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Using evolutionary demography to link life history theory, quantitative genetics and population ecology
Author(s) -
Coulson Tim,
Tuljapurkar Shripad,
Childs Dylan Z.
Publication year - 2010
Publication title -
journal of animal ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.134
H-Index - 157
eISSN - 1365-2656
pISSN - 0021-8790
DOI - 10.1111/j.1365-2656.2010.01734.x
Subject(s) - population , biology , ecology , life history theory , life history , quantitative genetics , population growth , vital rates , population model , demography , range (aeronautics) , demographic analysis , population ecology , fertility , evolutionary biology , sociology , genetic variation , materials science , composite material
Summary 1. There is a growing number of empirical reports of environmental change simultaneously influencing population dynamics, life history and quantitative characters. We do not have a well‐developed understanding of links between the dynamics of these quantities. 2. Insight into the joint dynamics of populations, quantitative characters and life history can be gained by deriving a model that allows the calculation of fundamental quantities that underpin population ecology, evolutionary biology and life history. The parameterization and analysis of such a model for a specific system can be used to predict how a population will respond to environmental change. 3. Age‐stage‐structured models can be constructed from character‐demography associations that describe age‐specific relationships between the character and: (i) survival; (ii) fertility; (iii) ontogenetic development of the character among survivors; and (iv) the distribution of reproductive allocation. 4. These models can be used to calculate a wide range of useful biological quantities including population growth and structure; terms in the Price equation including selection differentials; estimates of biometric heritabilities; and life history descriptors including generation time. We showcase the method through parameterization of a model using data from a well‐studied population of Soay sheep Ovis aries . 5. Perturbation analysis is used to investigate how the quantities listed in summary point 4 change as each parameter in each character‐demography function is altered. 6. A wide range of joint dynamics of life history, quantitative characters and population growth can be generated in response to changes in different character‐demography associations; we argue this explains the diversity of observations on the consequences of environmental change from studies of free‐living populations. 7. The approach we describe has the potential to explain within and between species patterns in quantitative characters, life history and population dynamics.