深入研究大规模和高分辨率的种群基因组学,解读海洋无脊椎动物结构和气候脆弱性的驱动因素
Audrey Bourret1, Christelle Leung1, Gregory N Puncher2
1Maurice Lamontagne Institute, Fisheries and Oceans Canada, Mont-Joli, Quebec, Canada.
Molecular ecology
|July 1, 2024
概括
广泛分布的北方种群显示,其遗传结构受到海洋流和环境因素的影响. 气候变化造成了脆弱性,特别是在南部地区,影响了这一关键的海洋无脊椎动物.
科学领域:
- 海洋生物学 海洋生物学
- 人口遗传学 人口遗传学
- 气候变化生态学 气候变化生态学
背景情况:
- 广泛分布的海洋物种对于了解气候变化对人口结构的影响至关重要.
- 海洋人口结构是由连接性和环境梯度所塑造的,气候变化使其复杂化.
研究的目的:
- 确定北方 (Pandalus borealis) 在其广泛分布的种群结构的驱动因素.
- 用基因组数据和环境相关性来预测物种对气候变化的脆弱性.
主要方法:
- 从24度度的54个站,用14331个SNP对1514个北方的个体进行基因定型.
- 评估遗传变异并将其与环境梯度 (盐度,温度) 相关联.
- 使用气候预测生成适应性景观,以预测基因组偏移和脆弱性.
主要成果:
- 确定了四个主要种群,其细微的基底结构与当地适应有关.
- 与海洋学流相关的中性遗传结构;与盐度和温度梯度相关的显著变化.
- 南方范围显示出最大的适应性立基因变异,但在气候预测下也显示出更大的基因组偏移.
结论:
- 北方种群的结构受到海洋学和当地适应环境梯度的影响.
- 预计气候变化将增加脆弱性,南部地区恶化,高度变得脆弱.
- 基因组洞察力揭示了人口结构和气候脆弱性的驱动因素,广泛分布的三浮游生物物种.
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