Table 2. Seasonal crown density of study species for three years from 2018 to 2020

Species Crown density(%)
Spring (Apr.-May) Summer (June-Aug.) Autumn (Sept.-Oct.) Winter (Nov.-Mar.)
Abies holophylla 91.3±1.8 92.1±1.2 92.3±3.8 91.5±0.9
Acer palmatum 72.1±1.1 79.3±1.2 80.4±0.6 60.4±2.6
Ginkgo biloba 72.6±1.9 91.9±2.5 88.5±0.4 50.7±6.1
Pinus densiflora 74.6±1.0 75.7±0.8 74.9±0.5 74.0±3.2
Pinus koraiensis 93.4±0.3 95.4±1.8 92.2±1.1 93.2±1.8
Prunus yedoensis 67.6±0.7 72.4±2.0 76.5±0.5 56.6±2.5
Zelkova serrata 81.8±0.3 95.6±0.2 93.0±0.2 67.3±0.7