Cohort variation, climate effects and population dynamics in a short-lived lizard

The Journal of Animal Ecology
Jean François Le GalliardManuel Massot

Abstract

1. Demographic theory and empirical studies indicate that cohort variation in demographic traits has substantial effects on population dynamics of long-lived vertebrates but cohort effects have been poorly investigated in short-lived species. 2. Cohort effects were quantified in the common lizard (Zootoca vivipara Jacquin 1787), a short-lived ectothermic vertebrate, for body size, reproductive traits and age-specific survival with mark-recapture data collected from 1989 to 2005 in two wetlands. We assessed cohort variation and covariation in demographic traits, tested the immediate and delayed effects of climate conditions (temperature and rainfall), and predicted consequences for population growth. 3. Most demographic traits exhibited cohort variation, but this variation was stronger for juvenile growth and survival, sub-adult survival and breeding phenology than for other traits. 4. Cohort variation was partly explained by a web of immediate and delayed effects of climate conditions. Rainfall and temperature influenced distinct life-history traits and the periods of gestation and early juvenile life were critical stages for climate effects. 5. Cohort covariation between demographic traits was usually weak, apart from a negati...Continue Reading

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Citations

May 9, 2012·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Sandrine MeylanJean Clobert
Oct 1, 2011·The American Naturalist·Manuela González-SuárezDavid Claessen
Jul 19, 2013·The Journal of Animal Ecology·Marianne MugaboJean-François Le Galliard
Jan 24, 2014·Evolutionary Applications·Mark C UrbanNicole A Freidenfelds
Oct 9, 2015·BMC Evolutionary Biology·Gabriella LjungströmMats Olsson
Jul 9, 2013·Current Biology : CB·Manuel Massot, Pedro Aragón
Apr 16, 2019·Integrative Zoology·Selene Vargas-GarcíaJ Jaime Zúñiga-Vega
Apr 21, 2017·Proceedings. Biological Sciences·Gabriel PigeonFanie Pelletier
Oct 14, 2020·The Journal of Experimental Biology·George A BruschOlivier Lourdais

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