海南苏铁种群结构与森林群落郁闭度的关系
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吴二焕, 李东海, 杨小波, 左永令, 李龙, 张培春, 陈琳, 田路嘉, 李晨笛
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Population structure of Cycas hainanensis and its relationship with forest canopy density
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Erhuan Wu, Donghai Li, Xiaobo Yang, Yongling Zuo, Long Li, Peichun Zhang, Lin Chen, Lujia Tian, Chendi Li
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表4 海南省保梅岭省级自然保护区海南苏铁种群空间分布格局。样方A、B、C、D、E、F详细信息见表1。
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Table 4 Spatial distribution pattern of Cycas hainanensis population in the Baomeiling Provincial Nature Reserve of Changjiang County, Hainan Province. Details of quadrat A, B, C, D, E, F see Table 1.
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样方 Quadrat | 郁闭度Forest canopy density | 方差Variance | 方差均值比 Average variance ratio (DI) | t
| 负二项参数Negative binomial parameters (k) | 丛生指数Cluster index (I) | 平均拥挤指数Average crowding index (m*) | 聚集指数Patchiness index (Pai) | 扩散型指数Type diffusion index (I&) | 格林指数Green index (GI) | Cassie 指标 Cassie index(CA) | A | 0.64 | 31.12 | 3.58 | 5.48 | 4.62 | 2.58 | 11.28 | 1.30 | 1.27 | 2.38 | 0.22 | B | 0.51 | 192.1 | 16.14 | 32.2 | 1.75 | 15.14 | 27.04 | 2.27 | 2.15 | 19.9 | 0.57 | C | 0.47 | 11.38 | 1.78 | 1.65 | 10.29 | 0.78 | 7.18 | 1.12 | 1.30 | 0.44 | 0.10 | D | 0.29 | 134.7 | 26.38 | 11.5 | 5.10 | 15.38 | 26.48 | 1.26 | 1.23 | 12.5 | 0.20 | E | 0.59 | 17.43 | 2.53 | 3.25 | 6.01 | 1.53 | 8.43 | 1.22 | 1.20 | 1.06 | 0.17 | F | 0.59 | 311.8 | 11.55 | 22.4 | 3.55 | 10.55 | 37.57 | 1.40 | 1.35 | 31.5 | 0.28 |
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