死亡率是有机生长和直径结构的数学函数

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2002-01-01 DOI:10.1080/11263500212331351119

Jorge Ignacio del Valle-Arango

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引用次数: 3

摘要

提出了一种间接确定指数死亡率系数(λ)和年死亡率(m)的方法。在这种方法中，这两个参数都是从有机生长模型(von Bertalanffy)和非均匀年龄种群结构模型(De Liocourt和Meyer)中数学推导出来的，该模型用于森林树木，该模型将个体的频率与大小类别联系起来。所得方程允许确定任意两个年龄t1和t2之间的λ或m的瞬时值或平均值。这两个死亡率概念被用来确定半衰期(t 0.5)作为λ和m的函数。该方法被应用于确定哥伦比亚太平洋海岸森林湿地中生长的热带树木Otoba gracilipes (Myristicaceae)的死亡率和半衰期曲线。

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Mortality as a mathematical function of organic growth and diameter structure

ABSTRACT An indirect method to determine the exponential mortality coefficient (λ) as well as the annual mortality (m) is proposed. In this method, both parameters are deduced mathematically from a model of organic growth (von Bertalanffy) and from a model of uneven-aged population structure (De Liocourt and Meyer) used with forest trees, which relates the frequency of individuals by size classes. The resultant equations allow the determination of either the instantaneous or mean value for λ or m between any two ages t 1 and t 2. Both concepts of mortality were used to determine the half-life (t 0.5) as a function of λ and m . The method is applied to determine the curves of mortality and the half-life of Otoba gracilipes (Myristicaceae), a tropical tree that grows in the forested wetlands of the Colombian Pacific coast.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.