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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
How life history influences population dynamics in fluctuating environments
American Naturalist, Volume 182, No. 6, Year 2013
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Description
A major question in ecology is how age-specific variation in demographic parameters influences population dynamics. Based on long-term studies of growing populations of birds and mammals, we analyze population dynamics by using fluctuations in the total reproductive value of the population. This enables us to account for random fluctuations in age distribution. The influence of demographic and environmental stochasticity on the population dynamics of a species decreased with generation time. Variation in age-specific contributions to total reproductive value and to stochastic components of population dynamics was correlated with the position of the species along the slow-fast continuum of life-history variation. Younger age classes relative to the generation time accounted for larger contributions to the total reproductive value and to demographic stochasticity in "slow" than in "fast" species, in which many age classes contributed more equally. In contrast, fluctuations in population growth rate attributable to stochastic environmental variation involved a larger proportion of all age classes independent of life history. Thus, changes in population growth rates can be surprisingly well explained by basic species-specific life-history characteristics. © 2013 by The University of Chicago. All rights reserved.
Authors & Co-Authors
Sæther, Bernt Erik
Norway, Trondheim
Norges Teknisk-naturvitenskapelige Universitet
Coulson, Tim N.
United Kingdom, Oxford
University of Oxford
Grøtan, Vidar
Norway, Trondheim
Norges Teknisk-naturvitenskapelige Universitet
Engen, Steinar
Norway, Trondheim
Norges Teknisk-naturvitenskapelige Universitet
Altwegg, Res
South Africa, Pretoria
South African National Biodiversity Institute
South Africa, Cape Town
University of Cape Town
Armitage, Kenneth B.
United States, Lawrence
University of Kansas
Barbraud, Christophe
France, Villiers-en-bois
Centre D’études Biologiques de Chizé Cebc
Becker, Peter H.
Germany, Wilhelmshaven
Institut Für Vogelforschung Vogelwarte Helgoland Ifv
Blumstein, Daniel T.
United States, Los Angeles
University of California, Los Angeles
Dobson, F. Stephen
France, Paris
Cnrs Centre National de la Recherche Scientifique
United States, Auburn
Auburn University
Festa-Bianchet, Marco
Canada, Sherbrooke
Université de Sherbrooke
Gaillard, Jean Michel
France, Villeurbanne
Université Claude Bernard Lyon 1
Jenkins, Andrew R.
South Africa, Cape Town
University of Cape Town
Jones, Carl G.
Mauritius, Vacoas
Mauritian Wildlife Foundation
United Kingdom, Jersey
Durrell Wildlife Conservation Trust
Nicoll, Malcolm A.C.
United Kingdom, Reading
University of Reading
Norris, Ken J.
United Kingdom, Reading
University of Reading
Oli, Madan K.
United States, Gainesville
University of Florida
Özgül, Arpat
United States, Gainesville
University of Florida
Switzerland, Zurich
Universität Zürich
Weimerskirch, Henri
France, Villiers-en-bois
Centre D’études Biologiques de Chizé Cebc
Statistics
Citations: 160
Authors: 19
Affiliations: 17
Identifiers
Doi:
10.1086/673497
ISSN:
00030147
Research Areas
Sexual And Reproductive Health
Study Design
Cross Sectional Study