Bottom-up and top-down control of dispersal across major organismal groups

Abstract : Ecology and evolution unfold in spatially structured communities, where dispersal links dynamics across scales. Because dispersal is multicausal, identifying general drivers remains challenging. In a coordinated distributed experiment spanning organisms from protozoa to vertebrates, we tested whether two fundamental determinants of local dynamics, top-down and bottom-up control, generally explain active dispersal. We show that both factors consistently increased emigration rates and use metacommunity modelling to highlight consequences on local and regional dynamics.
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Emanuel A Fronhofer, Delphine Legrand, Florian Altermatt, Armelle Ansart, Simon Blanchet, et al.. Bottom-up and top-down control of dispersal across major organismal groups. Nature Ecology & Evolution, Nature, 2018, 2 (12), pp.1859-1863. ⟨10.1038/s41559-018-0686-0⟩. ⟨hal-01936819⟩

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