吉林蛟河针阔混交林乔木幼苗组成及其密度格局影响因素
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孟令君,姚杰,秦江环,范春雨,张春雨,赵秀海
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Drivers of composition and density pattern of tree seedlings in a secondary mixed conifer and broad-leaved forest, Jiaohe, Jilin, China
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Ling-Jun MENG,Jie YAO,Jiang-Huan QIN,Chun-Yu FAN,Chun-Yu ZHANG,Xiu-Hai ZHAO
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表3 幼苗密度模型中使用的参数
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Table 3 Parameters used in models of seedling density
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| 变量 Variables | 数据 Data | | 最小值 Min. | 最大值 Max. | 平均值 Mean | | 生物邻体变量 Biotic neighbors variables | | 同种成体胸高断面积 Conspecific adult basal area (ConBa) | 0 | 2.466 1 | 0.407 2 | | 异种成体胸高断面积 Heterospecific adult basal area (HetBa) | 1.233 | 8.151 | 3.56 | | 生境变量 Habitat variables | | | | | 林冠开阔度 Canopy openness | 0.989 | 3.982 | 2.148 | | 土壤含水量 Moisture (%) | 13 | 76.4 | 26.74 | | 土壤pH值 Soil pH value | 3.96 | 5.44 | 4.603 | | 第一主成分 The first principal component (PC1) | -3.140 6 | 4.209 1 | 0.188 2 | | 第二主成分 The second principal component (PC2) | -6.833 9 | 3.225 3 | 0.312 3 | | 第三主成分 The third principal component (PC3) | -4.091 0 | 2.157 4 | 0.176 6 |
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