Abstract: A variety of methods has been used to analyse the distribution pattern type, aggregative intensity, pattern scale and dynamics of dominant tree populations in Carpinus pubescenscommunity in Qianling Mountain.The results indicate that most of populations show an aggregated distribution in their dispersal and developmental stages, and tend to be randomly distributed during their maturing and degenerative stages. The aggregated intensity and pattern scale vary among different populations in a community and among same population in different communities.

Key words: Oreochromis niloticus, juvenile, growth, antioxidant enzyme, response surface