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2019:courses:kraenkel:single_species

Single species - additional resources

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History and epistemology

  • Population dynamics from first principles. Chapter 2 from Complex Population Dynamics. Peter Turchin, Princeton Univ Press, 2003.
  • Modelling Nature, Sharon Kingsland, Chicago Univ Press.
  • Podani, J., Kun, Á. and Szilágyi, A., 2017. How Fast Does Darwin’s Elephant Population Grow?. Journal of the History of Biology, pp.1-23. A historical and mathematical account of the most famous back-of-envelope calculation in population dynamics.

Second-order ODEs

Differential equations used to described population dynamics are in general of first order. In the book Ecological Orbits Lev Ginzburg and Mark Colyvan make a strong point that second-order equations bring out important insights on population dynamics. In a nutshell, they stress that acceleration should be modelled instead of velocities to fully understand how populations grow and decline.

Counting individuals

Classical models of population dynamics assumes that the size of populations at different times are measurable. Two important issues here are:

What is an individual?

As odd as it may sound, this is a difficult question for a huge proportion of organisms. Therefore defining birth and death is far from trivial. The two best known cases, not mutually exclusive are:

What is the size of a population?

In general we do not know the exact size of populations in field or even in lab conditions. The same is true for other demographic parameters, like survival or fecundity. So we have to rely on estimates of population parameters. This is a very active topic in ecological statistics. See Chapter I of the book Occupancy Estimation and Modeling for a nice overview.

2019/courses/kraenkel/single_species.txt · Last modified: 2024/01/09 18:45 by 127.0.0.1