English
Cycles, phase analysis, and synchronization in ecological populations – a tale of four case studies
Multi angle
Auteurs : Blasius, Bernd (Auteur de la conférence)
CIRM (Editeur )
92D25 - Population dynamics (general)
92D40 - Ecology
CIRM (Editeur )
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Résumé :
Cyclic dynamics are one of the most notable phenomena in population biology and are known to occur in many communities both in the wild and the laboratory. Oscillations in biomass often exceed an order of magnitude, with period lengths ranging from days to decades, and may be spatially synchronized over continental scales. Their underlying causes, however, remain a long-standing enigma. In this presentation I will present modelling analysis from my own work for four paradigmatic case studies. These will present a journey from single species laboratory experiments to the world largest population oscillations, both in in period length and in absolute biomass. I will show that the mechanisms driving the cycles and their synchronization to external forcing may be very different in each case (e.g., predator-prey interactions or synchronized life cycles). But despite these idiosyncratic properties, notions from phase analysis and synchronization theory can be applied to capture observed population dynamics, providing a common theoretic framework for understanding these phenomena that have fascinated ecologists for centuries.
Mots-Clés : Population cycle; phase synchronisation; Antarctic krill; predator-prey
Codes MSC : Mots-Clés : Population cycle; phase synchronisation; Antarctic krill; predator-prey
92D25 - Population dynamics (general)
92D40 - Ecology
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Informations sur la Vidéo
Réalisateur : Hennenfent, GuillaumeLangue : Anglais Date de Publication : 10/05/2023 Date de Captation : 25/04/2023 Sous Collection : Research talks Catégorie arXiv : Populations and Evolution Domaine(s) : Systèmes Dynamiques & EDO Format : MP4 (.mp4) - HD Durée : 00:52:35 Audience : Chercheurs ; Etudiants Science Cycle 2 ; Doctoral Students, Post-Doctoral Students Download : https://videos.cirm-math.fr/2023-04-25_Blasius.mp4 
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Informations sur la Rencontre
Nom de la Rencontre : Mathematical Population Dynamics, Ecology and Evolution 2023 / Mathématiques pour la Dynamique des population, l'Ecologie et l'EvolutionOrganisateurs de la Rencontre : Petrovskii, Sergei ; Poggiale, Jean-Christophe ; Touzeau, Suzanne Dates : 24/04/2023 - 28/04/2023 Année de la rencontre : 2023 URL de la Rencontre : https://conferences.cirm-math.fr/2769.html
Données de citation
DOI : 10.24350/CIRM.V.20039603Citer cette vidéo: Blasius, Bernd (2023). Cycles, phase analysis, and synchronization in ecological populations – a tale of four case studies. CIRM. Audiovisual resource. doi:10.24350/CIRM.V.20039603 URI : http://dx.doi.org/10.24350/CIRM.V.20039603 |
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Bibliographie
- BLASIUS, Bernd, HUPPERT, Amit, et STONE, Lewi. Complex dynamics and phase synchronization in spatially extended ecological systems. Nature, 1999, vol. 399, no 6734, p. 354-359. - http://dx.doi.org/10.1038/20676
- MASSIE, Thomas M., BLASIUS, Bernd, WEITHOFF, Guntram, et al. Cycles, phase synchronization, and entrainment in single-species phytoplankton populations. Proceedings of the National Academy of Sciences, 2010, vol. 107, no 9, p. 4236-4241. - https://doi.org/10.1073/pnas.0908725107
- MASSIE, Thomas M., WEITHOFF, Guntram, KUCKLÄNDER, Nina, et al. Enhanced Moran effect by spatial variation in environmental autocorrelation. Nature communications, 2015, vol. 6, no 1, p. 5993. - http://dx.doi.org/10.1038/ncomms6993
- RYABOV, Alexey B., DE ROOS, André M., MEYER, Bettina, et al. Competition-induced starvation drives large-scale population cycles in Antarctic krill. Nature Ecology & Evolution, 2017, vol. 1, no 7, p. 0177. - http://dx.doi.org/10.1038/s41559-017-0177
- BLASIUS, Bernd, RUDOLF, Lars, WEITHOFF, Guntram, et al. Long-term cyclic persistence in an experimental predator–prey system. Nature, 2020, vol. 577, no 7789, p. 226-230. - http://dx.doi.org/10.1038/s41586-019-1857-0
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