When the solar flux on Daisyworld is so small that the world temperature is less
than 25
C, dark daisies flourish. Only when solar luminosity declines significantly
can the daisies not survive.
Dark daisies, because they are dark, absorb more light than either the bare
ground or light daisies, so they are warmer under the same solar flux conditions
and can grow when it is too cool for light daisies. As the dark daisy population
increases, the world temperature increases, and soon it is warm enough for light
daisies. But the solar luminosity is increasing at the same time, so now Daisyworld
Fig. 44.7
Fig. 44.8
418
44 Daisyworld