The Arctic tundra lies north of the subarctic boreal forest and is located throughout the Arctic regions of the northern hemisphere (Figure 35.12). The average winter temperature is -34 °C (-34 °F) and the average summer temperature is from 3 °C–12 °C (37 °F–52 °F).
The boreal forest, also known as taiga or coniferous forest, is found south of the Arctic Circle and across most of Canada, Alaska, Russia, and northern Europe.
Evergreen trees photosynthesize earlier in the spring
Savannas are grasslands located in Africa, South America, and northern Australia (Figure 35.12). Savannas are hot, tropical areas with temperatures averaging from 24 °C–29 °C (75 °F–84 °F)
plants have evolved well-developed root systems that allow them to quickly re-sprout after a fire
this biome is very dry; in some years, evaporation exceeds precipitation. Subtropical hot deserts can have daytime soil surface temperatures above 60 °C (140 °F
deep roots, reduced foliage, and water-storing stems
The chaparral is also called the scrub forest and is found in California, along the Mediterranean Sea, and along the southern coast of Australia the annual rainfall in this biome ranges from 65 cm–75cm
plants produce seeds that only germinate after a hot fire The ashes left behind after a fire are rich in nutrients like nitrogen that fertilize the soil and promote plant regrowth