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

Emanuel A Fronhofer; Delphine Legrand; Florian Altermatt; Armelle Ansart; Simon Blanchet; Dries Bonte; Alexis Chaine; Maxime Dahirel; Frederik de Laender; Jonathan de Raedt; Lucie Di Gesu; Staffan Jacob; Oliver Kaltz; Estelle Laurent; Chelsea J Little; Luc Madec; Florent Manzi; Stefano Masier; Felix Pellerin; Frank Pennekamp; Nicolas Schtickzelle; Lieven Therry; Alexandre Vong; Laurane Winandy; Julien Cote

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

Emanuel A Fronhofer ^{1, 2, 3} Delphine Legrand ⁴ Florian Altermatt ^{1, 3} Armelle Ansart ⁵ Simon Blanchet ^{4, 6} Dries Bonte ⁷ Alexis Chaine ⁴ Maxime Dahirel ^{5, 7} Frederik de Laender Jonathan de Raedt ⁷ Lucie Di Gesu ⁶ Staffan Jacob ⁸ Oliver Kaltz ² Estelle Laurent ⁸ Chelsea J Little ^{3, 1} Luc Madec ⁵ Florent Manzi ² Stefano Masier ⁷ Felix Pellerin ⁶ Frank Pennekamp ³ Nicolas Schtickzelle ⁸ Lieven Therry ⁴ Alexandre Vong ⁴ Laurane Winandy ⁶ Julien Cote ⁶

1 EAWAG - Swiss Federal Insitute of Aquatic Science and Technology [Dübendorf]

2 UMR ISEM - Institut des Sciences de l'Evolution de Montpellier

3 UZH - Universität Zürich [Zürich]

4 SETE - Station d'écologie théorique et expérimentale

5 ECOBIO - Ecosystèmes, biodiversité, évolution [Rennes]

6 EDB - Evolution et Diversité Biologique

7 UGENT - Ghent University [Belgium]

8 UCL - Université Catholique de Louvain

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.

Document type :

Journal articles

Domain :

Environmental Sciences / Biodiversity and Ecology

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