Biodiversity Science ›› 2019, Vol. 27 ›› Issue (4): 439-448.doi: 10.17520/biods.2018326

• Data Paper • Previous Article     Next Article

Species composition and community characteristics of a 25 ha forest dynamics plot in deciduous broad-leaved forest, Qinling Mountains, north-central China

Xie Fenglin1, 3, Zhou Quan2, 3, Shi Hang2, 3, Shu Xiao2, Zhang Kerong2, Li Tao4, Feng Shuiyuan4, Zhang Quanfa2, Dang Haishan2, *()   

  1. 1 College of Science, Tibet University, Lhasa 850000
    2 Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074
    3 University of Chinese Academy of Sciences, Beijing 100049
    4 Shaanxi Foping National Nature Reserve Administration Bureau, Foping, Shaanxi 723400
  • Received:2018-12-11 Accepted:2019-02-19 Online:2019-06-05
  • Dang Haishan

The deciduous broad-leaved forests in the warm temperate-subtropical transition zone of the Qinling Mountains are well preserved. The forests lie in the transition zone from warm temperate to subtropical forests and have a relatively complex community structure. Few studies have been conducted to investigate community structure based on a large-sized plot in this transitional region. This study analyzed species composition and community characteristics within a 25 ha plot, serving as the baseline information for monitoring long-term forest dynamics and diversity in the future. Based on the field protocol of the Center for Tropical Forest Science (CTFS) and the Chinese Forest Biodiversity Monitoring Network (CForBio), a 25 ha deciduous broad-leaved forest plot was established in the temperate-subtropical transition zone. All free standing trees with diameter at breast height (DBH) ≥ 1 cm were tagged, measured and identified to species. A total of 47,739 woody individuals with DBH ≥ 1 cm belonging to 119 species, 66 genera and 36 families were identified. The families and genera of temperate floristic elements accounted for 41.18% and 60.00%, respectively and were the dominant flora in this plot. Fifty-one rare species accounted for 42.86% of the total individuals. Deciduous trees species were dominant accounting for 89.07% of the total species. The 20 species with importance values ≥ 1 contributed 70.35% and 57.41% to the total number of individuals and the total basal area, respectively. The three most abundant species were Quercus aliena var. acutiserrata in the canopy layer, Sorbus alnifolia in the sub-tree layer, and Quercus spinosa in the shrub layer. The mean DBH of all individuals in the plot was 8.61 cm, and the overall structure of DBH size class of all individuals generally shows an inverse “J” type which indicated successful regeneration. All the dominant species exhibited large-scale aggregated spatial distribution closely related to habitat preferences except for Populus purdomii.

Key words: deciduous broad-leaved forest, Qinling Mountains, temperate-subtropical transition zone, species composition, community structure

Table 1

Comparison of the major characteristics among Qinling 25 ha forest dynamics plot and other six different latitudes and vegetation types plots"

Area (ha)
floristic elements of family
floristic elements of genus
No. of
No. of individuals
No. of rare species (%)
No. of deciduous tree
species (%)
25 107.84° E,
33.68° N
1,773.49 41.18%/38.24% 60%/24.62% 119 47,739 51 (42.86) 106 (89.07) 本研究
This study
25 128.08° E,
42.38° N
801.5 - - 52 38,902 18 (34.6) - Hao et al,
20 115.43° E,
39.96° N
1,395 44.44%/22.22% 93.75%/3.13% 58 52,136 11 (18.97) 58 (100) Liu et al,
25 111.94° E,
33.49° N
1,301 - - > 98 63,600 - - -
24 118.12° E,
29.25° N
580.6 26.53%/48.98% 42.31%/50.96% 159 140,700 59 (37.1) 68 (42.8) Zhu et al,
20 121.32° E,
23.10° N
230-247 - 6.72%/89.92% 210 71,617 110 (52.38) - Ye et al,
20 101.03° E,
24.53° N
2,550 - 38.10%/46.00% 104 44,168 49 (47.1) 23 (22.8) Wen et al,

Fig. 1

Species-area curve for woody plants in Qinling 25 ha forest dynamics plot"

Fig. 2

Size-class distribution for overall woody plant species in Qinling 25 ha forest dynamics plot"

Fig. 3

DBH size-class distribution for dominant species in Qinling 25 ha forest dynamics plot"

Fig. 4

Spatial distribution pattern under complete spatial randomness null model of eight dominant species in Qinling 25 ha forest dynamics plot"

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