<P> The tree line is the edge of the habitat at which trees are capable of growing . It is found at high elevations and in frigid environments . Beyond the tree line , trees can not tolerate the environmental conditions ( usually cold temperatures or lack of moisture ) . The tree line should not be confused with a lower timberline or forest line , which is the line where trees form a forest with a closed canopy . </P>
<P> The tree line is the edge of the habitat at which trees are capable of growing . It is found at high elevations and in frigid environments . Beyond the tree line , trees can not tolerate the environmental conditions ( usually cold temperatures or lack of moisture ) . The tree line should not be confused with a lower timberline or forest line , which is the line where trees form a forest with a closed canopy . </P>
why do trees stop growing at a certain elevation
why do trees stop growing at a certain elevation
can not tolerate the environmental conditions ( usually cold temperatures or lack of moisture )
can not tolerate the environmental conditions ( usually cold temperatures or lack of moisture )