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夜间的变暖促进了温带树种的树木生长
Bingxin Han1, Zhaoguo Wang1, Di Liu1
1Key Laboratory of Sustainable Forest Ecosystem Management - Ministry of Education, School of Ecology, Northeast Forestry University, Harbin, China.
Plant, cell & environment
|September 30, 2025
概括
夜间变暖通过增加细胞生产,显著增加温带树木的生长和液压导电性. 然而,白天的变暖延长了树形成期,显示了各种物种对不对称的变暖的反应.
科学领域:
- 森林生态森林生态学
- 植物生理学 植物生理学
- 气候变化研究研究气候变化研究
背景情况:
- 温带地区经历了不对称的变暖,根据白天和夜间温度的增加对树木生长产生不同的影响.
- 了解物种特异性反应和潜在机制对于预测气候变化下的森林生产力至关重要.
研究的目的:
- 调查不对称变暖对五种温带宽叶树种的辐射生长和树叶生成的影响.
- 阐明日间和夜间变暖处理的机制和物种特异性反应.
主要方法:
- 五种温带宽叶树种接受了环境控制,白天变暖 (DT+2,DT+4) 和夜间变暖 (NT+2,NT+4) 处理.
- 在整个生长季节监测辐射生长和树木的形成.
- 测量包括环宽和理论液压导电性.
主要成果:
- 在所有物种中,夜间变暖 (NT+2) 显著增加了环宽 (+99.42%) 和理论液压导电率 (+260.58%).
- 夜间变暖通过增加变形体和辐射扩大细胞来增强辐射生长.
- 白天的变暖延长了树叶形成期,在夜间的变暖下,平均环宽 (MRW) 与辐射扩大的细胞 (maxEC) 增加,特别是在树枝状菌根和同水性物种中.
结论:
- 不对称变暖对树木生长的影响取决于温度升高的时间和程度.
- 夜间的变暖通常比白天的变暖更有效地促进树木的生长.
- 根据未来的气候情景,研究结果提供了对森林生产率和碳捕获潜力的关键见解.
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