Kingsolver R W
Division of Science & Mathematics Missouri Valley College, 65340, Marshall, MO, USA.
Oecologia. 1986 Jun;69(3):380-387. doi: 10.1007/BF00377060.
The life history of Yucca glauca in the Great Plains was the subject of a four year field study. Data were incorporated in a stage transition model (based on rosette size) to explain how populations are maintained in spite of large regional and temporal variation in sexual reproductive success. Rosette size was found to be a good predictor of flowering effort, but a poor predictor of fruit set. Large rosettes that failed to set fruit, however, exhibited an increased capacity for vegetative reproduction. Asexual reproduction contributes to population stability by reducing the variance in annual recruitment, and perhaps by damping oscillations caused by departures from a stable stage distribution.
大平原丝兰的生活史是一项为期四年的实地研究的主题。数据被纳入一个阶段转换模型（基于莲座丛大小），以解释尽管有性繁殖成功率存在较大的区域和时间变化，种群是如何得以维持的。结果发现，莲座丛大小是开花努力的良好预测指标，但对坐果情况的预测能力较差。然而，未能结果的大型莲座丛表现出更强的营养繁殖能力。无性繁殖通过减少年度补充的方差，或许还通过抑制偏离稳定阶段分布所引起的波动，对种群稳定性做出贡献。
