树冠结构通过调节温带森林的小气候来调节秋季物候变化

IF 29.6 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES
Xiaoyong Wu, Chunyue Niu, Xiaoqiang Liu, Tianyu Hu, Yuhao Feng, Yingyi Zhao, Shuwen Liu, Zhonghua Liu, Guanhua Dai, Yao Zhang, Koenraad Van Meerbeek, Jin Wu, Lingli Liu, Qinghua Guo, Yanjun Su
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引用次数: 0

摘要

秋季物候在形成温带森林固碳能力方面起着至关重要的作用。近来,秋季物候在局部范围内的显著变化引起了越来越多的关注,这可能会给温带森林生产力的预测带来很大的不确定性。然而,驱动这些变化的基本机制仍未得到充分阐明。在这里,我们在六个温带森林地点观察到了树冠结构与秋季物候之间显著而一致的关系,这种关系是由树冠结构对小气候条件的调节作用引起的。将已确定的 "树冠结构-小气候-秋季物候 "途径纳入现有的秋季物候模型可显著提高预测精度,并减少本世纪剩余时间内秋季开始的预计延迟。这些发现为解释温带森林秋季物候的局部变化提供了一个新的视角,并强调了将确定的途径纳入地球系统和植被模型的迫切需要,特别是考虑到宏观气候和微观气候条件的非同步变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Canopy structure regulates autumn phenology by mediating the microclimate in temperate forests

Canopy structure regulates autumn phenology by mediating the microclimate in temperate forests

Canopy structure regulates autumn phenology by mediating the microclimate in temperate forests
Autumn phenology plays a critical role in shaping the carbon sequestration capacity of temperate forests. Notable local-scale variations in autumn phenology have drawn increasing attention recently, potentially introducing substantial uncertainty when predicting temperate forest productivity. Yet the underpinning mechanisms driving these variations remain inadequately elucidated. Here we observed significant and consistent relationships between canopy structure and autumn phenology across six temperate forest sites, induced by the regulation effect of canopy structure on microclimate conditions. Incorporating the identified ‘canopy structure–microclimate–autumn phenology’ pathway into existing autumn phenology models significantly improves the prediction accuracy and reduces the projected delay in the start of autumn over the remainder of the century. These findings offer a new perspective for interpreting the local variations of autumn phenology in temperate forests and emphasize the urgent need to integrate the identified pathway into the Earth system and vegetation models, especially considering the asynchronous changes of macroclimate and microclimate conditions. The authors demonstrate a significant influence of canopy structure on autumn phenology in temperate forests, mediated by microclimate regulation. Incorporating this relationship into autumn phenology models enhances their prediction accuracy and reduces previously projected delays in autumn phenology.
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来源期刊
Nature Climate Change
Nature Climate Change ENVIRONMENTAL SCIENCES-METEOROLOGY & ATMOSPHERIC SCIENCES
CiteScore
40.30
自引率
1.60%
发文量
267
审稿时长
4-8 weeks
期刊介绍: Nature Climate Change is dedicated to addressing the scientific challenge of understanding Earth's changing climate and its societal implications. As a monthly journal, it publishes significant and cutting-edge research on the nature, causes, and impacts of global climate change, as well as its implications for the economy, policy, and the world at large. The journal publishes original research spanning the natural and social sciences, synthesizing interdisciplinary research to provide a comprehensive understanding of climate change. It upholds the high standards set by all Nature-branded journals, ensuring top-tier original research through a fair and rigorous review process, broad readership access, high standards of copy editing and production, rapid publication, and independence from academic societies and other vested interests. Nature Climate Change serves as a platform for discussion among experts, publishing opinion, analysis, and review articles. It also features Research Highlights to highlight important developments in the field and original reporting from renowned science journalists in the form of feature articles. Topics covered in the journal include adaptation, atmospheric science, ecology, economics, energy, impacts and vulnerability, mitigation, oceanography, policy, sociology, and sustainability, among others.
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