Biodiv Sci ›› 2020, Vol. 28 ›› Issue (3): 289-295.DOI: 10.17520/biods.2019143
• Original Papers • Previous Articles Next Articles
Xinghui Lu1,Runguo Zang2,3,*(),Yi Ding2,3,Jihong Huang2,3,Yue Xu2,3
Received:
2019-04-26
Accepted:
2019-09-01
Online:
2020-03-20
Published:
2019-12-24
Contact:
Runguo Zang
Xinghui Lu, Runguo Zang, Yi Ding, Jihong Huang, Yue Xu. Habitat characteristics and its effects on seedling abundance of Hopea hainanensis, a Wild Plant with Extremely Small Populations[J]. Biodiv Sci, 2020, 28(3): 289-295.
Fig. 1 Diagram for the survey quadrats of Hopea hainanensis, a Wild Plant with Extremely Small Populations. The black dot in the center is the mother tree of Hopea hainanensis.
生境因子 Habitat factors | 中位数 ± 标准差 Median ± SD | 变化范围 Range |
---|---|---|
海拔 Elevation (m) | 560.9 ± 173.67 | 260-940 |
坡度 Slope (°) | 15.00 ± 10.55 | 0-40 |
土壤含水量 Soil water content (%) | 12.23 ± 7.08 | 3.60-47.10 |
土壤pH值 Soil pH value | 4.78 ± 0.57 | 3.80-5.98 |
土壤有机质 Soil organic matter (g/kg) | 3.75 ± 1.58 | 0.13-7.93 |
土壤全氮 Soil total nitrogen (g/kg) | 1.38 ± 0.57 | 0.30-2.49 |
土壤全磷 Soil total phosphorus (g/kg) | 0.17 ± 0.05 | 0.09-0.34 |
土壤有效氮 Soil available nitrogen (mg/kg) | 86.8 ± 28.03 | 15.06-140.77 |
土壤有效磷 Soil available phosphorus (mg/kg) | 15.16 ± 7.09 | 5.74-34.26 |
土壤有效钾 Soil available potassium (mg/kg) | 147.88 ± 57.50 | 47.16-296.36 |
冠层开阔度 Canopy openness (%) | 6.94 ± 3.27 | 2.01-19.49 |
伴生种胸高断面积 Basal area of companion species (cm2) | 1,017.36 ± 996.31 | 226.86-3,990.67 |
伴生种树高 Height of companion species (m) | 23 ± 4.81 | 10.00-33.00 |
母株冠幅 Crown of mother tree (m) | 3.63 ± 1.05 | 1.50-6.50 |
母株胸径 DBH of mother tree (cm) | 20.94 ± 3.60 | 14.91-33.61 |
母株高度 Height of mother tree (m) | 13.51 ± 1.62 | 11.00-14.00 |
Table 1 Habitat characteristics of Hopea hainanensis, a Wild Plant with Extremely Small Populations
生境因子 Habitat factors | 中位数 ± 标准差 Median ± SD | 变化范围 Range |
---|---|---|
海拔 Elevation (m) | 560.9 ± 173.67 | 260-940 |
坡度 Slope (°) | 15.00 ± 10.55 | 0-40 |
土壤含水量 Soil water content (%) | 12.23 ± 7.08 | 3.60-47.10 |
土壤pH值 Soil pH value | 4.78 ± 0.57 | 3.80-5.98 |
土壤有机质 Soil organic matter (g/kg) | 3.75 ± 1.58 | 0.13-7.93 |
土壤全氮 Soil total nitrogen (g/kg) | 1.38 ± 0.57 | 0.30-2.49 |
土壤全磷 Soil total phosphorus (g/kg) | 0.17 ± 0.05 | 0.09-0.34 |
土壤有效氮 Soil available nitrogen (mg/kg) | 86.8 ± 28.03 | 15.06-140.77 |
土壤有效磷 Soil available phosphorus (mg/kg) | 15.16 ± 7.09 | 5.74-34.26 |
土壤有效钾 Soil available potassium (mg/kg) | 147.88 ± 57.50 | 47.16-296.36 |
冠层开阔度 Canopy openness (%) | 6.94 ± 3.27 | 2.01-19.49 |
伴生种胸高断面积 Basal area of companion species (cm2) | 1,017.36 ± 996.31 | 226.86-3,990.67 |
伴生种树高 Height of companion species (m) | 23 ± 4.81 | 10.00-33.00 |
母株冠幅 Crown of mother tree (m) | 3.63 ± 1.05 | 1.50-6.50 |
母株胸径 DBH of mother tree (cm) | 20.94 ± 3.60 | 14.91-33.61 |
母株高度 Height of mother tree (m) | 13.51 ± 1.62 | 11.00-14.00 |
Fig. 3 Principal component analysis of habitat factors of Hopea hainanensi, a Wild Plant with Extremely Small Populations. ELE, Elevation; SWC, Soil water content; pH, Soil pH value; TP, Soil total phosphorus; AP, Soil available phosphorus; AK, Soil available potassium; CO, Canopy openness; BA, Basal area of companion species; Crown, Crown of mother tree; MDBH, DBH of mother tree; MH, Height of mother tree.
生境因子 Habitat factors | PCA1 | PCA2 |
---|---|---|
海拔 Elevation | 0.21 | -0.03 |
坡度 Slope | 1.42 | -0.03 |
土壤含水量 Soil water content | -0.48 | 0.11 |
土壤pH值 Soil pH value | 0.08 | -0.02 |
土壤全磷 Soil total phosphorus | -0.12 | 0.00 |
土壤有效磷 Soil available phosphorus | -0.38 | -0.00 |
土壤有效钾 Soil available potassium | 0.05 | 0.12 |
冠层开阔度 Canopy openness | 0.02 | -0.11 |
伴生种胸高断面积 Basal area of companion species | 0.12 | 1.05 |
母株冠幅 Crown of mother tree | -0.06 | 0.20 |
母株胸径 DBH of mother tree | -0.08 | 0.17 |
母株高度 Height of mother tree | -0.03 | 0.04 |
特征值 Eigenvalue | 0.232 | 0.110 |
方差比例 Proportion of variance | 0.467 | 0.238 |
累积方差比例 Proportion of cumulative variance | 0.467 | 0.705 |
Table 2 The loadings and explained variance of environmental variables in the first two axes in principal component anlysis (PCA)
生境因子 Habitat factors | PCA1 | PCA2 |
---|---|---|
海拔 Elevation | 0.21 | -0.03 |
坡度 Slope | 1.42 | -0.03 |
土壤含水量 Soil water content | -0.48 | 0.11 |
土壤pH值 Soil pH value | 0.08 | -0.02 |
土壤全磷 Soil total phosphorus | -0.12 | 0.00 |
土壤有效磷 Soil available phosphorus | -0.38 | -0.00 |
土壤有效钾 Soil available potassium | 0.05 | 0.12 |
冠层开阔度 Canopy openness | 0.02 | -0.11 |
伴生种胸高断面积 Basal area of companion species | 0.12 | 1.05 |
母株冠幅 Crown of mother tree | -0.06 | 0.20 |
母株胸径 DBH of mother tree | -0.08 | 0.17 |
母株高度 Height of mother tree | -0.03 | 0.04 |
特征值 Eigenvalue | 0.232 | 0.110 |
方差比例 Proportion of variance | 0.467 | 0.238 |
累积方差比例 Proportion of cumulative variance | 0.467 | 0.705 |
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