Inferring transient dynamics of human populations from matrix non-normality

Population Ecology
Alex Nicol-HarperThomas Ezard

Abstract

In our increasingly unstable and unpredictable world, population dynamics rarely settle uniformly to long-term behaviour. However, projecting period-by-period through the preceding fluctuations is more data-intensive and analytically involved than evaluating at equilibrium. To efficiently model populations and best inform policy, we require pragmatic suggestions as to when it is necessary to incorporate short-term transient dynamics and their effect on eventual projected population size. To estimate this need for matrix population modelling, we adopt a linear algebraic quantity known as non-normality. Matrix non-normality is distinct from normality in the Gaussian sense, and indicates the amplificatory potential of the population projection matrix given a particular population vector. In this paper, we compare and contrast three well-regarded metrics of non-normality, which were calculated for over 1000 age-structured human population projection matrices from 42 European countries in the period 1960 to 2014. Non-normality increased over time, mirroring the indices of transient dynamics that peaked around the millennium. By standardising the matrices to focus on transient dynamics and not changes in the asymptotic growth rate, w...Continue Reading

References

Feb 11, 1994·Science·J Bongaarts
Mar 29, 2003·Science·Wolfgang LutzSergei Scherbov
May 17, 2006·Trends in Ecology & Evolution·Alan Hastings
May 30, 2006·Theoretical Population Biology·Dave HodgsonDominic McCarthy
Dec 19, 2006·Trends in Ecology & Evolution·C Jessica E Metcalf, Samuel Pavard
Jul 30, 1993·Science·L N TrefethenT A Driscoll
Nov 13, 2010·Ecology Letters·Elizabeth E CroneJennifer L Williams
Jul 28, 2011·Ecology Letters·Iain StottDavid James Hodgson
Jul 30, 2011·Science·Babatunde Osotimehin
Feb 10, 2012·Population and Development Review·Laura Blue, Thomas J Espenshade
Apr 10, 2013·Conservation Biology : the Journal of the Society for Conservation Biology·Elizabeth E CroneEric S Menges
May 10, 2013·Journal of Evolutionary Biology·S Townley, T H G Ezard
Jan 28, 2016·The Journal of Animal Ecology·Roberto Salguero-GómezJames W Vaupel
Mar 15, 2016·The Journal of Ecology·Jenni L McDonaldDave J Hodgson
May 25, 2016·Proceedings of the National Academy of Sciences of the United States of America·Jonathan J AzoseAdrian E Raftery
Oct 25, 2016·Journal of the Royal Statistical Society. Series A, (Statistics in Society)·Arkadiusz WiśniowskiJames Raymer

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