SeaChange: The evolutionary response of fish stocks to a changing ocean

SeaChange：鱼类种群对海洋变化的进化反应

• 批准号: 467026478
• 负责人: Dr. Julia Tovar Verba
• 金额: --
• 依托单位: Abteilung Evolutionsökologie
• 依托单位国家: 德国
• 项目类别: WBP Position
• 财政年份: 2021
• 资助国家: 德国
• 起止时间: 2020-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/467026478?language=en
• 关键词: SeaChange; evolutionary; response; fish; stocks; SeaChange; evolutionary; response; fish; stocks

Ongoing climate change has led to a biodiversity crisis at a global scale, with populations reductions or extinctions being reported even in well-preserved areas of the globe. In addition, human overexploitation of natural resources has placed conservation as one of the most pressing challenges in modern societies, particularly of the highly vulnerable marine organisms. With SeaChange, we will focus on a tropical sardine species of marked economic and ecological relevance in Brazil to understand how this species has responded to past climate change, and to predict how it will respond to future changes in temperature. Using genomic tools that are now available for non-model organisms, I will develop a novel and transferable approach to monitor fish stocks, establishing a research program that will impact both science and policy. More specifically, this proposal has mainly three scientific objectives: i) Investigate the number of stocks of Harengula sp. occurring along the Brazilian coast and the genetic connectivity between these stocks.ii) Calculate current and past effective population size and test its correlation with temperature variability and habitat suitability. By testing the variability in population size in comparison with changes in habitat, we will be able to clarify if the species was positively or negatively affected by past environmental change and predict future effects.iii) Identify which genomic regions underlie species adaptation to temperature. The identification of these regions will help to predict this species response to future warming and will contribute to the understanding of the genomic bases of temperature adaptation.All of these questions can be addressed with population genomic methods that are in place in Dr. Pereira’s lab (LMU-Munich). Yet, these methods require 1) the whole genome resequencing of Harengula sp. samples collected in a temperature gradient, 2) a working environment with suitable facilities and 3) the contribution of collaborators with complementary skills.The Walter Benjamin Position at Dr. Pereira’s lab will allow me to successfully complete this proposal, by providing the conditions in terms of possibility of learning new skills, access to laboratories and supercomputers available at the Evolutionary Biology Department from LMU and the connection with other researchers. This project will not only contribute to the understanding of the impact of increasing temperature on the studied sardine and to other tropical species with similar exploitation and biological characteristics, but will be also crucial for my career development as a Fishery Genomics scientist.

持续的气候变化导致了全球范围内的生物多样性危机，即使在保存完好的全球地区，人口也会减少或扩展。此外，人类的自然资源过度开发已经将保护视为现代社会中最紧迫的挑战之一，尤其是高度脆弱的海洋生物。借助Seachange，我们将重点关注巴西具有明显经济和生态相关性的热带沙丁鱼种类，以了解该物种如何应对过去的气候变化，并预测其将如何应对温度的未来变化。使用现在可用于非模型组织的基因组工具，我将开发一种新颖且可转移的方法来监测鱼类股票，建立一项将影响科学和政策的研究计划。更具体地说，该提案主要具有三个科学目标：i）调查Harengula sp的库存数量。发生在巴西海岸以及这些股票之间的遗传连接性。通过与栖息地的变化相比，通过测试人口规模的变异性，我们将能够澄清该物种是否受到过去环境变化的积极或负面影响并预测未来的效果。III）确定哪些基因组区域是对温度适应温度的基础。这些区域的识别将有助于预测该物种对未来变暖的反应，并有助于理解温度适应的基因组基础。所有这些问题都可以用Pereira博士实验室（LMU-Munich）中的种群基因组方法来解决。然而，这些方法需要1）Harengula sp。的整个基因组重新陈述。在温度梯度中收集的样本，2）一个具有合适设施的工作环境，以及3）合作者的贡献。沃尔特·本杰明（Walter Benjamin）在佩雷拉（Pereira）博士实验室的职位将使我能够通过学习新技能，对实验室和超级计算机的可能性，从LMU和其他研究中获得新的技能和超级计算机的可能性，从而使我能够成功地完成这项建议，并与其他研究人员一起提供了其他研究。该项目不仅有助于理解增加的影响。在研究菌的沙丁鱼和其他具有相似剥削和生物学特征的热带物种上的温度，但对于我作为渔业基因组学科学家的职业发展也至关重要。