When water is being transported from the roots to the leaves of a plant or tree, water vapor eventually escapes through air spaces in the plant or tree. more water travels up to replace the lost water due, in part, to the of water.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs