极小种群植物猪血木的种群现状及保护对策

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极小种群植物猪血木的种群现状及保护对策

魏雪莹¹, 叶育石¹, 林喜珀², 崔煜文¹, 曾飞燕¹, 王发国¹^,^*(

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Population status and conservation of an extremely small population species Euryodendron excelsum

WEI Xue-Ying¹, YE Yu-Shi¹, LIN Xi-Po², CUI Yu-Wen¹, ZENG Fei-Yan¹, WANG Fa-Guo¹^,^*(

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图3. 猪血木种群高度(H)和胸径(DBH)级结构。
S_t, 野生猪血木种群(包括三甲镇和八甲镇); S_a, 八甲镇野生猪血木种群; S_s, 三甲镇野生猪血木种群。I, 幼苗1级, 0 < H ≤ 100.0 cm; II, 幼苗2级, H > 100.0 cm, DBH < 3.0 cm; III, 幼树, 3.0 cm ≤ DBH < 9.0 cm; IV, 小树1级, 9.0 cm ≤ DBH < 15.0 cm; V, 小树2级, 15.0 cm ≤ DBH < 21.0 cm; VI, 中龄树1级, 21.0 cm ≤ DBH < 27.0 cm; VII, 中龄树2级, 27.0 cm ≤ DBH < 33.0 cm; VIII, 成年树1级, 33.0 cm ≤ DBH < 39.0 cm; IX, 成年树2级, 39.0 cm ≤ DBH < 45.0 cm; X, 大树, DBH ≥ 45.0 cm。

Fig. 3. Height (H) and diameter at breast height (DBH) class of Euryodendron excelsum population.
S_t, wild E. excelsum population (including Sanjia Town and Bajia Town); S_a, wild E. excelsum population of Bajia Town; S_s, wild E. excelsum population of Sanjia Town. I, the seedling I stage, 0 < H ≤ 100.0 cm; II, the seedling II stage, H > 100.0 cm, DBH < 3.0 cm; III, the sapling stage, 3.0 cm ≤ DBH < 9.0 cm; IV, the small tree I stage, 9.0 cm ≤ DBH < 15.0 cm; V, the small tree II stage, 15.0 cm ≤ DBH < 21.0 cm; VI, the middle tree I stage, 21.0 cm ≤ DBH < 27.0 cm; VII, the middle tree II stage, 27.0 cm ≤ DBH < 33.0 cm; VIII, the adult tree I stage, 33.0 cm ≤ DBH < 39.0 cm; IX, the adult tree II stage, 39.0 cm ≤ DBH < 45.0 cm; X, the big tree stage, DBH ≥ 45.0 cm.