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Scaling of the mean and variance of population dynamics under fluctuating regimes

Pertoldi, Cino; Faurby, S.; Reed, D. H.; Knape, J.; Bjorklund, M.; Lundberg, Per LU ; Kaitala, V.; Loeschcke, V. and Bach, L. A. (2014) In Theory in Biosciences 133(3-4). p.165-173
Abstract
Theoretical ecologists have long sought to understand how the persistence of populations depends on the interactions between exogenous (biotic and abiotic) and endogenous (e.g., demographic and genetic) drivers of population dynamics. Recent work focuses on the autocorrelation structure of environmental perturbations and its effects on the persistence of populations. Accurate estimation of extinction times and especially determination of the mechanisms affecting extinction times is important for biodiversity conservation. Here we examine the interaction between environmental fluctuations and the scaling effect of the mean population size with its variance. We investigate how interactions between environmental and demographic stochasticity... (More)
Theoretical ecologists have long sought to understand how the persistence of populations depends on the interactions between exogenous (biotic and abiotic) and endogenous (e.g., demographic and genetic) drivers of population dynamics. Recent work focuses on the autocorrelation structure of environmental perturbations and its effects on the persistence of populations. Accurate estimation of extinction times and especially determination of the mechanisms affecting extinction times is important for biodiversity conservation. Here we examine the interaction between environmental fluctuations and the scaling effect of the mean population size with its variance. We investigate how interactions between environmental and demographic stochasticity can affect the mean time to extinction, change optimal patch size dynamics, and how it can alter the often-assumed linear relationship between the census size and the effective population size. The importance of the correlation between environmental and demographic variation depends on the relative importance of the two types of variation. We found the correlation to be important when the two types of variation were approximately equal; however, the importance of the correlation diminishes as one source of variation dominates. The implications of these findings are discussed from a conservation and eco-evolutionary point of view. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Environmental variability, Effective population size, Extinction, Scaling effect, Temporal autocorrelations in the environment
in
Theory in Biosciences
volume
133
issue
3-4
pages
165 - 173
publisher
Springer
external identifiers
  • wos:000344791500005
  • scopus:84933501851
ISSN
1431-7613
DOI
10.1007/s12064-014-0201-3
language
English
LU publication?
yes
id
ea20e01c-34c8-4bb5-8df0-35d6cf0e5ac9 (old id 4865177)
date added to LUP
2014-12-18 10:15:51
date last changed
2017-01-01 05:41:35
@article{ea20e01c-34c8-4bb5-8df0-35d6cf0e5ac9,
  abstract     = {Theoretical ecologists have long sought to understand how the persistence of populations depends on the interactions between exogenous (biotic and abiotic) and endogenous (e.g., demographic and genetic) drivers of population dynamics. Recent work focuses on the autocorrelation structure of environmental perturbations and its effects on the persistence of populations. Accurate estimation of extinction times and especially determination of the mechanisms affecting extinction times is important for biodiversity conservation. Here we examine the interaction between environmental fluctuations and the scaling effect of the mean population size with its variance. We investigate how interactions between environmental and demographic stochasticity can affect the mean time to extinction, change optimal patch size dynamics, and how it can alter the often-assumed linear relationship between the census size and the effective population size. The importance of the correlation between environmental and demographic variation depends on the relative importance of the two types of variation. We found the correlation to be important when the two types of variation were approximately equal; however, the importance of the correlation diminishes as one source of variation dominates. The implications of these findings are discussed from a conservation and eco-evolutionary point of view.},
  author       = {Pertoldi, Cino and Faurby, S. and Reed, D. H. and Knape, J. and Bjorklund, M. and Lundberg, Per and Kaitala, V. and Loeschcke, V. and Bach, L. A.},
  issn         = {1431-7613},
  keyword      = {Environmental variability,Effective population size,Extinction,Scaling effect,Temporal autocorrelations in the environment},
  language     = {eng},
  number       = {3-4},
  pages        = {165--173},
  publisher    = {Springer},
  series       = {Theory in Biosciences},
  title        = {Scaling of the mean and variance of population dynamics under fluctuating regimes},
  url          = {http://dx.doi.org/10.1007/s12064-014-0201-3},
  volume       = {133},
  year         = {2014},
}