Name what determines the diversity of natural communities in different natural zones and on different continents.

In different natural zones and on different continents, there are natural communities, the diversity of which depends on environmental conditions. In warm and humid climates (tropics, subtropics) flora and fauna are much richer and more diverse than in cold climates, and the number of plants and animals is much greater. For example, a huge number of exotic plants grow in the jungle, numerous animals live, while in the Arctic, vegetation is represented mainly by mosses and lichens, and the highest flora samples are rare and do not exceed 3-5 cm in height.