BIOA02H3 Chapter Notes - Chapter 48.2: Evapotranspiration, Transpiration, Biome

• School: UTSC
• Department: Biological Sciences
• Course: BIOA02H3
• Professor: Ivana Stehlik

Document Summary

Terrestrial biomes are recognized by their characteristic communities vegetation, which re ects evolutionary adaptation of plant form and physiology to climate. Plants open their stomata to allow co2 into leaves but lose water vapour through transpiration. Evapotranspiration sum of evaporation directly from soils and water bodies plus amount transpired by plants. In many communities, transpiration returns a lot of water vapour to atmosphere e. g. one acre of corn can transpire 3000-4000 gallons of water per day. Temp varies with latitude and altitude but so do humidity and wind. Potential evapotranspiration amount of evapotranspiration that temp, humidity, and wind would cause if water supply wasn"t limiting; re ects the demand on the water resources of an ecosystem, like precipitation represents the supply. Potential evapotranspiration ratio ratio of water demand to supply; tells us what type of vegetation can be supported in a given region.