在一个广泛分布的跨大陆北极树种中,未来的碳封存潜力:持续的遗传变异很重要!
Etienne Robert1,2, Patrick Lenz3, Yves Bergeron1,4
1Département des Sciences Biologiques, Université du Québec à Montréal, Montréal, Quebec, Canada.
Global change biology
|June 1, 2024
概括
气候变化对黑杉的生长产生了负面影响,尤其是在西方地区. 考虑到遗传变异对于预测树木的反应和确保有效的复林工作至关重要.
科学领域:
- 生态生态学 生态生态学
- 遗传学 是一个遗传学.
- 气候科学 气候科学
背景情况:
- 气候变化 (CC) 需要重新造林和植树,以捕获碳.
- 了解树木对CC的生长反应对于计划的有效性至关重要.
- 遗传变异影响着树种群对环境变化的反应.
研究的目的:
- 为了评估黑杉 (BS) 的生长潜力,考虑到基因变异的存在.
- 确定影响BS增长的关键气候变量 (1974-2019).
- 检查当地适应和植物地理结构在BS生长中对CC的反应中的作用.
- 在未来的气候场景下 (共享社会经济路径) 预测BS的增长,具有遗传变异.
主要方法:
- 开发了一个框架来评估人口规模的树木生长潜力与遗传变异.
- 应用机器学习对来自2600多棵黑树 (62个种群) 的树生态和遗传数据.
- 在常见花园实验中模拟和模拟BS生长到2100年.
主要成果:
- 高温的夏季和秋季气温对黑杉的生长产生了负面影响.
- 到2100年预计的增长下降表明,对预期的CC的不适应.
- 在遗传集群中观察到CC反应的显著差异,西方人口受到影响更大.
- 与植物地理结构相关的内部特异性遗传变异会影响CC反应.
结论:
- 黑的生长受到温度升温的威胁,可能会降低碳捕获能力.
- 植物地理结构和持续的遗传变异是预测物种对CC的反应的关键因素.
- 森林再生和保护战略必须纳入气候适应性遗传多样性.
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