Anna Vanselow

Anna Vanselow

Anna Vanselow

Location:

Universität Oldenburg, ICBM,
OL Wechloy

Carl-von-Ossietzky-Straße 9-11
26111 Oldenburg

W15 1-105

Tel: +49 (0)441 / 798-3634
Fax: 0441 / 798-3404

Anna Vanselow

Current Project

How fast are environmental conditions allowed to change before ecosystems collapse? In our work, we focus on population dynamical systems that are govered by processes evolving on different time scales. We expose those population dynamical systems to fast changing environmental conditions. Therefore, we use time-dependent parameters changing at certain rates.

By increasing the rate the biological system can track or lose contact to the quasi- static stable state. In the latter case, the population dynamics shifts from stable coexistence to extinction. Because such a transition is solely triggered by rates of environmental change it is called rate-induced tipping.

  • Is there a critical rate?
  • Does the population still collapses if spatial and/or evolutionary dynamics are considered?
  • Can rate-induced tipping trigger plankton blooms?

Scientific interests

  • Nonlinear dynamics and Chaos
  • Theoretical ecology
  • Physical oceanography

Publications

  • Vanselow, A., Wieczorek, S., and Feudel, U. (2019). When very slow is too fast - collapse of a predator-prey system. Journal of Theoretical Biology, 479:64–72.
  • Martin Losch, Annika Fuchs, Jean-Francois Lemieux, Anna Vanselow: A parallel Jacobian-free Newton-Krylov solver for a coupled sea ice-ocean model. J. Comput. Physics257: 901-911 (2014)
  • Singer, A., Schückel, U., Beck, M., Bleich, O., Brumsack, H.-J., Freund, H., Geimecke, C., Lettmann, K.A., Millat, G., Staneva, J., Vanselow, A., Westphal, H., Wolff, J.-O., Wurpts, A., Kröncke, I. (2016). Evaluating species distribution models with historical macrofauna data: a hindcast for the Jade Bay (North Sea, Germany). Marine Ecology Progress Series 551:13-30.
(Stand: 30.04.2021)