Temperature is Also Important

Changing temperatures also influence biological cycles from one season to the next. Cold fall nights, combined with the reduced light, provoke the phenomena that cause leaves to change colours.

In the Biodôme’s Laurentian Forest, the temperature also varies with the seasons, but never drops below zero — to keep the pipes from freezing and for visitors’ comfort. The leaves at the Biodôme do not turn such vibrant colours as in the actual Laurentians, perhaps because it never gets extremely cold here and because the soil acidity is different.

We begin raising the temperature as of March 1, to cause spring to arrive earlier than in nature. We also increase the photoperiod by ten minutes a day throughout March.
Biodôme de Montréal

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