{"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":54604,"journal":{"name":"Plant Biosystems","volume":"136 1","pages":"217 - 221"},"PeriodicalIF":1.3000,"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":"Plant Biosystems","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1080/11263500212331351119","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PLANT SCIENCES","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：
Plant Biosystems is the research journal edited by the Società Botanica Italiana. Published three times a year, the journal is open to papers dealing with all aspects of plant biology, systematics, and ecology. Research studies containing novel and significant findings, from the molecular level to ecosystems and from micro-organisms to flowering plants, are welcome. Plant Biosystems succeeded " Giornale Botanico Italiano", the historical journal of the Società Botanica Italiana, from the year 1997.
Plant Biosystems has been conceived in consideration of the recent progress in botanical research. An editorial board has been devised to ensure that all the main trends of contemporary plant science are represented. Manuscripts are classified as ''Full Paper'', ''Rapid Report'' or ''Short Communication''. A Rapid Report is intended for publication, in a concise form, of new and relevant findings. The classification as Rapid Report is determined by the Editor. A Short Communication (no more than two printed pages) is for a concise but independent report. It is not intended for publication of preliminary results. Review articles are also published, but only upon invitation by the Editor. An international panel of highly qualified referees warrants the highest scientific standard.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
