The adaptive advantage of phenotypic memory in changing environments
The adaptive advantage of phenotypic memory in changing environments
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DOI：
10.1098/rstb.1995.0147
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发表时间：
1995-11-29
影响因子：
6.3
通讯作者：
Czaran, T
中科院分区：
文献类型：
--
作者：
Jablonka, E;Oborny, B;Czaran, T
在简单模型的框架下研究了遗留效应的适应性价值，即尽管最初诱导这些表型的条件发生了变化，但诱导表型仍持续几代。三种不同的生物策略——非诱导型（遗传性）、完全诱导型（塑料性）和中间型（残留性）——在三种不同环境中的适应性方面进行了比较。分析结果和数值模拟表明，残留效应在随机环境中甚至比具有高适应性可塑性的生物体具有优势。我们认为，遗留效应代表了生态时间尺度上的一种适应机制，填补了短期个体适应和长期进化适应之间的差距。建议对可塑性概念进行扩展，将时间维度纳入其中，并包括通过克隆和有性世代诱导表型的稳定性。
The adaptive value of carry-over effects, the persistence of induced phenotypes for several generations despite the change in the conditions that first induced these phenotypes, is studied in the framework of a simple model. Three different organismal strategies - non-inducible (genetic), completely inducible (plastic), and intermediate (carry-over)-are compared in fitness terms within three different environments. Analytical results and numerical simulations show that carry-over effects can have an advantage in stochastic environments even over organisms with high adaptive plasticity. We argue that carry-over effects represent an adaptive mechanism on the ecological timescale that fills the gap between short-term individual adaptations and long-term evolutionary adaptations. An extension of the concept of plasticity to incorporate the time dimension and include the stability of induced phenotypes through both clonal and sexual generations, is suggested.