The importance value of Cathaya argyrophylla lists first in both gaps and no gaps, indicating that this plant is the typical gap regeneration mode species. The individuals of C. argyrophylla are contagiously distributed and many of them gather near the edges of gaps. The DBH distribution reaches to a high point when DBH >8cm or DBH <3cm and it reaches to a low point when 3< DBH <7cm. The annual height growth in latest 10 years was significantly different in gaps and under closed canopies. Young t...