度之间没有明显关系。令人惊讶的是,两种树种的土壤养分浓度与树皮养分浓度之间都没有关系。异速方程中使用的所有大小参数都能准确估计树皮生物量。当直径作为解释变量时,两种树种的方程没有差异,但当高度和冠径作为解释变量时,差异就很明显了。对得出不同类型森林树皮生物量的异速方程进行比较后发现,热带次生林树木的树皮生物量不到相同直径的热带干旱林树木的一半。因此,使用不恰当的方程和养分浓度会增加在估算树皮生物量和森林养分循环时出现严重错误的可能性。
Bark biomass and nutrient concentrations in tropical secondary forest trees of Malaysia
Given the high-level physiological functions and nutrient concentrations of bark that cover the entire trunks of huge trees, research into bark nutrient traits and the development of models that estimate the bark biomass of tropical trees is essential when it is sought to understand forest nutrient cycling and tree ecological traits. This study investigated the concentrations of six bark nutrients (nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), and sodium (Na)) by individual tree size and the soil nutrient concentrations for two major pioneer species (Macaranga gigantea and M. hosei) of Malaysia. To estimate bark biomass, allometric equations using tree diameter, height, and crown diameter were developed by combining previous data from adjacent forests with the present data. We found no significant relationship between tree size and most bark nutrient concentrations, though all nutrient concentrations of the two pioneer trees were significantly higher than those of primary forest tree species. Surprisingly, no relationship was found between the soil and bark nutrient concentrations for either species. All the size parameters used in the allometric equations accurately estimated bark biomass. There were no differences in equations between the two species when diameter served as an explanatory variable, but differences were apparent when height and crown diameter were so used. A comparison of allometric equations that yielded the bark biomasses of different types of forest showed that the bark biomass of the tropical secondary forest trees was less than half of that of tropical dry forest trees of the same diameter. Thus, the use of inappropriate equations and nutrient concentrations increases the possibility of serious errors in estimating bark biomass and forest nutrient cycles.
Forest EcosystemsEnvironmental Science-Nature and Landscape Conservation
CiteScore
7.10
自引率
4.90%
发文量
1115
审稿时长
22 days
期刊介绍:
Forest Ecosystems is an open access, peer-reviewed journal publishing scientific communications from any discipline that can provide interesting contributions about the structure and dynamics of "natural" and "domesticated" forest ecosystems, and their services to people. The journal welcomes innovative science as well as application oriented work that will enhance understanding of woody plant communities. Very specific studies are welcome if they are part of a thematic series that provides some holistic perspective that is of general interest.