Demographic fluctuations in dynamic landscapes: the integration of molecular and paleoecological evidence in a primate model opens a window into the past

动态景观中的人口波动：灵长类动物模型中分子和古生态证据的整合打开了一扇通向过去的窗户

• 批准号: 327014332
• 负责人: Professorin Dr. Ute Radespiel
• 金额: --
• 依托单位: Institut für Zoologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/327014332?language=en
• 关键词: Demographic; fluctuations; dynamic; landscapes; integration

Marked climatic oscillations between glacial and interglacial periods had worldwide consequences for vegetation as well as animal population dynamics. The importance of these shallow-time (on geological and evolutionary timescales) dynamics for shaping current biodiversity and biogeography patterns is increasingly stressed, although rarely analyzed in an integrated manner. One of the necessary steps in order to understand the drivers of biodiversity is to synergize the efforts from various research fields by, for example, reconstructing the interplay between the degree and frequency of historic forest cover changes and demographic changes of forest-dependent organisms. This study will continue to integrate new records of vegetation and climate dynamics with inferred population dynamics to reconstruct the demographic dynamics of forest dwelling species over space and time in a primate genus endemic to Madagascar. Based on our successful work from the first funding period, this project will integrate demographic inferences based on molecular datasets of three mouse lemur species with high-resolution vegetation and climate dynamics that became now available from northern Madagascar and reach back to the Last Glacial Maximum (LGM). The integration of both datasets will allow to compare the sensitivity and performance of available demographic modelling tools when inferring demographic fluctuations. To reach these goals, available molecular datasets generated for mouse lemurs from northwestern and northern Madagascar will be analyzed and compared with available paleoecological datasets. Demographic reconstructions will be based on available RADSeq datasets and several full genomes generated for three mouse lemur species. Demographic modelling tools include Stairway Plots, PSMC analyses, and model-based coalescent approaches. This study will contribute substantially to a deeper understanding of the evolutionary history and future prospects of lemur populations in view of ongoing habitat fragmentation and future climate change.

冰期和间冰期之间显著的气候振荡对植被和动物种群动态产生了世界范围的影响。这些浅时间（地质和进化的时间尺度）动态塑造当前的生物多样性和地理格局的重要性越来越强调，虽然很少在一个综合的方式进行分析。为了了解生物多样性的驱动因素，一个必要步骤是协同各研究领域的努力，例如，重新构建历史上森林覆盖变化的程度和频率与依赖森林的生物体的人口变化之间的相互作用。这项研究将继续整合植被和气候动态的新记录与推断的人口动态重建森林栖息物种的人口动态在马达加斯加特有的灵长类属的空间和时间。基于我们在第一个资助期的成功工作，该项目将基于三种鼠狐猴物种的分子数据集，将人口统计推断与马达加斯加北方的高分辨率植被和气候动态相结合，并追溯到末次冰期最大期（LGM）。这两个数据集的整合将有助于比较现有人口建模工具在推断人口波动时的敏感性和性能。为了达到这些目标，从西北和北方马达加斯加的鼠狐猴产生的可用的分子数据集将进行分析，并与现有的古生态数据集进行比较。人口统计学重建将基于可用的RADSeq数据集和为三种鼠狐猴物种生成的几个全基因组。人口建模工具包括阶梯图、PSMC分析和基于模型的合并方法。这项研究将大大有助于更深入地了解狐猴种群的进化历史和未来的前景，鉴于持续的栖息地破碎化和未来的气候变化。