Biodiv Sci ›› 2009, Vol. 17 ›› Issue (1): 43-50. DOI: 10.3724/SP.J.1003.2009.08148
• Paper • Previous Articles Next Articles
Anjiu Zhao, Tingxing Hu*(), Xiaohong Chen
Received:
2008-06-20
Accepted:
2008-12-29
Online:
2009-01-20
Published:
2009-01-20
Contact:
Tingxing Hu
Anjiu Zhao, Tingxing Hu, Xiaohong Chen. Multiple-scale spatial analysis of community structure in a mountainous mixed evergreen-deciduous broad-leaved forest, southwest China[J]. Biodiv Sci, 2009, 17(1): 43-50.
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Table 1 Interpretation variance of the PCNM variables at fine, medium, and broad scales. Data in the table showed R2 of each spatial submodel and P-values of regression coefficients of the environmental variables in the model considered.
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Fig. 1 PCNM spatial model and sub-model of the evenness index (E). PCNM analysis of sampling sites which represents broad-scale, medium-scale, and fine-scale model of species diversity. Filled and empty bubbles represented positive and negative values, respectively.
均匀度指数 Pielou evenness index | 大尺度 Broad scale | 中尺度Medium scale | 小尺度 Fine scale | |
---|---|---|---|---|
R2 of environments | 0.674 | 0.964 | 0.575 | 0.757 |
胸径 Diameter at breast height | 0.018 | 0.023 | 0.017 | |
树高 Height | 0.038 | 0.042 | ||
冠层高 Canopy height | 0.021 | 0.007 | 0.070 | |
林分密度 Stand density | 0.011 | 0.010 | 0.0001 | 0.012 |
空隙度 GapFraction | 0.075 | 0.077 | ||
叶面积指数 Leaf area index | 0.066 | 0.098 | 0.001 | |
聚集指数 Index of clumping leaves | 0.036 | 0.100 | 0.031 | |
林下地表直接辐射 Direct radiation | 0.032 | 0.012 | 0.033 | |
有机质 Organic matters contents | 0.045 | 0.041 | 0.052 | |
开度 Openness | 0.039 | |||
冠层下散射的光通量密度 Diffuse photosynthetic photon flux density under canopy | 0.086 |
Table 2 R2 and probabilities related to the spatial analysis of environmental variables. Data in the table showed R2 of the regression of the submodel (fitted values) on a subset of forward-selected environmental variables and P-values of the regression coefficients of the environmental variables.
均匀度指数 Pielou evenness index | 大尺度 Broad scale | 中尺度Medium scale | 小尺度 Fine scale | |
---|---|---|---|---|
R2 of environments | 0.674 | 0.964 | 0.575 | 0.757 |
胸径 Diameter at breast height | 0.018 | 0.023 | 0.017 | |
树高 Height | 0.038 | 0.042 | ||
冠层高 Canopy height | 0.021 | 0.007 | 0.070 | |
林分密度 Stand density | 0.011 | 0.010 | 0.0001 | 0.012 |
空隙度 GapFraction | 0.075 | 0.077 | ||
叶面积指数 Leaf area index | 0.066 | 0.098 | 0.001 | |
聚集指数 Index of clumping leaves | 0.036 | 0.100 | 0.031 | |
林下地表直接辐射 Direct radiation | 0.032 | 0.012 | 0.033 | |
有机质 Organic matters contents | 0.045 | 0.041 | 0.052 | |
开度 Openness | 0.039 | |||
冠层下散射的光通量密度 Diffuse photosynthetic photon flux density under canopy | 0.086 |
有机质 Organic matter content | 大尺度 Broad scale | 中尺度Medium scale | 小尺度 Fine scale | |
---|---|---|---|---|
R2 of environment | 0.701 | 0.967 | 0.856 | 0.944 |
胸径 Diameter at breast height | 0.002 | 0.015 | 0.004 | 0.008 |
冠层高 Canopy height | 0.033 | 0.005 | 0.001 | 0.091 |
林分密度 Stand density | 0.003 | 0.008 | ||
生长速率 Growth ratio of BA | 0.005 | 0.017 | 0.002 | |
生物量 Biomass | 0.0001 | 0.055 | 0.006 | 0.068 |
空隙度 GapFraction | 0.010 | 0.002 | 0.018 | 0.071 |
叶面积指数 Leaf area index | 0.042 | 0.029 | 0.040 | |
聚集指数 Index of clumping leaves | 0.007 | 0.008 | 0.033 | |
林下地表直接辐射 Direct radiation | 0.001 | 0.030 | 0.004 | 0.085 |
林下地表散射 Diffuse radiation | 0.015 | 0.012 | 0.003 | |
冠层下散射的光通量密度 Diffuse photosynthetic photon flux density under canopy | 0.022 | 0.043 | ||
开度 Openness | 0.011 |
Table 3 R2 and probabilities related to the spatial analysis of environmental variables. Data in the table showed R2 of the regression of the submodel (fitted values) on a subset of forward-selected environmental variables and P-values of the regression coefficients of the environmental variables.
有机质 Organic matter content | 大尺度 Broad scale | 中尺度Medium scale | 小尺度 Fine scale | |
---|---|---|---|---|
R2 of environment | 0.701 | 0.967 | 0.856 | 0.944 |
胸径 Diameter at breast height | 0.002 | 0.015 | 0.004 | 0.008 |
冠层高 Canopy height | 0.033 | 0.005 | 0.001 | 0.091 |
林分密度 Stand density | 0.003 | 0.008 | ||
生长速率 Growth ratio of BA | 0.005 | 0.017 | 0.002 | |
生物量 Biomass | 0.0001 | 0.055 | 0.006 | 0.068 |
空隙度 GapFraction | 0.010 | 0.002 | 0.018 | 0.071 |
叶面积指数 Leaf area index | 0.042 | 0.029 | 0.040 | |
聚集指数 Index of clumping leaves | 0.007 | 0.008 | 0.033 | |
林下地表直接辐射 Direct radiation | 0.001 | 0.030 | 0.004 | 0.085 |
林下地表散射 Diffuse radiation | 0.015 | 0.012 | 0.003 | |
冠层下散射的光通量密度 Diffuse photosynthetic photon flux density under canopy | 0.022 | 0.043 | ||
开度 Openness | 0.011 |
第一组变量 First group variables | 第二组变量 Second group variables | 典型相关系数 Canonical correlation coefficients | 典型变量 Canonical variables |
---|---|---|---|
结构因子 Structure variables | 光因子 Light variables | λ1 = 0.940634 | V1 = -2.8062DBH+1.1367Height+0.5801BRHH+2.7372BA-2.3781DEN -0.1896GRBA+0.179biomass-1.6385 volume W1 = -21.68 GF+22.62Openness-0.47LAI-0.81 ClumpFact-798.89DSF-48.90ISF+ 826.07TSF-218.08PPFDDirU+19.22PPFDDifU+201.94 PPFDTU |
λ2 = 0.64406 | |||
λ3 = 0.493505 | |||
λ4 = 0.432535 | |||
结构因子 Structure variables | 空间因子(PCNM) | λ1 = 0.9998 | V1 = 2.1582 DBH+0.5098 Height-1.4834 BRHH-0.2816 BA+1.585 DEN+0.0917 biomass+0.1322 volume W1 = 0.449 PCNM1+1.525 PCNM3 +0.627 PCNM4+2.632 PCNM5-1.531 PCNM7+0.093 PCNM8+1.344 PCNM9+1.497 PCNM10+0.152 PCNM11 +0.345 PCNM12-0.121 PCNM13-1.254 PCNM14+0.988 PCNM15-1.764 PCNM18+2.150 PCNM19+0.318 PCNM21-0.253 PCNM22 +1.199 PCNM24+3.262 PCNM25 |
λ2 = 0.992 | |||
λ3 = 0.954633 | |||
λ4 = 0.940490 | |||
光因子 Light variables | 空间因子(PCNM) | λ1 = 0.999 | V1 = 25.551GF-27.189Openness-0.591LAI-0.222ClumpFac+1213.001DSF+34.911ISF -698.782TSF-756.670PPFDDirU-19.734 PPFDDifU+238.120 PPFDTU W1 = 0.1105 PCNM2+0.1245 PCNM3+0.3092 PCNM5+0.3640 PCNM6+0.2677 PCNM7+0.2772 PCNM8+0.2036 PCNM9+0.3604 PCNM10+0.2052 PCNM13-0.0062 PCNM14+0.0635 PCNM17+0.2569 PCNM19+0.1649 PCNM21+0.6269 PCNM23+0.1094 PCNM25 |
λ2 = 0.998333 | |||
λ3 = 0.968076 | |||
λ4 = 0.897069 |
Table 4 Canonical correlation analysis on community structures and canopy structures as well as relations with PCNM
第一组变量 First group variables | 第二组变量 Second group variables | 典型相关系数 Canonical correlation coefficients | 典型变量 Canonical variables |
---|---|---|---|
结构因子 Structure variables | 光因子 Light variables | λ1 = 0.940634 | V1 = -2.8062DBH+1.1367Height+0.5801BRHH+2.7372BA-2.3781DEN -0.1896GRBA+0.179biomass-1.6385 volume W1 = -21.68 GF+22.62Openness-0.47LAI-0.81 ClumpFact-798.89DSF-48.90ISF+ 826.07TSF-218.08PPFDDirU+19.22PPFDDifU+201.94 PPFDTU |
λ2 = 0.64406 | |||
λ3 = 0.493505 | |||
λ4 = 0.432535 | |||
结构因子 Structure variables | 空间因子(PCNM) | λ1 = 0.9998 | V1 = 2.1582 DBH+0.5098 Height-1.4834 BRHH-0.2816 BA+1.585 DEN+0.0917 biomass+0.1322 volume W1 = 0.449 PCNM1+1.525 PCNM3 +0.627 PCNM4+2.632 PCNM5-1.531 PCNM7+0.093 PCNM8+1.344 PCNM9+1.497 PCNM10+0.152 PCNM11 +0.345 PCNM12-0.121 PCNM13-1.254 PCNM14+0.988 PCNM15-1.764 PCNM18+2.150 PCNM19+0.318 PCNM21-0.253 PCNM22 +1.199 PCNM24+3.262 PCNM25 |
λ2 = 0.992 | |||
λ3 = 0.954633 | |||
λ4 = 0.940490 | |||
光因子 Light variables | 空间因子(PCNM) | λ1 = 0.999 | V1 = 25.551GF-27.189Openness-0.591LAI-0.222ClumpFac+1213.001DSF+34.911ISF -698.782TSF-756.670PPFDDirU-19.734 PPFDDifU+238.120 PPFDTU W1 = 0.1105 PCNM2+0.1245 PCNM3+0.3092 PCNM5+0.3640 PCNM6+0.2677 PCNM7+0.2772 PCNM8+0.2036 PCNM9+0.3604 PCNM10+0.2052 PCNM13-0.0062 PCNM14+0.0635 PCNM17+0.2569 PCNM19+0.1649 PCNM21+0.6269 PCNM23+0.1094 PCNM25 |
λ2 = 0.998333 | |||
λ3 = 0.968076 | |||
λ4 = 0.897069 |
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