Due to the pace of development, environmental destruction and the felling of trees with commercial value, the surviving large trees are often left standing in isolation, far from the mutual protection that is available among the trees of the mountain forests.
由於開發過度，環境破壞，或有經濟價值的樹被砍伐光，僅剩的大樹往往孤獨豎立，不似山上幾千、幾百棵互相庇蔭。