Handle URI:
http://hdl.handle.net/10754/596983
Title:
A simple model for skewed species-lifetime distributions
Authors:
Murase, Yohsuke; Shimada, Takashi; Ito, Nobuyasu
Abstract:
A simple model of a biological community assembly is studied. Communities are assembled by successive migrations and extinctions of species. In the model, species are interacting with each other. The intensity of the interaction between each pair of species is denoted by an interaction coefficient. At each time step, a new species is introduced to the system with randomly assigned interaction coefficients. If the sum of the coefficients, which we call the fitness of a species, is negative, the species goes extinct. The species-lifetime distribution is found to be well characterized by a stretched exponential function with an exponent close to 1/2. This profile agrees not only with more realistic population dynamics models but also with fossil records. We also find that an age-independent and inversely diversity-dependent mortality, which is confirmed in the simulation, is a key mechanism accounting for the distribution. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
Citation:
Murase Y, Shimada T, Ito N (2010) A simple model for skewed species-lifetime distributions. New J Phys 12: 063021. Available: http://dx.doi.org/10.1088/1367-2630/12/6/063021.
Publisher:
IOP Publishing
Journal:
New Journal of Physics
KAUST Grant Number:
KUK-I1-005-04
Issue Date:
11-Jun-2010
DOI:
10.1088/1367-2630/12/6/063021
Type:
Article
ISSN:
1367-2630
Sponsors:
We are grateful to P A Rikvold for helpful comments on the manuscript. This work was partially supported by award no. KUK-I1-005-04 from King Abdullah University of Science and Technology (KAUST) and Grant-in-Aid for Young Scientists (B) no. 21740284 to TS from the Ministry of Education, Culture, Sports, Science, and Technology, Japan.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorMurase, Yohsukeen
dc.contributor.authorShimada, Takashien
dc.contributor.authorIto, Nobuyasuen
dc.date.accessioned2016-02-23T13:51:48Zen
dc.date.available2016-02-23T13:51:48Zen
dc.date.issued2010-06-11en
dc.identifier.citationMurase Y, Shimada T, Ito N (2010) A simple model for skewed species-lifetime distributions. New J Phys 12: 063021. Available: http://dx.doi.org/10.1088/1367-2630/12/6/063021.en
dc.identifier.issn1367-2630en
dc.identifier.doi10.1088/1367-2630/12/6/063021en
dc.identifier.urihttp://hdl.handle.net/10754/596983en
dc.description.abstractA simple model of a biological community assembly is studied. Communities are assembled by successive migrations and extinctions of species. In the model, species are interacting with each other. The intensity of the interaction between each pair of species is denoted by an interaction coefficient. At each time step, a new species is introduced to the system with randomly assigned interaction coefficients. If the sum of the coefficients, which we call the fitness of a species, is negative, the species goes extinct. The species-lifetime distribution is found to be well characterized by a stretched exponential function with an exponent close to 1/2. This profile agrees not only with more realistic population dynamics models but also with fossil records. We also find that an age-independent and inversely diversity-dependent mortality, which is confirmed in the simulation, is a key mechanism accounting for the distribution. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.en
dc.description.sponsorshipWe are grateful to P A Rikvold for helpful comments on the manuscript. This work was partially supported by award no. KUK-I1-005-04 from King Abdullah University of Science and Technology (KAUST) and Grant-in-Aid for Young Scientists (B) no. 21740284 to TS from the Ministry of Education, Culture, Sports, Science, and Technology, Japan.en
dc.publisherIOP Publishingen
dc.rightsCreative Commons Attribution Licenseen
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en
dc.titleA simple model for skewed species-lifetime distributionsen
dc.typeArticleen
dc.identifier.journalNew Journal of Physicsen
dc.contributor.institutionUniversity of Tokyo, Tokyo, Japanen
kaust.grant.numberKUK-I1-005-04en
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