The emergence of phase asynchrony and frequency modulation in metacommunities

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dc.contributor.authorGuichard, Frederic
dc.contributor.authorZhang, Yuxiang
dc.contributor.authorLutscher, Frithjof
dc.date.accessioned2020-11-18T17:07:10Z
dc.date.available2020-11-18T17:07:10Z
dc.date.issued2019
dc.identifier.issn1874-1738
dc.identifier.urihttp://hdl.handle.net/10393/41462
dc.description.abstractSpatial synchrony can summarize complex patterns of population abundance. Studies of phase synchrony predict that limited dispersal can drive either in-phase or out-of-phase synchrony, characterized by a constant phase difference among populations. We still lack an understanding of ecological processes leading to the loss of phase synchrony. Here we study the role of limited dispersal as a cause of phase asynchrony defined as fluctuating phase differences among populations. We adopt a minimal predator-prey model allowing for dispersal-induced phase asynchrony, and show its dependence on species traits. We show that phase asynchrony in a homogeneous metacommunity requires a minimum of three communities and is characterized by the emergence of regional frequency modulation of population fluctuations. This frequency modulation results in spectral signatures in local time series that can be used to infer the causes and properties of metacommunity dynamics. Dispersal-induced phase asynchrony extends the application of ecological theories of synchrony to non stationary time series, and predicts observed spatiotemporal patterns in marine metacommunities.
dc.language.isoen
dc.titleThe emergence of phase asynchrony and frequency modulation in metacommunities
dc.typeArticle
dc.identifier.doi10.1007/s12080-018-0398-8
CollectionMathématiques et statistiques // Mathematics and Statistics

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