在北方生态系统中,尽管最近气候变化,但植被绿化与衰老的时间分配比例始终一致
Fandong Meng1, Andrew J Felton2, Jiafu Mao3
1State Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China.
Science advances
|June 7, 2024
概括
尽管气候变化,在大多数北方生态系统中,植被变绿和衰老时间之间的平衡仍然稳定. 这种稳定性是由相互关联的植物现象事件驱动的,这表明植物对植物反应的内在生物控制.
科学领域:
- 生态生态学 生态生态学
- 气候科学 气候科学
- 植物生物学 植物生物学
背景情况:
- 气候变暖正在延长生长季节,但对植物现象学事件的相对时间的影响,例如叶子生长与衰老,人们对其了解甚少.
- 现有的研究主要集中在现象事件的时间或持续时间的变化上,而不是它们之间的时间分配.
研究的目的:
- 研究气候变化如何影响北方生态系统中植被变绿和衰老之间的相对时间分配.
- 为了确定花在绿化和衰老中的时间比率是否已经改变,尽管生长季节的长度发生了变化.
主要方法:
- 从2001年到2020年利用了多个卫星和地面观测.
- 在超过83%的北方生态系统中分析了植被现象事件.
- 将经验观测与来自13个动态全球植被模型的模拟进行了比较.
主要成果:
- 在大多数 (83%) 北方生态系统中,植物变绿与衰老的时间比率保持稳定 (1.27 ± 0.92).
- 尽管最近发生了气候变化,但这种稳定性仍然存在,并且独立于生长季节的长度变化.
- 发现了一个广泛的积极关系:更长的绿化期与更长的衰老期相关.
结论:
- 植物现象学表现出内在的生物控制,影响气候变化下的衰老时间.
- 稳定的绿化到衰老时间比率表明,植物内部过程可以缓冲外部气候变化.
- 研究结果强调了现象事件的相互联系及其在生态系统对变暖的反应中的作用.
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