SKM 2021 – scientific programme

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SYCE: Symposium Climate and energy: Challenges and options from a physics perspective

SYCE 1: Climate and energy: Challenges and options from a physics perspective

SYCE 1.1: Invited Talk

Thursday, September 30, 2021, 13:30–14:00, Audimax 1

Why Ergodicity Breaking from Climate Change matters in Ecosystems? — •Jan Nagler — Centre for Human and Machine Intelligence, Frankfurt

We show that and how ergodicity breaking due to temperature fluctuations adds up to the effects from rising temperatures and increasing fluctuations. Ergodicity breaking fluctuation-induced phenomena are well known in finance, where volatility can turn winning trading strategies into losing ones, or losing strategies into winning strategies. In physics, ergodicity breaking can result in an array of anomalous behaviours in stochastic systems. We show how ecosystems and evolutionary dynamics are affected. Ergodicity breaking in ecosystems may even dominate other effects from climate change. We report on a field study in nematodes on La Reunion Island that have adapted to temperature fluctuations. Ergodicity breaking leads to a shift of the adapted mean temperature, which we predict from first principles.