PMID: 9419355Feb 21, 1998Paper

Patterns of variance in stage-structured populations: evolutionary predictions and ecological implications

Proceedings of the National Academy of Sciences of the United States of America
C A Pfister

Abstract

Variability in population growth rate is thought to have negative consequences for organism fitness. Theory for matrix population models predicts that variance in population growth rate should be the sum of the variance in each matrix entry times the squared sensitivity term for that matrix entry. I analyzed the stage-specific demography of 30 field populations from 17 published studies for pattern between the variance of a demographic term and its contribution to population growth. There were no instances in which a matrix entry both was highly variable and had a large effect on population growth rate; instead, correlations between estimates of temporal variance in a term and contribution to population growth (sensitivity or elasticity) were overwhelmingly negative. In addition, survivorship or growth sensitivities or elasticities always exceeded those of fecundity, implying that the former two terms always contributed more to population growth rate. These results suggest that variable life history stages tend to contribute relatively little to population growth rates because natural selection may alter life histories to minimize stages with both high sensitivity and high variation.

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Citations

Apr 29, 2006·Oecologia·Res AltweggLukas Jenni
Jul 12, 2007·Oecologia·Elizabeth B Harper, Raymond D Semlitsch
Aug 10, 2007·Oecologia·Arpat OzgulKenneth B Armitage
Sep 3, 2013·Experimental & Applied Acarology·Pedro Aurélio Costa Lima Pequeno, Elizabeth Franklin
May 24, 2005·Mathematical Biosciences·Steinar EngenHenri Weimerskirch
Nov 5, 1999·Trends in Ecology & Evolution·T G Benton, A Grant
Jun 25, 2010·Proceedings. Biological Sciences·Dylan Z ChildsMark Rees
Jun 18, 2010·Proceedings. Biological Sciences·Thomas E ReedMichael T Kinnison
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May 6, 2009·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Shripad TuljapurkarTim Coulson
Jun 23, 2010·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Jean-Michel GaillardBram Van Moorter
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Jul 30, 2010·Ecological Applications : a Publication of the Ecological Society of America·Valery E ForbesPeter Calow
Oct 16, 2010·Ecological Applications : a Publication of the Ecological Society of America·Heather E JohnsonJohn D Wehausen
Jan 1, 2014·Proceedings of the National Academy of Sciences of the United States of America·Peter B AdlerMiguel Franco
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May 19, 2006·Ecological Applications : a Publication of the Ecological Society of America·Nicholas J Gotelli, Aaron M Ellison

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