The bonsai trees are ‘normal’ trees growing under the influence of the Bonsai techniques.
Bonsai is not a specific species but rather an exemplar morphologically conditioned by the environment (in this case the techniques of bonsai).
Thus, based on the genetics of species that grow freely, require the same conditions for which its kind is prepared.
For example, a pine likes a lot of sun, then a pine bonsai will enjoy plenty of sunshine, the Ficus are tropical, so a Ficus bonsai will like heat and humidity.