Evolution of semelparous and iteroparous perennial plants:: Comparison between the density-independent and density-dependent dynamics
Evolution of semelparous and iteroparous perennial plants:: Comparison between the density-independent and density-dependent dynamics
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多年生和迭代多年生植物的进化：密度无关和密度依赖动力学之间的比较
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
T. Takada
中科院分区：
文献类型：
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作者：
T. Takada
摘要利用Lefkovitch矩阵模型分析了多年生植物繁殖频率的演化。该模型描述了一个种群动态与特定阶段的模式的繁殖和死亡的植物。分析了密度无关和密度相关两种模型，并对两种模型的计算结果进行了比较。在密度无关模型中，入侵条件取决于幼苗期存活率、种子出苗率以及种子数与成熟植株存活率之间的权衡曲线。这一结果与Schaffer & Gadgil（1975年，《群落的生态学与进化》）的研究在性质上相似。剑桥，MA：贝尔纳普出版社。）和Pianka（1976，Am. 16，775-784）。然而，在密度依赖模型中，可侵入条件不依赖于这些参数，而仅依赖于权衡曲线。因此，种子数量和成虫存活率之间的权衡以及种群动态的密度依赖性在繁殖频率的进化中起着重要的作用。然而，从阶段和年龄结构的人口模型得出的结果之间没有显着差异。
Abstract The evolution of the frequency of reproduction in perennial plants is analyzed using the Lefkovitch matrix model. The model describes a population dynamics with a stage-specific pattern of reproduction and mortality of plants. Both the density-independent and density-dependent models are analyzed, and the results of the two models are compared. In the density-independent model, the invasible condition depends on the survival rate at juvenile stage, the emergence rate of seeds and the trade-off curve between the number of seeds and the survival rate of mature plants. The result is qualitatively similar to the studies by Schaffer & Gadgil (1975, in: Ecology and Evolution of Communities. Cambridge, MA: Belknap Press.) and Pianka (1976, Am. Zool. 16, 775–784). However, in the density-dependent model, the invasible condition does not depend on those parameters, but on only the trade-off curve. Therefore, the trade-off between the number of seeds and the adult survival rate, and the density-dependence of the dynamics, play an important role in the evolution of the frequency of reproduction. However, there is no significant difference between the results derived from the stage- and the age-structured population models.