{"title":"Mortality as a mathematical function of organic growth and diameter structure","authors":"Jorge Ignacio del Valle-Arango","doi":"10.1080/11263500212331351119","DOIUrl":null,"url":null,"abstract":"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.","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":null,"pages":null},"PeriodicalIF":16.4000,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/11263500212331351119","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Accounts of Chemical Research","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1080/11263500212331351119","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 3
Abstract
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.
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.
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