When to store energy in a stochastic environment.
When to store energy in a stochastic environment.
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DOI：
10.1111/j.1558-5646.2010.01198.x
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发表时间：
2011-05
期刊：
影响因子：
--
通讯作者：
Taborsky B
中科院分区：
文献类型：
--
作者：
Fischer B;Dieckmann U;Taborsky B
储存能量的能力使生物体能够应对暂时恶劣和不确定的条件。实证研究表明，适应能量波动的生物体可以塑性地调整其储存策略。然而，到目前为止，理论研究仅在恒定或确定性变化的环境中研究了通用存储策略。在本研究中，我们分析了在能源可用性随机变化的环境中，存储能源的能力如何影响存储、再生和维护的最佳能源分配。我们发现，当环境能源可用性处于中等水平且能源存储尚未太满时，存储分配在进化上是最优的。在能源可用性变化率低且可预测性低的环境中，存储能源并不是最佳选择。随着环境变得更加多变或更加可预测，能源分配到存储越来越受到青睐。通过改变环境变异性、环境可预测性和生存成本，我们获得了各种不同的最佳生活史策略，从高度单产到半产，它们的储存模式存在显着差异。我们的结果表明，在随机变化的环境中，同时分配复制、维护和存储可能是最佳的，这与之前在确定性环境中获得的发现形成鲜明对比。
The ability to store energy enables organisms to deal with temporarily harsh and uncertain conditions. Empirical studies have demonstrated that organisms adapted to fluctuating energy availability plastically adjust their storage strategies. So far, however, theoretical studies have investigated general storage strategies only in constant or deterministically varying environments. In this study, we analyze how the ability to store energy influences optimal energy allocation to storage, reproduction, and maintenance in environments in which energy availability varies stochastically. We find that allocation to storage is evolutionarily optimal when environmental energy availability is intermediate and energy stores are not yet too full. In environments with low variability and low predictability of energy availability, it is not optimal to store energy. As environments become more variable or more predictable, energy allocation to storage is increasingly favored. By varying environmental variability, environmental predictability, and the cost of survival, we obtain a variety of different optimal life-history strategies, from highly iteroparous to semelparous, which differ significantly in their storage patterns. Our results demonstrate that in a stochastically varying environment simultaneous allocation to reproduction, maintenance, and storage can be optimal, which contrasts with previous findings obtained for deterministic environments.
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影响因子：
1.9
作者：
HOUSTON, AI;MCNAMARA, JM
通讯作者：
MCNAMARA, JM
影响因子：
5.2
作者：
Gurney, WSC;Middleton, DAJ
通讯作者：
Middleton, DAJ
DOI：
10.1086/596536
发表时间：
2009-03
期刊：
The American naturalist
影响因子：
--
作者：
Fischer B;Taborsky B;Dieckmann U
通讯作者：
Dieckmann U
影响因子：
4.8
作者：
CHIARIELLO, N;ROUGHGARDEN, J
通讯作者：
ROUGHGARDEN, J
影响因子：
3.3
作者：
GOMULKIEWICZ, R;KIRKPATRICK, M
通讯作者：
KIRKPATRICK, M