00:00:00 / 00:00:00

Invasions (and extinctions) in ecological communities : the role of invasion fitness and feedbacks

By Jean-François Arnoldi

Appears in collection : 2022 - T1 - WS3 - Mathematical models in ecology and evolution

Theory in ecology and evolution often relies on the analysis of invasion processes, and general approaches exist to understand the early stages of an invasion. However, predicting the long-term transformations of communities following an invasion remains challenging. I will describe some theoretical work that uses the density dependence of an invading population's growth rate to predict if the invasion will cause large long-term impacts on the invaded community, such as irreversible compositional shifts. We will see that the density dependence of the invasion growth rate is as much a property of the invading population as it is one of the invaded community, which will allow us to clarify the conditions for abrupt community shifts along smooth environmental gradients, triggered by invasions or extinctions. All in all, this theoretical work directs us towards new questions that may enrich the toolset of invasion analysis (for both ecology and evolution), and suggests that indirect interactions and dynamical stability are key determinants of invasion outcomes.

Information about the video

Citation data

  • DOI 10.57987/IHP.2022.T1.WS3.012
  • Cite this video Arnoldi Jean-François (3/24/22). Invasions (and extinctions) in ecological communities : the role of invasion fitness and feedbacks. IHP. Audiovisual resource. DOI: 10.57987/IHP.2022.T1.WS3.012
  • URL https://dx.doi.org/10.57987/IHP.2022.T1.WS3.012

Last related questions on MathOverflow

You have to connect your Carmin.tv account with mathoverflow to add question

Ask a question on MathOverflow




Register

  • Bookmark videos
  • Add videos to see later &
    keep your browsing history
  • Comment with the scientific
    community
  • Get notification updates
    for your favorite subjects
Give feedback