Trees obviously can't uproot and seek safe shelter from harm. They suffer seasonal storms; they resist but can't completely ward off all the innumerable disease attacks throughout their lifetime; insects suck and bore and crunch on their trunks and crowns. In combination with all above, the lack of or the overabundance of water and ice can complicate a tree's struggle against its environment.
The evolution of trees over millions of years fine tuned a process called compartmentalization which allows them to survive, tolerate and improve their stationary situation. This "compartmentalizing" process seals wounds and injury away from healthy tissue and gives trees the potential to enjoy the longest biologic lifespan of any plant on Earth.
Tree owners can recognize and correct many problems associated with these environmental attacks and poor growing habits. Recognizing and managing potential tree hazards can extend a tree's life and minimize damage resulting from decades of abuse and unbridled growth.