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The detailed field survey data of the samples
online resourceposted on 22.11.2019 by Li Gu, Kevin O’Hara, Weizhong Li, Zhiwen Gong
Any type of resource available online.
hree plots with typical characteristics in the late stage of the natural secondary changed series were arranged, i.e., Plot I for P. tabulaeformis forests; Plot II for Pinus+Quercus mixed forests; Plot III for Q. wutaishansea forests. Each forest was sampled on both a southern slope and a northern slope (with a due east-due west line as the boundary, the slope at the southern boundary is the sunny slope and the slope at the northern boundary is the shaded slope). With a canopy density of approximately 0.8 based on the adjacent gridding method, the plot was divided into 25 20 m × 20 m small plots. In each small plot, the coordinates (x and y), diameter at breast height in 1.3m (DBH), height (h), and the crown width of adult trees (DBH >3 cm) were measured (Table 1). In addition, 5 2 × 2 m2 bush quadrats and 5 1 × 1 m2 plant quadrats (1 m × 1 m) were respectively arranged at the four corners and at the center of the subplot.