A comparative analysis of the adaptive developmental plasticity hypothesis in six Mediterranean anuran species along a pond permanency gradient
A comparative analysis of the adaptive developmental plasticity hypothesis in six Mediterranean anuran species along a pond permanency gradient
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六种地中海无尾目物种沿着池塘永久性梯度的适应性发育可塑性假说的比较分析
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
A. Montori
中科院分区：
文献类型：
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作者：
À. Richter;G. Llorente;A. Montori
问题：发育表型可塑性是一种适应性特征，因此在可变和不可预测的环境中更灵活吗？生物：无尾类幼虫群落，包括Alytes obstricans、Pelodytes punctatus、Bufo bufo、B。calamita，Hyla spectonalis和Rana perezi。研究方法：在现场，我们研究了生态宽度（空间和时间的变化）的6种沿着池塘永久性梯度在240池塘。在实验室中，我们使用两种处理（1）恒定水位和（2）干燥处理来测量每个物种的发育可塑性（变态的时间和大小）。比较分析了发育可塑性与物种生态宽度的功能及其系统发育关系。结果如下：使用各种栖息地或不可预测环境的物种比那些在可预测栖息地发生的物种表现出更大的反应可塑性。在两个极端的水文周期（短暂的和永久的池塘），专业的发展表型与有限的可塑性发生，而从可变的栖息地（临时池塘）的物种可以被认为是塑料战略家与不对称的赌注对冲。我们的研究结果支持这一假设，种间差异的发育表型可塑性是适应性的，并与生态的广度和不可预测性。
Question: Is developmental phenotypic plasticity an adaptive trait and therefore more flexible in variable and unpredictable environments? Organism: The anuran larvae community encompassing Alytes obstetricans, Pelodytes punctatus, Bufo bufo, B. calamita, Hyla meridionalis, and Rana perezi. Methods: In the field, we examined the ecological breadth (spatial and temporal variability) of the six species along a pond permanency gradient in 240 ponds. In the laboratory, we measured developmental plasticity (time to and size at metamorphosis) of each species using two treatments: (1) constant water level and (2) drying treatment. A comparative analysis was undertaken of developmental plasticity and the function of species ecological breadth and their phylogenetic relationship. Results: Species that use a wide variety of habitats or unpredictable environments showed a greater plasticity of responses than those occurring in predictable habitats. At the two extremes of the hydroperiod (ephemeral and permanent ponds), specialist developmental phenotypes with limited plasticity occur, whereas species from variable habitats (temporary ponds) can be considered plastic strategists with asymmetric bet-hedging. Our results support the hypothesis that interspecific differences in developmental phenotypic plasticity are adaptive and are related to ecological breadth and unpredictability.