由于夏季气温上升,欧洲木的杆广泛崩
Jessie J Foest1, Michał Bogdziewicz2, Mario B Pesendorfer3
1Department of Geography and Planning, School of Environmental Sciences, University of Liverpool, Liverpool, UK.
Global change biology
|May 6, 2024
概括
气候变化正在破坏欧洲的木杆,这是一个重要的生殖战略. 夏季气温上升正在导致杆破坏,减少可行的种子生产,并威胁到森林再生.
科学领域:
- 生态生态学 生态生态学
- 林业林业 林业 林业 林业
- 气候变化生物学 气候变化生物学
背景情况:
- 树木种群的弹性取决于再生,在气候变化下人们对这一点了解甚少.
- 消化,或同步种子生产,有助于授粉,并威森林树木中的种子捕食者.
- 欧洲 (Fagus sylvatica) 呈现杆化,但气候变化可能正在改变这种模式.
研究的目的:
- 调查欧洲树种群中杆分解的驱动因素和流行率.
- 确定气候变化,特别是温度上升如何影响木种子生产的变化.
- 评估改造杆对欧洲木再生和森林动态的影响.
主要方法:
- 分析了50个长期数据集,涵盖欧洲种子生产及其分布.
- 种子生产年间变化 (CVp) 与当地温度趋势的相关变化,特别是在夏季 (6-7月).
- 检查了温度升高与作物失败和低种子年份的频率之间的关系.
主要成果:
- 夏季气温的上升,特别是6月和7月的平均最高气温,是欧洲木杆破坏的主要驱动因素.
- 在种子生产 (CVp) 中年间变异性下降的迹象表明,在整个物种的范围中广泛存在.
- 崩与相对变暖 (增加局部温度) 有关,而不仅仅是具有固有高平均温度的地点.
- 降低CVp可以降低可行的种子产量,即使总种子数量增加,对再生构成威胁.
结论:
- 气候变化引起的气候变暖正在导致欧洲树杆现象的崩.
- 这种分解通过降低可行的种子产量,隐蔽地降低了欧洲的再生潜力.
- 变化的杆动态对欧洲森林的未来运作和社区组成有重大影响.
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