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Habitat dependence and correlations between elasticities of long?term growth rates

Habitat dependence and correlations between elasticities of long?term growth rates
Habitat dependence and correlations between elasticities of long?term growth rates
In population biology, elasticity is a measure of the importance of a demographic rate on population growth. A relatively small amount of stochasticity can substantially impact the dynamics of a population whose growth is a function of deterministic and stochastic processes. Analyses of natural populations frequently neglect the latter. Even in a population that fluctuates substantially with time, the results of a deterministic perturbation analysis correlated strongly with results of a perturbation analysis of the long?run stochastic growth rate. Population growth was, however, not uniformly sensitive to demographic rates across different environmental conditions. The overall correlation between deterministic and stochastic perturbation analysis may be high, but environmental variability can dramatically alter the contributions of demographic rates in different environmental conditions. This potentially informative detail is neglected by deterministic analysis, yet it highlights one difficulty when extrapolating results from long?term analysis to shorter?term environmental change.
demography, markov chain, sensitivity, soay sheep, st kilda, vital rate
0003-0147
424-430
Ezard, Thomas H.G.
a143a893-07d0-4673-a2dd-cea2cd7e1374
Gaillard, Jean‐Michel
87d127f1-98bc-41aa-8c8a-53083503da6f
Crawley, Michael J.
59f9c041-b3a3-43ae-9010-1af4c9b3fe02
Coulson, Tim
65301555-92dd-4f85-a66f-cf07cf1aee98
Ezard, Thomas H.G.
a143a893-07d0-4673-a2dd-cea2cd7e1374
Gaillard, Jean‐Michel
87d127f1-98bc-41aa-8c8a-53083503da6f
Crawley, Michael J.
59f9c041-b3a3-43ae-9010-1af4c9b3fe02
Coulson, Tim
65301555-92dd-4f85-a66f-cf07cf1aee98

Ezard, Thomas H.G., Gaillard, Jean‐Michel, Crawley, Michael J. and Coulson, Tim (2008) Habitat dependence and correlations between elasticities of long?term growth rates. The American Naturalist, 172 (3), 424-430. (doi:10.1086/589897).

Record type: Article

Abstract

In population biology, elasticity is a measure of the importance of a demographic rate on population growth. A relatively small amount of stochasticity can substantially impact the dynamics of a population whose growth is a function of deterministic and stochastic processes. Analyses of natural populations frequently neglect the latter. Even in a population that fluctuates substantially with time, the results of a deterministic perturbation analysis correlated strongly with results of a perturbation analysis of the long?run stochastic growth rate. Population growth was, however, not uniformly sensitive to demographic rates across different environmental conditions. The overall correlation between deterministic and stochastic perturbation analysis may be high, but environmental variability can dramatically alter the contributions of demographic rates in different environmental conditions. This potentially informative detail is neglected by deterministic analysis, yet it highlights one difficulty when extrapolating results from long?term analysis to shorter?term environmental change.

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More information

Published date: September 2008
Keywords: demography, markov chain, sensitivity, soay sheep, st kilda, vital rate
Organisations: Environmental

Identifiers

Local EPrints ID: 344730
URI: http://eprints.soton.ac.uk/id/eprint/344730
ISSN: 0003-0147
PURE UUID: 2b4a5c23-0827-4af0-bdcd-bb9eb25787be
ORCID for Thomas H.G. Ezard: ORCID iD orcid.org/0000-0001-8305-6605

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Date deposited: 31 Oct 2012 11:51
Last modified: 15 Mar 2024 03:46

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Contributors

Author: Thomas H.G. Ezard ORCID iD
Author: Jean‐Michel Gaillard
Author: Michael J. Crawley
Author: Tim Coulson

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