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在整个阿巴拉契亚步道走廊中,春季现象学转移的截然不同的度模式
Jordon C Tourville1, Georgia L D Murray1, Sarah J Nelson1
1Appalachian Mountain Club, Gorham, New Hampshire, USA.
Ecology
|August 29, 2024
概括
气候变化在美国东部推动了春季植物现象学. 暖化扩大了北方阿巴拉契亚小径的春季窗口,可能有利于地下植物.
科学领域:
- 生态生态学 生态生态学
- 气候科学 气候科学
- 植物学 植物学
背景情况:
- 气候变化正在推动美国东部森林的春季现象学.
- 地下植物可能会受到较早的树冠关闭的负面影响.
- 现象变化的空间模式尚未得到充分理解.
研究的目的:
- 评估整个阿巴拉契亚步道 (AT) 走廊春季现象窗口的潜在变化.
- 为了检查底层树木和树冠物种对春季温度的敏感性.
- 了解现象学对变暖反应的区域差异.
主要方法:
- 来自阿巴拉契山脉俱乐部 (AMC) 和国家色学网络 (NPN) 的综合公民科学数据 (2004-2022年).
- 利用等级贝叶斯模型分析了25种物种的开花和叶子发芽时间.
- 在AT走廊的度区域 (南,中大西洋,北) 进行分区分析.
主要成果:
- 春季现象学对于底层和树冠植物都随着变暖 (分别为~6天和~3天/°C) 进步.
- 与南部或北部地区 (~5天/°C) 相比,大西洋中部地区 (~10天/°C) 的现象学进步更大.
- 北部观察到春季现象窗口的扩大,下层树木对温度有更大的敏感性.
结论:
- 森林植物现象学显示,在AT走廊的度梯度上,对全球变暖的敏感性不同.
- 北方春季现象窗口的扩大可能有利于地下植物,但会带来诸如授粉者不匹配和风易感等风险.
- 公民科学数据对于理解大规模现象学趋势和告知森林气候弹性至关重要.
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