Next Thursday 27 May 2023 12:00 am on the Seminar Room - SS6 (Institutes building floor -1), Dr. Josep Sardanyés (CSIC-Universitat Pompeu Fabra) will give a Seminar on "Evidence of a social tipping point in a colonial bird species"
SEMINAR(i):
Evidence of a social tipping point in a colonial bird species
WHO?: Dr. Josep Sardanyés (CSIC-Universitat Pompeu Fabra)
LANGUAGE?: English
WHEN?: Thursday 18/05/2023 - 12:00 am.
WHERE?: Seminar Room - SS6 (Institutes building floor -1)
ABSTRACT:
How populations respond to both abiotic and biotic perturbations is a crucial issue in ecological systems, especially for social species. Furthermore, the long-term environmental and demographic data required to study such responses are scarce. Fitting dynamical models with an artificial intelligence algorithm to population fluctuations of the Audouin’s gull over 40 years [1–4] reveals that feedbacks in dispersal after a cumulative perturbation driven by the presence of predators drive a population collapse. The collapse is well described by a non-linear function mimicking social copying, whereby dispersal made by a few individuals induces others to leave the patch in a behavioral cascade for decision-making to disperse. In providing the first evidence of copying for the emergence of feedbacks in dispersal in a social organism, our results suggest a broader impact of self-organized collective dispersal in complex population dynamics.
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