基因组学强调了对城市热岛效应的现象敏感性的低估
Meghan Blumstein1,2,3, Sophie Webster4,5, Robin Hopkins4,6
1Department of Environmental Sciences, University of Virginia, Charlottesville, VA 22903.
概括
城市热岛 (UHIs) 可能无法预测森林现象学上的温度影响. 考虑到城市树木的遗传多样性减少,以及环境变化,揭示了气温上升和更早的叶子脱落之间更强烈的联系.
科学领域:
- 生态生态学 生态生态学
- 植物现象学 植物现象学
- 气候变化生物学 气候变化生物学
- 基因组学就是基因组学.
背景情况:
- 温带森林的叶子发芽时间是影响全球气候系统的关键年度事件.
- 气温上升使叶子的发育时间每十年大约提前3天.
- 城市热岛 (UHIs) 常用于通过农村到城市的温度梯度来研究变暖效应.
研究的目的:
- 调查为什么城市热岛 (UHI) 梯度可能低于预测叶子对温度的现象反应.
- 为了测试这一假设,改变基因,除了环境,沿着农村到城市的梯度导致这种低预测.
- 为应对气候变化而建模遗传多样性对叶子退出时间的影响.
主要方法:
- 在城市和农村地区利用北方红树 (Quercus rubra) 的基因组,现象学和温度数据.
- 仅仅使用温度来比较叶子脱落时间的模型预测,与包含遗传多样性的模型进行比较.
- 分析了城市和农村树种群之间的遗传关系.
主要成果:
- 仅包括温度在内的模型预测了叶子向外推进的适度.
- 结合遗传多样性的模型预测了叶子在温度变化时的显著更大进步.
- 由于园艺实践,城市树木表现出减少的遗传多样性,并且与后来的叶子农村树木更为密切相关.
结论:
- 城市树木的基因组成的变化,不仅仅是环境变暖,影响了现象学反应.
- 使用UHI梯度的时空替代可能低估了气候变化对植物现象学的影响.
- 纳入遗传因素对于在未来气候场景下准确预测森林现象学至关重要.
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