To investigate the forest community structure in the Mulgon Forest for Fish Shelter area Namhae-Gun Gyeongsangnam-Do, 34 plots (20m×25m) were set up with a random sampling method. Forest community by cluster analysis was classified into two groups (Zelkova serrata and Chionanthus retusa communities). There were strong positive correlations between Ulmus davidiana var.japonica and Cudrania tricuspidata, Sapindus mukurossi and Koelreuteria paniculata, Robinia pseudoacacia and Cudrania tricuspidata, Elaeagnus glabra and Lonicera maackii, Chionanthus retusa and Ulmus davidiana var.japonica, Rhamnus yoshinoi and Mallotus japonicus, while there were negative correlations between Zelkova serrata and Cudrania tricuspidata. Species diversity(H′) of the investigated area was 2.3584~2.6316.
Woody plants over 4㎝ of DBH were 15 species and 731 trees. Zelkova serrata(251 trees, 34.3%), Aphananthe aspera(189 trees, 25.9%), Chionanthus retusa(113 trees, 15.5%) and Celtis sinensis(86 trees, 11.8%) were formed 87.4% in the Mulgon Forest for Fish Shelter.
Distribution of vascular plants in the Mulgon Forest for Fish Shelter was investigated from February 10, 2006 to May 9, 2008. The results obtained from this survey were follows: There were 180 kinds, 2 forma, 18 varieties 160 species, 145 genera and 61 families of total plants. Woody vascular plants were 72 kinds, 2 forma, 5 varieties, 56 species, 45 genera and 22 families. Herbaceous species were 108 kinds, 13 varieties, 95 species, 94 genera and 39 families. The needle-leaved trees of 1 species(Pinus thunbergii), 1 genera, 1 families and broad-leaved trees of 71 kinds, 50 genera, 26 families were found. The naturalized plants of 24 species were found. Urbanization index of the investigated area was 8.9 percentage.