THEORY OF MAST REPRODUCTION IN PLANTS: STORAGE‐SIZE DEPENDENT STRATEGY
THEORY OF MAST REPRODUCTION IN PLANTS: STORAGE‐SIZE DEPENDENT STRATEGY
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植物大量繁殖理论：储存规模依赖策略
DOI：
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发表时间：
1996
期刊：
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通讯作者：
A. Yamauchi
中科院分区：
文献类型：
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作者：
A. Yamauchi
无论肥大本身的原因如何，可用资源的量都可以被认为是限制植物中肥大播种行为的因素。停止生长但继续保持恒定大小的植物的繁殖策略是基于在繁殖和储存之间分配同化资源。如果植物死亡率和种群增长率都是恒定的，那么植物策略仅取决于其自身的储存量。在恒定和变化的环境下，从存储大小依赖策略的角度分析了肥大繁殖的进化条件，该策略受三个参数的影响：肥大播种的优势系数β;延迟播种的成本系数γ;和同化率P。（1）无论是在恒定环境下还是在变化环境下，肥大播种都只能以大于线性的努力繁殖成功率增加（β > 1）的方式进化;（3）在恒定的环境条件下，Sc* 随β和P的增大和γ的减小而增大;（4）与（3）相伴的是，一个中间期τ也随β的增大和τ的减小而增大，但与P无关;（5）在变化的环境中，Sc* 和τ的平均值随同化率P方差的增大而增大;（6）与（5）相伴的是，中间期具有一定的概率分布。此外，还讨论了种群内的生殖同步性以及肥大播种与物种多样性的关系。
The amount of available resource can be considered to restrict mast seeding behavior in plants, regardless of the cause of masting itself. The reproductive strategy of a plant that has stopped growing, but continues to maintain a constant size, is based on the allocation of assimilated resources between reproduction and storage. If both plant death and population growth rates are constant, the plant strategy is dependent only on its own storage size. Conditions for the evolution of mast reproduction were analyzed under both constant and varying environments, from the view point of storage‐size dependent strategy, which is influenced by three parameters: the advantage coefficient of mast seeding, β; the cost coefficient of delayed seeding, γ; and the assimilation rate, P. The model indicated that: (1) mast seeding evolves only with a greater than linear increase in reproductive success with effort (β > 1) under both constant and varying environments; (2) in mast seeding, a critical storage size, Sc*, occurs, above which plants utilize all storage for reproduction; (3) in a constant environment, Sc* increases with increasing β and P and/or decreasing γ; (4) concomitant with (3), an intermasting period, τ, also increases with increasing β and decreasing 7, but is independent of P; (5) in a varying environment, Sc* and the average of τ increase with increasing variance of the assimilation rate, P; and (6) concomitant with (5), the intermasting period has a certain probability distribution. In addition, reproductive synchrony within the population and the relationship between mast seeding and species diversity are discussed.