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Temporal scale of environmental correlations affects ecological synchrony

Desharnais, Robert A. and Reuman, Daniel C. and Costantino, Robert F. and Cohen, Joel E. (2018) Temporal scale of environmental correlations affects ecological synchrony. Ecology Letters, 21 (12). pp. 1800-1811. ISSN 1461-023X.

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Population densities of a species measured in different locations are often correlated over time, a phenomenon referred to as synchrony. Synchrony results from dispersal of individuals among locations and spatially correlated environmental variation, among other causes. Synchrony is often measured by a correlation coefficient. However, synchrony can vary with timescale. We demonstrate theoretically and experimentally that the timescale‐specificity of environmental correlation affects the overall magnitude and timescale‐specificity of synchrony, and that these effects are modified by population dispersal. Our laboratory experiments linked populations of flour beetles by changes in habitat size and dispersal. Linear filter theory, applied to a metapopulation model for the experimental system, predicted the observed timescale‐specific effects. The timescales at which environmental covariation occurs can affect the population dynamics of species in fragmented habitats.

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Additional Information:© 2018 John Wiley & Sons Ltd/CNRS. Version of Record online: 19 September 2018; Manuscript accepted: 16 August 2018; Manuscript revised: 04 May 2018; Manuscript received: 19 March 2018. Funding: US National Science Foundation (NSF). Grant Numbers: DMS‐1225529, 1442595, 1714195. James S. McDonnell Foundation. University of Kansas.
Funding AgencyGrant Number
James S. McDonnell FoundationUNSPECIFIED
University of KansasUNSPECIFIED
Subject Keywords:Ecological synchrony; environmental correlations; metapopulations; microcosm experiments; Moran effect; population dispersal; spectral analysis; Tribolium
Record Number:CaltechAUTHORS:20180924-075918030
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Official Citation:Desharnais, R. A., Reuman, D. C., Costantino, R. F. and Cohen, J. E. (2018), Temporal scale of environmental correlations affects ecological synchrony. Ecol Lett, 21: 1800-1811. doi:10.1111/ele.13155
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:89885
Deposited By: Tony Diaz
Deposited On:24 Sep 2018 22:48
Last Modified:20 Nov 2018 18:29

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