Abstract: An investigation from 2006 to 2007 was made on the Pinus koraiensis seed consumption by rodents and birds in the broadleaved P. koraiensis mixed forest and birch forest at the same altitude in Changbai Mountains. The results showed that in broadleaved P. koraiensis mixed forest, rodents consumed more pinecone seeds than birds; while in birch forest, birds did more than rodents. In the two forests, the total number of pinecone seeds consumed by rodents was significantly higher than that consumed by birds (P<0.01). In addition, rodents consumed more embedded seeds in broad-leaved P. koraiensis mixed forest than in birch forest, and the consumption amount in the two forests decreased with increasing embedded depth.

Key words: Karst peak-cluster depression, soil nutrient, soil organic carbon, litter quality, CEC.