Up until 7855.349 generations ago, the population of B deme was constant at 9639. It then entered a linear phase of change until 7171.0 generations, reaching size 8116. This was succeeded by an exponential phase of change, leading to 9947 by 1449.398. From 1449.398 generations to present, the population has changed from 9947 to 837 exponentially.
time_units: generations
demes:
  - name: B
    start_time: .inf
    epochs:
      - start_size: 9639
        end_time: 7855.349
      - start_size: 9639
        end_size: 8116
        end_time: 7171.0
        size_function: linear
      - start_size: 8116
        end_time: 1449.398
        end_size: 9947
        size_function: exponential
      - end_time: 0
        start_size: 9947
        end_size: 837
        size_function: exponential