Optimal resource allocation and prolonged dormancy strategies in herbaceous plants
Optimal resource allocation and prolonged dormancy strategies in herbaceous plants
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草本植物的优化资源分配和延长休眠策略
DOI：
10.1111/1365-2745.13466
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发表时间：
2020
影响因子：
5.5
通讯作者：
Satake, ed., Akiko
中科院分区：
文献类型：
--
作者：
Watts, J. Colton;Tenhumberg, Brigitte;Satake, ed., Akiko
了解不同生命史的适应性后果对于解释其多样性和预测环境条件变化的影响至关重要。然而，目前的植物生活史理论依赖于现象学，而不是机械论，资源生产模型。我们结合了一个得到充分支持的个体发育机制模型，该模型将总资源生产和维护成本的大小依赖性缩放差异与动态优化模型相结合，以预测繁殖和延长休眠的时间表。（植物在地下停留≥1个生长季节），最大限度地提高一生的后代产量。我们的模型做出了三个新的预测：第一、维持成本强烈地影响着一次结实或多次结实生活史演化的条件，以及资源如何分配给多次结实的繁殖。植物其次，与以前的理论相反，我们的模型允许植物通过分配更大比例的资源来储存，从而提高越冬生存率，以补偿低生存条件。在模型中阐明这种生态机制至关重要，因为如果没有它，我们的模型永远不会预测对存储的重大投资，这与经验观察不一致。第三，我们的模型预测，长时间的休眠可能只会演变为对资源分配权衡的响应。我们的研究结果表明，维护成本和资源分配对生存的影响是不同的生活史策略的健身后果的主要决定因素，但以前的植物生活史进化理论在很大程度上忽略了这些因素。我们的研究结果也验证了最近的论点，延长休眠可能是发芽成本的最佳反应。这些发现对理解植物生活史变异模式和预测植物对环境变化的反应具有广泛的意义。
Understanding the fitness consequences of different life histories is critical for explaining their diversity and for predicting effects of changing environmental conditions. However, current theory on plant life histories relies on phenomenological, rather than mechanistic, models of resource production.We combined a well‐supported mechanistic model of ontogenetic growth that incorporates differences in the size‐dependent scaling of gross resource production and maintenance costs with a dynamic optimization model to predict schedules of reproduction and prolonged dormancy (plants staying below ground for ≥1 growing season) that maximize lifetime offspring production.Our model makes three novel predictions: First, maintenance costs strongly influence the conditions under which a monocarpic or polycarpic life history evolves and how resources should be allocated to reproduction by polycarpic plants. Second, in contrast to previous theory, our model allows plants to compensate for low survival conditions by allocating a larger proportion of resources to storage and thereby improving overwinter survival. Incorporating this ecological mechanism in the model is critically important because without it our model never predicts significant investment into storage, which is inconsistent with empirical observations. Third, our model predicts that prolonged dormancy may evolve solely in response to resource allocation trade‐offs.Significance. Our findings reveal that maintenance costs and the effects of resource allocation on survival are primary determinants of the fitness consequences of different life history strategies, yet previous theory on plant life history evolution has largely ignored these factors. Our findings also validate recent arguments that prolonged dormancy may be an optimal response to costs of sprouting. These findings have broad implications for understanding patterns of plant life history variation and predicting plant responses to changing environments.
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积分投影模型显示外来蓟比本地蓟更受环境竞争和食草的限制
DOI：
--
发表时间：
2015
期刊：
影响因子：
--
作者：
B. Tenhumberg;Tomomi Suwa;A. Tyre;F. L. Russell;S. Louda
通讯作者：
S. Louda
影响因子：
1.4
作者：
HOUSTON, AI;MCNAMARA, JM
通讯作者：
MCNAMARA, JM
影响因子：
2.1
作者：
P. Klinkhamer;Takuya Kubo;Yoh Iwasa
通讯作者：
P. Klinkhamer;Takuya Kubo;Yoh Iwasa
影响因子：
2.6
作者：
E. Pianka
通讯作者：
E. Pianka
与多年生草本植物和蕨类植物的长期休眠有关的栖息地偏好
影响因子：
1.7
作者：
Margit Reintal;Kadri Tali;M. Haldna;T. Kull
通讯作者：
T. Kull