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On the brink between extinction and persistence

Pertoldi, Cino; Bach, Lars LU and Loeschcke, Volker (2008) In Biology Direct 3.
Abstract
The nature of size fluctuations is crucial in forecasting future population persistence, independently of whether the variability stems from external forces or from the dynamics of the population renewal process. The risk of intercepting zero is highly dependent on the way the variance of the population size relates to its mean. The minimum population size required for a population not to go extinct can be determined by a scaling equation relating the variance to the arithmetic mean. By the use of a derived expression for the harmonic mean defined by the parameters of the scaling equation we show how it is possible to separate the domains of persistence from those of extinction and to facilitate the identification of populations on the... (More)
The nature of size fluctuations is crucial in forecasting future population persistence, independently of whether the variability stems from external forces or from the dynamics of the population renewal process. The risk of intercepting zero is highly dependent on the way the variance of the population size relates to its mean. The minimum population size required for a population not to go extinct can be determined by a scaling equation relating the variance to the arithmetic mean. By the use of a derived expression for the harmonic mean defined by the parameters of the scaling equation we show how it is possible to separate the domains of persistence from those of extinction and to facilitate the identification of populations on the brink of extinction. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Biology Direct
volume
3
publisher
BioMed Central
external identifiers
  • wos:000262155800001
  • scopus:58149358970
ISSN
1745-6150
DOI
10.1186/1745-6150-3-47
language
English
LU publication?
yes
id
d647fcce-d747-45af-900c-b91b92621841 (old id 1376268)
date added to LUP
2009-04-24 12:25:16
date last changed
2017-05-28 04:12:58
@article{d647fcce-d747-45af-900c-b91b92621841,
  abstract     = {The nature of size fluctuations is crucial in forecasting future population persistence, independently of whether the variability stems from external forces or from the dynamics of the population renewal process. The risk of intercepting zero is highly dependent on the way the variance of the population size relates to its mean. The minimum population size required for a population not to go extinct can be determined by a scaling equation relating the variance to the arithmetic mean. By the use of a derived expression for the harmonic mean defined by the parameters of the scaling equation we show how it is possible to separate the domains of persistence from those of extinction and to facilitate the identification of populations on the brink of extinction.},
  articleno    = {47},
  author       = {Pertoldi, Cino and Bach, Lars and Loeschcke, Volker},
  issn         = {1745-6150},
  language     = {eng},
  publisher    = {BioMed Central},
  series       = {Biology Direct},
  title        = {On the brink between extinction and persistence},
  url          = {http://dx.doi.org/10.1186/1745-6150-3-47},
  volume       = {3},
  year         = {2008},
}