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在温带落叶的城市森林片段中,春季现象的特征:树木和灌木
Alison Donnelly1, Rong Yu2,3,4, Chloe Rehberg2
1Department of Geography, University of Wisconsin-Milwaukee, Milwaukee, WI, 53201, USA. alison.c.donnelly@gmail.com.
International journal of biometeorology
|February 4, 2024
概括
灌木比树木更早地表现出春季的现象学,本地灌木比非本地物种更早地脱叶. 这种延长灌木生长季节对森林生态系统产生影响,影响生产力和物种组成.
科学领域:
- 森林生态 森林生态
- 植物现象学 植物现象学
- 城市生态城市生态学
背景情况:
- 森林现象学研究经常忽视灌木,尽管它们在生态系统生产力中的重要作用,特别是在极端生长季节.
- 灌木更早地发叶,比树木更长时间保持绿色,可能会赋予竞争优势,特别是非本地物种.
研究的目的:
- 为了比较城市森林片段中同时出现的树木和灌木物种的春季现象学.
- 为了确定本地和非本地灌木和树木之间芽,叶子出来和全叶展开时间的差异.
主要方法:
- 监测了2017-2021年各种树木和灌木物种的春季现象 (芽,叶子发出,全叶展开).
- 利用了来自美国威斯康星州一个城市森林片段的数据.
- 统计分析了植物群体之间的现象时间差异.
主要成果:
- 与树木相比,灌木表现出明显较早的春季现象 (芽,叶子发出,全叶展开),比树木早大约三周.
- 本地灌木比非本地灌木更早显著地展现了全叶展开 (6天更早).
- 整个春季的现象季节在灌木中大约比树木长两周.
结论:
- 灌木植物现象学,特别是早期的叶子发出,在生长季节的极端,在生态系统的生产力中起着至关重要的作用.
- 在将植被群体之间的现象差异概括时,物种组成至关重要;本地灌木比非本地物种更早地开始完全叶子发育.
- 需要进行更长期的研究,以确定这些现象差异对森林动态,碳捕获和物种组成的全部影响.
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