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130 生物多样性 Biodiversity Science 第 19 卷图 2 鼎湖山常绿阔叶林 20 ha 动态监测样地内个体数大于 30 的幼苗高度分布 Fig. 2 The height structure of the species with more than 30 individuals in the 20-ha Dinghushan dynamic plot
第 2 期宾粤等 : 鼎湖山南亚热带常绿阔叶林 20 公顷样地幼苗的分布 131 表 2 8 个物种幼苗数目与 10 m 内 DBH≥1 cm 的同种个体数目 (N10)、胸高断面积之和 (B10), 及样站所在 20 m × 20 m 样方的凹凸度、坡度、坡向和海拔的回归结果。表中只列出显著的变量 , 不显著的变量和截距没有列出。 Table 2 Results of multiple linear regression analysis on the seedling abundance of eight species against the number of conspecifics within 10 m (N10), the sum of conspecific basal area within 10 m (B10), and the convexity, slope, aspect and altitude of the 20 m × 20 m quadrat in which the station is located. Only significant variables were listed in the table; those nonsignificant variables and intercepts were not listed. 物种 Species 变量 Variable 回归系数 Coefficient 标准误 SE t 值 t-value P 调整的 R 2 Adjusted R 2 柏拉木 Blastus cochinchinensis 凹凸度 Convexity –0.039 0.019 –2.002 0.047 * 0.351 谷木 Memecylon ligustrifolium 坡向 Aspect –0.004 0.002 –2.372 0.019 * 0.208 B10 –0.001 0.001 –2.09 0.038 * N10 0.151 0.03 4.981 0.000 *** 光叶山黄皮 Aidia canthioides 凹凸度 Convexity –0.344 0.09 –3.827 0.000 *** 0.166 坡向 Aspect 0.028 0.012 2.354 0.020 * B10 0.027 0.01 2.775 0.006 ** 红车 Syzygium rehderianum 坡向 Aspect 0.016 0.007 2.385 0.018 * 0.085 华润楠 Machilus chinensis 凹凸度 Convexity 0.034 0.016 2.199 0.030 * 0.212 海拔 Altitude –0.007 0.002 –3.229 0.002 ** B10 0.001 0 3.727 0.000 *** 黄果厚壳桂 Cryptocarya concinna B10 0.012 0.003 4.093 0.000 *** 0.143 罗伞树 Ardisia quinquegona 坡向 Aspect 0.004 0.002 2.142 0.034 * 0.098 N10 0.066 0.019 3.446 0.001 *** 小新木姜 Neolitsea umbrosa 海拔 Altitude 0.009 0.003 3.342 0.001 ** 0.260 * P
Page 2 and 3: 生物多样性 SHENGWU DUOYANG
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第 2 期张磊等 : 古田山
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第 2 期杨庆松等 : 浙江
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第 2 期袁志良等 : 宝天
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第 2 期刘海丰等 : 东灵
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第 2 期李亮等 : 东灵山
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第 2 期祝燕等 : 北京暖
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第 2 期王利伟等 : 长白
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湖南八大公山国家级
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