Chin J Plant Ecol ›› 2009, Vol. 33 ›› Issue (4): 646-657.DOI: 10.3773/j.issn.1005-264x.2009.04.003
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MA Jiang-Ming1,2,3, LIU Shi-Rong1,*(), SHI Zuo-Min1, ZHANG Yuan-Dong1, MIAO Ning1
Received:
2008-07-20
Revised:
2009-02-05
Online:
2009-07-20
Published:
2009-07-30
Contact:
LIU Shi-Rong
MA Jiang-Ming, LIU Shi-Rong, SHI Zuo-Min, ZHANG Yuan-Dong, MIAO Ning. NATURAL REGENERATION OF ABIES FAXONIANA ALONG RESTORATION GRADIENTS OF SUBALPINE DARK CONIFEROUS FOREST IN WESTERN SICHUAN, CHINA[J]. Chin J Plant Ecol, 2009, 33(4): 646-657.
海拔 Elevation (m) | 坡向 Slope direction | 坡度 Gradient (°) | 郁闭度 Canopy density (%) | 主要树种 Dominant tree species |
---|---|---|---|---|
3 100~3 500 | N, NE, NW | 25~40 | 84 | 红桦(Betula albo-sinensis)、 野樱桃(Prunus spp.)、花楸(Sorbus spp.)、槭树(Acer spp.)、岷江冷杉(Abies faxoniana) |
3 100~3 450 | N, NW | 25~40 | 82 | 红桦、岷江冷杉、花楸(Sorbus spp.)、槭树(Acer spp.) |
3 400~3 500 | NE, N, NW | 25~40 | 79 | 岷江冷杉、紫果云杉(Picea purpurea) |
3 300~3 550 | N, NE, NW | 25~40 | 83 | 红桦、野樱桃(Prunus spp.)、花楸(Sorbus spp.)、岷江冷杉 |
3 350~3 500 | N, NW | 25~40 | 81 | 红桦、岷江冷杉、花楸(Sorbus spp.) |
3 300~3 550 | NE, N, NW | 25~40 | 78 | 岷江冷杉、紫果云杉 |
Table 1 Outline of plots in the research site
海拔 Elevation (m) | 坡向 Slope direction | 坡度 Gradient (°) | 郁闭度 Canopy density (%) | 主要树种 Dominant tree species |
---|---|---|---|---|
3 100~3 500 | N, NE, NW | 25~40 | 84 | 红桦(Betula albo-sinensis)、 野樱桃(Prunus spp.)、花楸(Sorbus spp.)、槭树(Acer spp.)、岷江冷杉(Abies faxoniana) |
3 100~3 450 | N, NW | 25~40 | 82 | 红桦、岷江冷杉、花楸(Sorbus spp.)、槭树(Acer spp.) |
3 400~3 500 | NE, N, NW | 25~40 | 79 | 岷江冷杉、紫果云杉(Picea purpurea) |
3 300~3 550 | N, NE, NW | 25~40 | 83 | 红桦、野樱桃(Prunus spp.)、花楸(Sorbus spp.)、岷江冷杉 |
3 350~3 500 | N, NW | 25~40 | 81 | 红桦、岷江冷杉、花楸(Sorbus spp.) |
3 300~3 550 | NE, N, NW | 25~40 | 78 | 岷江冷杉、紫果云杉 |
项目 Items | 幼苗 Seedlings | 幼树 Saplings | 小树 Small trees |
---|---|---|---|
恢复阶段 Restoration stages | 4 228.81** | 500.18** | 470.15** |
森林类型 Forest types | 3 054.16** | 653.76** | 670.22** |
恢复阶段×森林类型 Interaction | 2 366.74** | 7.26** | 70.59** |
Table 2 ANOVA (F value) of natural regeneration of Abies faxoniana
项目 Items | 幼苗 Seedlings | 幼树 Saplings | 小树 Small trees |
---|---|---|---|
恢复阶段 Restoration stages | 4 228.81** | 500.18** | 470.15** |
森林类型 Forest types | 3 054.16** | 653.76** | 670.22** |
恢复阶段×森林类型 Interaction | 2 366.74** | 7.26** | 70.59** |
项目 Items | X2 | X3 | X4 | X5 | X6 | Y1 | Y2 | Y3 |
---|---|---|---|---|---|---|---|---|
林分郁闭度 (X1) Canopy density (%) | -0.578 0* | 0.474 4 | ~0.459 1 | 0.540 9* | -0.554 6* | -0.501 2 | -0.552 1* | -0.476 8 |
母树密度 (X2) Density of mother tree (stems·hm-2) | -0.785 6** | 0.944 8** | -0.704 1** | 0.958 6** | 0.789 2** | 0.873 2** | 0.822 3** | |
草本层盖度 (X3) Coverage of herbage (%) | -0.787 7** | 0.657 9** | -0.679 7** | -0.871 9** | -0.885 9** | -0.811 4** | ||
倒木蓄积量 (X4) Stock of fallen wood (m3·hm-2) | -0.627 9* | 0.898 1** | 0.788 1** | 0.868 4** | 0.797 6** | |||
箭竹盖度 (X5) Coverage of bamboo (%) | -0.601 1* | -0.844 4** | -0.860 1** | -0.861 6** | ||||
苔藓层厚度 (X6) Thickness of moss (cm) | 0.625 8* | 0.752 5** | 0.687 0** |
Table 3 Correlation coefficients among factors influencing natural regeneration of bamboo-forest types and correlations between each influencing factor and the density of seedling, sapling and small tree of Abies faxoniana
项目 Items | X2 | X3 | X4 | X5 | X6 | Y1 | Y2 | Y3 |
---|---|---|---|---|---|---|---|---|
林分郁闭度 (X1) Canopy density (%) | -0.578 0* | 0.474 4 | ~0.459 1 | 0.540 9* | -0.554 6* | -0.501 2 | -0.552 1* | -0.476 8 |
母树密度 (X2) Density of mother tree (stems·hm-2) | -0.785 6** | 0.944 8** | -0.704 1** | 0.958 6** | 0.789 2** | 0.873 2** | 0.822 3** | |
草本层盖度 (X3) Coverage of herbage (%) | -0.787 7** | 0.657 9** | -0.679 7** | -0.871 9** | -0.885 9** | -0.811 4** | ||
倒木蓄积量 (X4) Stock of fallen wood (m3·hm-2) | -0.627 9* | 0.898 1** | 0.788 1** | 0.868 4** | 0.797 6** | |||
箭竹盖度 (X5) Coverage of bamboo (%) | -0.601 1* | -0.844 4** | -0.860 1** | -0.861 6** | ||||
苔藓层厚度 (X6) Thickness of moss (cm) | 0.625 8* | 0.752 5** | 0.687 0** |
项目 Items | X2 | X3 | X4 | X5 | X6 | Y1 | Y2 | Y3 |
---|---|---|---|---|---|---|---|---|
X1 | -0.632 4* | 0.511 0 | -0.546 6* | 0.510 0 | -0.538 1* | -0.509 4 | -0.544 2* | -0.570 6* |
X2 | -0.786 7** | 0.896 5** | -0.920 8** | 0.941 9** | 0.941 3** | 0.887 6** | 0.867 7** | |
X3 | -0.801 0** | 0.896 2** | -0.815 4** | -0.769 3** | -0.911 8** | -0.896 0** | ||
X4 | -0.907 2** | 0.955 1** | 0.959 6** | 0.892 7** | 0.850 9** | |||
X5 | -0.974 1** | -0.948 2** | -0.967 9** | -0.961 9** | ||||
X6 | 0.992 3** | 0.932 3** | 0.915 7** |
Table 4 Correlation coefficients among factors influencing natural regeneration of moss-forest types and correlations between each influencing factor and the density of seedling, sapling and small tree of Abies faxoniana
项目 Items | X2 | X3 | X4 | X5 | X6 | Y1 | Y2 | Y3 |
---|---|---|---|---|---|---|---|---|
X1 | -0.632 4* | 0.511 0 | -0.546 6* | 0.510 0 | -0.538 1* | -0.509 4 | -0.544 2* | -0.570 6* |
X2 | -0.786 7** | 0.896 5** | -0.920 8** | 0.941 9** | 0.941 3** | 0.887 6** | 0.867 7** | |
X3 | -0.801 0** | 0.896 2** | -0.815 4** | -0.769 3** | -0.911 8** | -0.896 0** | ||
X4 | -0.907 2** | 0.955 1** | 0.959 6** | 0.892 7** | 0.850 9** | |||
X5 | -0.974 1** | -0.948 2** | -0.967 9** | -0.961 9** | ||||
X6 | 0.992 3** | 0.932 3** | 0.915 7** |
影响因子 Influencing factors | 直接效应 Direct effect | 间接效应 Indirect effect | 小计 Total | 相关系数 Correlation coefficients | |||||
---|---|---|---|---|---|---|---|---|---|
X1→Y1 | X2→Y1 | X3→Y1 | X4→Y1 | X5→Y1 | X6→Y1 | ||||
X1 | -0.025 4 (0.000 6)a | -0.464 4 (0.023 6) | -0.157 5 (0.008 0) | -0.158 3 (0.008 0) | -0.209 3 (0.010 6) | 0.513 7 (-0.026 1) | -0.475 8 | -0.501 2 | |
X2 | 0.803 4* (0.645 5) | 0.014 7 | 0.260 8 (0.419 1) | 0.325 8 (0.523 6) | 0.272 4 (0.437 7) | -0.888 0 (-1.426 9) | -0.014 2 | 0.789 2** | |
X3 | -0.332 0 (0.110 2) | -0.012 1 | -0.631 2 | -0.271 6 (0.180 4) | -0.254 6 (0.169 0) | 0.629 6 (0.418 1) | -0.539 9 | -0.871 9** | |
X4 | 0.344 9* (0.119 0) | 0.011 7 | 0.759 1 | 0.261 5 | 0.243 0 (0.167 6) | -0.832 0 (-0.573 9) | 0.443 2 | 0.788 1** | |
X5 | -0.386 9* (0.149 7) | -0.013 8 | -0.565 7 | -0.218 4 | -0.216 5 | 0.556 9 (-0.430 9) | -0.457 5 | -0.844 4** | |
X6 | -0.926 4* (0.858 2) | 0.014 1 | 0.770 2 | 0.225 6 | 0.309 8 | 0.232 6 | 1.552 2 | 0.625 8* |
Table 5 The path analysis between each influencing factor and the density of seedling of Abies faxoniana in bamboo-forest types
影响因子 Influencing factors | 直接效应 Direct effect | 间接效应 Indirect effect | 小计 Total | 相关系数 Correlation coefficients | |||||
---|---|---|---|---|---|---|---|---|---|
X1→Y1 | X2→Y1 | X3→Y1 | X4→Y1 | X5→Y1 | X6→Y1 | ||||
X1 | -0.025 4 (0.000 6)a | -0.464 4 (0.023 6) | -0.157 5 (0.008 0) | -0.158 3 (0.008 0) | -0.209 3 (0.010 6) | 0.513 7 (-0.026 1) | -0.475 8 | -0.501 2 | |
X2 | 0.803 4* (0.645 5) | 0.014 7 | 0.260 8 (0.419 1) | 0.325 8 (0.523 6) | 0.272 4 (0.437 7) | -0.888 0 (-1.426 9) | -0.014 2 | 0.789 2** | |
X3 | -0.332 0 (0.110 2) | -0.012 1 | -0.631 2 | -0.271 6 (0.180 4) | -0.254 6 (0.169 0) | 0.629 6 (0.418 1) | -0.539 9 | -0.871 9** | |
X4 | 0.344 9* (0.119 0) | 0.011 7 | 0.759 1 | 0.261 5 | 0.243 0 (0.167 6) | -0.832 0 (-0.573 9) | 0.443 2 | 0.788 1** | |
X5 | -0.386 9* (0.149 7) | -0.013 8 | -0.565 7 | -0.218 4 | -0.216 5 | 0.556 9 (-0.430 9) | -0.457 5 | -0.844 4** | |
X6 | -0.926 4* (0.858 2) | 0.014 1 | 0.770 2 | 0.225 6 | 0.309 8 | 0.232 6 | 1.552 2 | 0.625 8* |
影响因子 Influencing factors | 直接效应 Direct effect | 间接效应 Indirect effect | 小计 Total | 相关系数 Correlation coefficients | |||||
---|---|---|---|---|---|---|---|---|---|
X1→Y2 | X2→Y2 | X3→Y2 | X4→Y2 | X5→Y2 | X6→Y2 | ||||
X1 | -0.039 3 (0.001 5) | -0.184 8 (0.014 5) | -0.137 0 (0.010 8) | -0.194 3 (0.015 3) | -0.211 3 (0.016 6) | 0.214 6 (-0.016 9) | -0.512 8 | -0.552 1* | |
X2 | 0.319 6 (0.102 2) | 0.022 7 | 0.226 9 (0.145 1) | 0.399 8 (0.255 6) | 0.275 1 (0.175 9) | -0.370 9 (-0.237 1) | 0.553 6 | 0.873 2** | |
X3 | -0.288 8 (0.083 4) | -0.018 7 | -0.251 1 | -0.333 3 (0.192 5) | -0.257 1 (0.148 5) | 0.263 0 (-0.151 9) | -0.597 1 | -0.885 9** | |
X4 | 0.423 1* (0.179 0) | 0.018 1 | 0.302 0 | 0.227 5 | 0.245 3 (0.207 6) | -0.347 5 (-0.294 1) | 0.445 3 | 0.868 4** | |
X5 | -0.390 7* (0.152 7) | -0.021 3 | -0.225 0 | -0.190 0 | -0.265 7 | 0.232 6 (-0.181 8) | -0.469 4 | -0.860 1** | |
X6 | -0.386 9 * (0.149 7) | 0.021 8 | 0.306 4 | 0.196 3 | 0.380 0 | 0.234 9 | 1.139 4 | 0.752 5** |
Table 6 The path analysis between each influencing factor and the density of sapling of Abies faxoniana in bamboo-forest types
影响因子 Influencing factors | 直接效应 Direct effect | 间接效应 Indirect effect | 小计 Total | 相关系数 Correlation coefficients | |||||
---|---|---|---|---|---|---|---|---|---|
X1→Y2 | X2→Y2 | X3→Y2 | X4→Y2 | X5→Y2 | X6→Y2 | ||||
X1 | -0.039 3 (0.001 5) | -0.184 8 (0.014 5) | -0.137 0 (0.010 8) | -0.194 3 (0.015 3) | -0.211 3 (0.016 6) | 0.214 6 (-0.016 9) | -0.512 8 | -0.552 1* | |
X2 | 0.319 6 (0.102 2) | 0.022 7 | 0.226 9 (0.145 1) | 0.399 8 (0.255 6) | 0.275 1 (0.175 9) | -0.370 9 (-0.237 1) | 0.553 6 | 0.873 2** | |
X3 | -0.288 8 (0.083 4) | -0.018 7 | -0.251 1 | -0.333 3 (0.192 5) | -0.257 1 (0.148 5) | 0.263 0 (-0.151 9) | -0.597 1 | -0.885 9** | |
X4 | 0.423 1* (0.179 0) | 0.018 1 | 0.302 0 | 0.227 5 | 0.245 3 (0.207 6) | -0.347 5 (-0.294 1) | 0.445 3 | 0.868 4** | |
X5 | -0.390 7* (0.152 7) | -0.021 3 | -0.225 0 | -0.190 0 | -0.265 7 | 0.232 6 (-0.181 8) | -0.469 4 | -0.860 1** | |
X6 | -0.386 9 * (0.149 7) | 0.021 8 | 0.306 4 | 0.196 3 | 0.380 0 | 0.234 9 | 1.139 4 | 0.752 5** |
影响因子 Influencing factors | 直接效应 Direct effect | 间接效应 Indirect effect | 小计 Total | 相关系数 Correlation coefficients | |||||
---|---|---|---|---|---|---|---|---|---|
X1→Y3 | X2→Y3 | X3→Y3 | X4→Y3 | X5→Y3 | X6→Y3 | ||||
X1 | 0.071 4 (0.005 1) | -0.507 7 (-0.072 5) | -0.075 9 (-0.010 8) | -0.083 3 (-0.011 9) | -0.250 1 (-0.035 7) | 0.368 8 (0.052 6) | -0.548 2 | -0.476 8 | |
X2 | 0.878 4* (0.771 6) | -0.041 3 | 0.125 7 (0.220 8) | 0.171 5 (0.301 3) | 0.325 5 (0.571 8) | -0.637 5 (-1.119 9) | -0.056 1 | 0.822 3** | |
X3 | -0.160 0 (0.025 6) | 0.033 9 | -0.690 1 | -0.143 0 (0.045 7) | -0.304 2 (0.097 3) | 0.452 0 (-0.144 6) | -0.651 4 | -0.811 4** | |
X4 | 0.181 5 (0.032 9) | -0.032 8 | 0.829 9 | 0.126 0 | 0.290 3 (0.105 4) | -0.597 3 (-0.216 8) | 0.616 1 | 0.797 6** | |
X5 | -0.462 3* (0.213 7) | 0.038 6 | -0.618 4 | -0.105 2 | -0.114 0 | 0.399 8 (-0.369 6) | -0.399 3 | -0.861 6** | |
X6 | -0.665 0* (0.442 2) | -0.039 6 | 0.842 0 | 0.108 7 | 0.163 0 | 0.277 9 | 1.352 0 | 0.687 0** |
Table 7 The path analysis between each influencing factor and the density of small tree of Abies faxoniana in bamboo-forest types
影响因子 Influencing factors | 直接效应 Direct effect | 间接效应 Indirect effect | 小计 Total | 相关系数 Correlation coefficients | |||||
---|---|---|---|---|---|---|---|---|---|
X1→Y3 | X2→Y3 | X3→Y3 | X4→Y3 | X5→Y3 | X6→Y3 | ||||
X1 | 0.071 4 (0.005 1) | -0.507 7 (-0.072 5) | -0.075 9 (-0.010 8) | -0.083 3 (-0.011 9) | -0.250 1 (-0.035 7) | 0.368 8 (0.052 6) | -0.548 2 | -0.476 8 | |
X2 | 0.878 4* (0.771 6) | -0.041 3 | 0.125 7 (0.220 8) | 0.171 5 (0.301 3) | 0.325 5 (0.571 8) | -0.637 5 (-1.119 9) | -0.056 1 | 0.822 3** | |
X3 | -0.160 0 (0.025 6) | 0.033 9 | -0.690 1 | -0.143 0 (0.045 7) | -0.304 2 (0.097 3) | 0.452 0 (-0.144 6) | -0.651 4 | -0.811 4** | |
X4 | 0.181 5 (0.032 9) | -0.032 8 | 0.829 9 | 0.126 0 | 0.290 3 (0.105 4) | -0.597 3 (-0.216 8) | 0.616 1 | 0.797 6** | |
X5 | -0.462 3* (0.213 7) | 0.038 6 | -0.618 4 | -0.105 2 | -0.114 0 | 0.399 8 (-0.369 6) | -0.399 3 | -0.861 6** | |
X6 | -0.665 0* (0.442 2) | -0.039 6 | 0.842 0 | 0.108 7 | 0.163 0 | 0.277 9 | 1.352 0 | 0.687 0** |
影响因子 Influencing factors | 直接效应 Direct effect | 间接效应 Indirect effect | 小计 Total | 相关系数 Correlation coefficients | |||||
---|---|---|---|---|---|---|---|---|---|
X1→Y1 | X2→Y1 | X3→Y1 | X4→Y1 | X5→Y1 | X6→Y1 | ||||
X1 | 0.067 1 (0.004 5)a | -0.095 9 (-0.012 9) | 0.021 9 (0.002 9) | -0.059 7 (-0.008 0) | 0.129 4 (0.017 4) | -0.572 2 (-0.076 8) | -0.576 5 | -0.509 4 | |
X2 | 0.151 7 (0.023 0) | -0.042 4 | -0.033 8 (-0.010 3) | 0.097 9 (0.029 7) | -0.233 7 (-0.070 9) | 1.001 6 (0.303 9) | 0.789 7 | 0.941 3** | |
X3 | 0.043 0 (0.001 8) | 0.034 3 | -0.119 4 | -0.087 5 (-0.007 5) | 0.227 4 (0.019 5) | -0.867 1 (-0.074 5) | -0.812 3 | -0.769 3** | |
X4 | 0.109 2 (0.011 9) | -0.036 7 | 0.136 0 | -0.034 4 | -0.230 2 (-0.050 3) | 1.015 7 (0.221 9) | 0.850 4 | 0.959 6** | |
X5 | 0.253 8 (0.064 4) | 0.034 2 | -0.139 7 | 0.038 5 | -0.099 1 | -1.035 9 (-0.525 7) | -1.202 0 | -0.948 2** | |
X6 | 1.063 4** (1.130 8) | -0.036 1 | 0.142 9 | -0.035 0 | 0.104 3 | -0.247 2 | -0.071 1 | 0.992 3** |
Table 8 The path analysis between each influencing factor and the density of seedling of Abies faxoniana in moss-forest types
影响因子 Influencing factors | 直接效应 Direct effect | 间接效应 Indirect effect | 小计 Total | 相关系数 Correlation coefficients | |||||
---|---|---|---|---|---|---|---|---|---|
X1→Y1 | X2→Y1 | X3→Y1 | X4→Y1 | X5→Y1 | X6→Y1 | ||||
X1 | 0.067 1 (0.004 5)a | -0.095 9 (-0.012 9) | 0.021 9 (0.002 9) | -0.059 7 (-0.008 0) | 0.129 4 (0.017 4) | -0.572 2 (-0.076 8) | -0.576 5 | -0.509 4 | |
X2 | 0.151 7 (0.023 0) | -0.042 4 | -0.033 8 (-0.010 3) | 0.097 9 (0.029 7) | -0.233 7 (-0.070 9) | 1.001 6 (0.303 9) | 0.789 7 | 0.941 3** | |
X3 | 0.043 0 (0.001 8) | 0.034 3 | -0.119 4 | -0.087 5 (-0.007 5) | 0.227 4 (0.019 5) | -0.867 1 (-0.074 5) | -0.812 3 | -0.769 3** | |
X4 | 0.109 2 (0.011 9) | -0.036 7 | 0.136 0 | -0.034 4 | -0.230 2 (-0.050 3) | 1.015 7 (0.221 9) | 0.850 4 | 0.959 6** | |
X5 | 0.253 8 (0.064 4) | 0.034 2 | -0.139 7 | 0.038 5 | -0.099 1 | -1.035 9 (-0.525 7) | -1.202 0 | -0.948 2** | |
X6 | 1.063 4** (1.130 8) | -0.036 1 | 0.142 9 | -0.035 0 | 0.104 3 | -0.247 2 | -0.071 1 | 0.992 3** |
影响因子 Influencing factors | 直接效应 Direct effect | 间接效应 Indirect effect | 小计 Total | 相关系数 Correlation coefficients | |||||
---|---|---|---|---|---|---|---|---|---|
X1→Y2 | X2→Y2 | X3→Y2 | X4→Y2 | X5→Y2 | X6→Y2 | ||||
X1 | -0.073 6 (0.005 4) | 0.019 5 (-0.002 9) | -0.011 0 (0.001 6) | -0.182 6 (0.026 9) | -0.662 4 (0.097 5) | 0.365 8 (-0.053 8) | -0.470 6 | -0.544 2* | |
X2 | -0.030 9 (0.001 0) | 0.046 5 | 0.016 9 (-0.001 0) | 0.299 4 (-0.018 5) | 1.195 9 (-0.073 9) | -0.640 3 (0.039 6) | 0.918 5 | 0.887 6** | |
X3 | -0.021 5 (0.000 5) | -0.037 6 | 0.024 3 | -0.267 5 (0.011 5) | -1.164 0 (0.050 1) | 0.554 3 (-0.023 8) | -0.890 5 | -0.911 8** | |
X4 | 0.334 0 (0.111 6) | 0.040 2 | -0.027 7 | 0.017 2 | 1.178 3 (0.787 1) | -0.649 3 (-0.433 7) | 0.558 7 | 0.892 7** | |
X5 | -1.298 8** (1.686 9) | -0.037 5 | 0.028 5 | -0.019 3 | -0.303 0 | 0.662 2 (-1.720 1) | 0.330 8 | -0.967 9** | |
X6 | -0.679 8* (0.462 1) | 0.039 6 | -0.029 1 | 0.017 5 | 0.319 0 | 1.265 2 | 1.612 2 | 0.932 3** |
Table 9 The path analysis between each influencing factor and the density of sapling of Abies faxoniana in moss-forest types
影响因子 Influencing factors | 直接效应 Direct effect | 间接效应 Indirect effect | 小计 Total | 相关系数 Correlation coefficients | |||||
---|---|---|---|---|---|---|---|---|---|
X1→Y2 | X2→Y2 | X3→Y2 | X4→Y2 | X5→Y2 | X6→Y2 | ||||
X1 | -0.073 6 (0.005 4) | 0.019 5 (-0.002 9) | -0.011 0 (0.001 6) | -0.182 6 (0.026 9) | -0.662 4 (0.097 5) | 0.365 8 (-0.053 8) | -0.470 6 | -0.544 2* | |
X2 | -0.030 9 (0.001 0) | 0.046 5 | 0.016 9 (-0.001 0) | 0.299 4 (-0.018 5) | 1.195 9 (-0.073 9) | -0.640 3 (0.039 6) | 0.918 5 | 0.887 6** | |
X3 | -0.021 5 (0.000 5) | -0.037 6 | 0.024 3 | -0.267 5 (0.011 5) | -1.164 0 (0.050 1) | 0.554 3 (-0.023 8) | -0.890 5 | -0.911 8** | |
X4 | 0.334 0 (0.111 6) | 0.040 2 | -0.027 7 | 0.017 2 | 1.178 3 (0.787 1) | -0.649 3 (-0.433 7) | 0.558 7 | 0.892 7** | |
X5 | -1.298 8** (1.686 9) | -0.037 5 | 0.028 5 | -0.019 3 | -0.303 0 | 0.662 2 (-1.720 1) | 0.330 8 | -0.967 9** | |
X6 | -0.679 8* (0.462 1) | 0.039 6 | -0.029 1 | 0.017 5 | 0.319 0 | 1.265 2 | 1.612 2 | 0.932 3** |
影响因子 Influencing factors | 直接效应 Direct effect | 间接效应 Indirect effect | 小计 Total | 相关系数 Correlation coefficients | |||||
---|---|---|---|---|---|---|---|---|---|
X1→Y3 | X2→Y3 | X3→Y3 | X4→Y3 | X5→Y3 | X6→Y3 | ||||
X1 | -0.182 0 (0.033 1) | 0.116 6 (-0.042 4) | 0.059 9 (-0.021 8) | -0.076 8 (0.028 0) | -0.879 8 (0.320 2) | 0.391 5 (-0.142 5) | -0.388 6 | -0.570 6* | |
X2 | -0.184 3 (0.034 0) | 0.115 1 | -0.092 2 (0.034 0) | 0.126 0 (-0.046 4) | 1.588 5 (0.585 5) | -0.685 3 (0.252 6) | 1.052 0 | 0.867 7** | |
X3 | 0.117 2 (0.013 7) | -0.093 0 | 0.145 0 | -0.112 5 (-0.026 4) | -1.546 0 (-0.362 4) | 0.593 3 (0.139 1) | -1.013 3 | -0.896 0** | |
X4 | 0.140 5 (0.019 7) | 0.099 5 | -0.165 2 | -0.093 9 | 1.565 0 (0.439 8) | -0.694 9 (-0.195 3) | 0.710 5 | 0.850 9** | |
X5 | -1.725 1** (2.976 0) | -0.092 8 | 0.169 7 | 0.105 0 | -0.127 5 | 0.708 7 (-2.445 3) | 0.763 2 | -0.961 9** | |
X6 | -0.727 6* (0.529 4) | 0.097 9 | -0.173 6 | -0.095 6 | 0.134 2 | 1.680 4 | 1.643 4 | 0.915 7** |
Table 10 The path analysis between each influencing factor and density of small tree of Abies faxoniana in moss-forest types
影响因子 Influencing factors | 直接效应 Direct effect | 间接效应 Indirect effect | 小计 Total | 相关系数 Correlation coefficients | |||||
---|---|---|---|---|---|---|---|---|---|
X1→Y3 | X2→Y3 | X3→Y3 | X4→Y3 | X5→Y3 | X6→Y3 | ||||
X1 | -0.182 0 (0.033 1) | 0.116 6 (-0.042 4) | 0.059 9 (-0.021 8) | -0.076 8 (0.028 0) | -0.879 8 (0.320 2) | 0.391 5 (-0.142 5) | -0.388 6 | -0.570 6* | |
X2 | -0.184 3 (0.034 0) | 0.115 1 | -0.092 2 (0.034 0) | 0.126 0 (-0.046 4) | 1.588 5 (0.585 5) | -0.685 3 (0.252 6) | 1.052 0 | 0.867 7** | |
X3 | 0.117 2 (0.013 7) | -0.093 0 | 0.145 0 | -0.112 5 (-0.026 4) | -1.546 0 (-0.362 4) | 0.593 3 (0.139 1) | -1.013 3 | -0.896 0** | |
X4 | 0.140 5 (0.019 7) | 0.099 5 | -0.165 2 | -0.093 9 | 1.565 0 (0.439 8) | -0.694 9 (-0.195 3) | 0.710 5 | 0.850 9** | |
X5 | -1.725 1** (2.976 0) | -0.092 8 | 0.169 7 | 0.105 0 | -0.127 5 | 0.708 7 (-2.445 3) | 0.763 2 | -0.961 9** | |
X6 | -0.727 6* (0.529 4) | 0.097 9 | -0.173 6 | -0.095 6 | 0.134 2 | 1.680 4 | 1.643 4 | 0.915 7** |
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