übertool: web applications for ecological risk assessment (beta version)
Cloud-based environmental models used by the USEPA for evaluating pesticide risks to ecosystems under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) and the Endangered Species Act (ESA).
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Yule-Furry Markov Process Overview


Yule-Furry Markov process is also known as the pure birth process, which models the growth of population under ideal conditions:

  • the population size will not decrease (no mortality)
  • no interspecies competition
  • no internal population structure, the birth rate is the same for each individual
  • Yule-Furry process was originally introduced by Yule (1924) to model new species evolution and by Furry (1937) to model particle creation. As a Markov procees, the future population size is only related to its previous state: