Chin J Plan Ecolo ›› 2015, Vol. 39 ›› Issue (7): 726-735.DOI: 10.17521/cjpe.2015.0069
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CHEN Yong-Gang1,2,*(), TANG Meng-Ping1,2, YANG Chun-Ju1,2, MA Tian-Wu1,2, WANG Li3
Online:
2015-07-01
Published:
2015-07-22
Contact:
Yong-Gang CHEN
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# Co-first authors
CHEN Yong-Gang,TANG Meng-Ping,YANG Chun-Ju,MA Tian-Wu,WANG Li. Spatial analysis of competition in natural Phyllostachys edulis community[J]. Chin J Plan Ecolo, 2015, 39(7): 726-735.
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径级 Diameter class (cm) | 株数 Number | 百分比 Percentage (%) | 平均值 Average | 中位数 Median | 最大值 Maximum value | 最小值 Minimum value |
---|---|---|---|---|---|---|
2-4 | 2 | 0.04 | 14.23 | 14.23 | 17.13 | 11.34 |
4-6 | 8 | 0.15 | 10.29 | 8.39 | 23.84 | 5.53 |
6-8 | 197 | 3.69 | 8.340 | 7.71 | 29.08 | 2.71 |
8-10 | 1 277 | 23.95 | 6.93 | 6.27 | 43.06 | 2.34 |
10-12 | 2 616 | 49.06 | 5.89 | 5.35 | 40.20 | 2.11 |
12-14 | 1 123 | 21.06 | 5.39 | 4.97 | 24.68 | 1.88 |
14-16 | 107 | 2.01 | 4.51 | 4.31 | 8.13 | 1.34 |
16-18 | 0 | 0 | 0 | 0 | 0 | 0 |
18-20 | 0 | 0 | 0 | 0 | 0 | 0 |
20-22 | 2 | 0.04 | 2.76 | 2.76 | 3.62 | 1.90 |
Table 1 The V_Hegyi competition index of natural Phyllostachys edulis
径级 Diameter class (cm) | 株数 Number | 百分比 Percentage (%) | 平均值 Average | 中位数 Median | 最大值 Maximum value | 最小值 Minimum value |
---|---|---|---|---|---|---|
2-4 | 2 | 0.04 | 14.23 | 14.23 | 17.13 | 11.34 |
4-6 | 8 | 0.15 | 10.29 | 8.39 | 23.84 | 5.53 |
6-8 | 197 | 3.69 | 8.340 | 7.71 | 29.08 | 2.71 |
8-10 | 1 277 | 23.95 | 6.93 | 6.27 | 43.06 | 2.34 |
10-12 | 2 616 | 49.06 | 5.89 | 5.35 | 40.20 | 2.11 |
12-14 | 1 123 | 21.06 | 5.39 | 4.97 | 24.68 | 1.88 |
14-16 | 107 | 2.01 | 4.51 | 4.31 | 8.13 | 1.34 |
16-18 | 0 | 0 | 0 | 0 | 0 | 0 |
18-20 | 0 | 0 | 0 | 0 | 0 | 0 |
20-22 | 2 | 0.04 | 2.76 | 2.76 | 3.62 | 1.90 |
方法 Method | 参数 Parameter | 数值 Value |
---|---|---|
Getis-Ord General G | 指标值 Index value | 0.001 351 |
方差 Variance | 0.000 000 | |
Z值 Z value | 51.894 764 | |
概率p Probability | 0.000 000 | |
Moran’s I | 指标值 Index value | 0.332 195 |
方差 Variance | 0.000 041 | |
Z值 Z value | 51.894 764 | |
概率p Probability | 0.000 000 |
Table 2 Spatial autocorrelation and significance test of V_Hegyi index of Phyllostachys edulis community
方法 Method | 参数 Parameter | 数值 Value |
---|---|---|
Getis-Ord General G | 指标值 Index value | 0.001 351 |
方差 Variance | 0.000 000 | |
Z值 Z value | 51.894 764 | |
概率p Probability | 0.000 000 | |
Moran’s I | 指标值 Index value | 0.332 195 |
方差 Variance | 0.000 041 | |
Z值 Z value | 51.894 764 | |
概率p Probability | 0.000 000 |
竞争强度 Competition intensity | 株数 Plant number | 面积 Area (m2) | 密度 Density (ind.·m-2) |
---|---|---|---|
低 Low | 1 117 | 4 218.909 | 0.265 |
中 Medium | 2 618 | 4 268.221 | 0.613 |
高 High | 1 681 | 1 512.870 | 1.111 |
Table 3 The spatial distribution density of natural Phyllostachys edulis community in various areas with different competition intensity
竞争强度 Competition intensity | 株数 Plant number | 面积 Area (m2) | 密度 Density (ind.·m-2) |
---|---|---|---|
低 Low | 1 117 | 4 218.909 | 0.265 |
中 Medium | 2 618 | 4 268.221 | 0.613 |
高 High | 1 681 | 1 512.870 | 1.111 |
竞争强度 Competition intensity | 平均值 Average (a) | 对比 Comparison | t统计量 t statistic | 概率 Probability |
---|---|---|---|---|
低 Low | 7.11 | 低-中 Low-medium | -3.88 | 0.000 |
中 Medium | 7.62 | 中-高 Medium-high | -0.95 | 0.341 |
高 High | 7.72 | 低-高 Low-high | -4.33 | 0.000 |
Table 4 The 2-samples t test of natural Phyllostachys edulis community age distribution in areas with different natural P. edulis competition intensities
竞争强度 Competition intensity | 平均值 Average (a) | 对比 Comparison | t统计量 t statistic | 概率 Probability |
---|---|---|---|---|
低 Low | 7.11 | 低-中 Low-medium | -3.88 | 0.000 |
中 Medium | 7.62 | 中-高 Medium-high | -0.95 | 0.341 |
高 High | 7.72 | 低-高 Low-high | -4.33 | 0.000 |
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