Assuming genetic variants are selectively neutral, estimates of intraspecific genetic diversity and population structure should increase simultaneously in parallel to coalescent time, population size and gene flow. However, other processes, such as genetic drift associated with demographic fluctuations, might cause a loss of genetic diversity while not affecting population structure. In this study, we assess large-scale patterns of estimates of intraspecific genetic variation across species to determine the roles of dispersal, biogeography, divergence time and demographic fluctuations in decoupling genetic diversity and population structure.

中文翻译：

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从温带到热带河流种内遗传多样性和种群结构值增加的宏观生态趋势

假设遗传变异是选择性中性的，种内遗传多样性和种群结构的估计值应与合并时间、种群大小和基因流同时增加。然而，其他过程，例如与人口波动相关的遗传漂变，可能会导致遗传多样性的丧失，同时不影响种群结构。在这项研究中，我们评估了物种间种内遗传变异的大规模估计模式，以确定分散、生物地理学、分化时间和人口波动在分离遗传多样性和种群结构中的作用。