Published Online: Jun 30, 2015
The forest vegetation of Mt. Inwang was surveyed from August to October 2014. The vegetation of Mt. Inwang classified into 12 main communities according to the phisiognomic dominant species: P. densiflora commintity, P. densiflora-Prunus sargentii commintity, P. densiflora-Quercus mongolica commintity, P. densiflora-R. pseudoacacia commintity, Q. acutissima commintity, Q. acutissima- P. densiflora commintity, Q. acutissima-R. pseudoacacia commintity, Quercus variabilis commintity, Robinia pseudoacacia commintity, R. pseudoacacia-Pinus. densiflora commintity, R. pseudoacacia- Quercus acutissima commintity, R. pseudoacacia-Quercus serrata commintity. In addition, we identified the P. densiflora commintity distributed around the mountain top rocky ridge area, and R. pseudoacacia community is bordered on the inhabitant in the foot of mountain. P. densiflora-P. sargentii commintity showed higher species diversity than other communities. The degree of green naturality (DGN) 7 occupied 46.8% and DGN 6 occupied 40.6% of Mt. Inwang area. The coverage of herb layer of plant community was poor of 10%, shrub layer was 30~40%, and tree layer was 80% in all plant communities. However the coverage of sub-tree layer was very thin in pine tree communities. The frequency distribution in DBH-class of P. densiflora in the P. densiflora community showed scarce distribution of small diameter trees, and was opposed to the R. pseudoacacia that had large individuals of small diameter in the R. pseudoacacia community. The net primary productivity (NPP) was assumed as 1,504.42 g/m2/yr(use temp.) by Miami model, and 1,483.99 g/m2/yr by Montreal model, respectively.