Dissertation Research: Morphometric Reaction Norms Across Precipitation and Temperature Variability Gradients

论文研究：降水和温度变化梯度的形态反应规范

• 批准号: 9423446
• 负责人: Nancy Moran
• 金额: $ 0.8万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-04-15 至 1997-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9423446&HistoricalAwards=false
• 关键词: Dissertation; Research; Morphometric; Reaction; Norms

9423446 MORAN It is well established that a character of an organism can chanee in response to different environmental conditions, even though the underlying genetic composition of the organism is the same. This ability to respond to different environmental condition is termed phenotypic plasticity. Recent theoretical work suggests that phenotypic plasticity is favored by natural selection in variable environments as an evolutionary mechanism for coping with environmental variability. As such, phenotypic plasticity may affect evolutionary change and biodiversity in the broad sense. The purpose of this study is to test empirically the prediction made by the theoretical models, by comparing the levels of morphological phenotypic plasticity along precipitation and temperature variability gradients. This can increase our understanding of the importance of phenotypic plasticity in evolutionary change. In addition, this study may help conservation biologists understand the effects of environmental change on populations, as these are determined in part by their level of phenotypic plasticity. The study species, the pallid-wing grasshopper (Trimerotropis pallidipennis), is considered an agricultural pest in outbreak years. Knowledge of the importance of the environment on the genetics of this species may help us understand the evolution of insect outbreaks.

小行星9423446 众所周知，即使生物体的基本遗传组成是相同的，生物体的特征也会因不同的环境条件而改变。 这种对不同环境条件作出反应的能力被称为表型可塑性。 最近的理论工作表明，表型可塑性是在可变环境中的自然选择作为应对环境变异的进化机制所青睐的。 因此，表型可塑性可能会影响广义上的进化变化和生物多样性。 本研究的目的是通过比较沿着降水和温度变化梯度的形态表型可塑性水平，对理论模型的预测进行经验检验。 这可以增加我们对表型可塑性在进化变化中的重要性的理解。 此外，这项研究可能有助于保护生物学家了解环境变化对种群的影响，因为这些影响部分取决于它们的表型可塑性水平。 研究物种，苍白翅蝗虫（Trimerotropis pallidipennis），被认为是一种农业害虫在爆发年。 了解环境对该物种遗传学的重要性可能有助于我们了解昆虫爆发的演变。