The relationship between species diversity and altitudinal gradient for evergreen broad-leaved forests in Simian mountain, Chongqing of China was studied by the combination of DCCA ordination and altitude ordination.

• 采用DCCA排序和海拔高度排序相结合的方法；对四面山常绿阔叶林群落物种多样性和海拔高度的关系进行了研究.