Vegetation structure drives forest phenological recovery after hurricane
Vegetation structure drives forest phenological recovery after hurricane
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DOI：
10.1016/j.scitotenv.2021.145651
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发表时间：
2021-06
影响因子：
9.8
通讯作者：
Yuan-Bo Gong;C. Staudhammer;Gavin R. Kenney;S. Wiesner;Yinlong Zhang;G. Starr
中科院分区：
文献类型：
--
作者：
Yuan-Bo Gong;C. Staudhammer;Gavin R. Kenney;S. Wiesner;Yinlong Zhang;G. Starr
飓风通过减少叶面积、减少生物量并导致植物死亡来影响森林的结构和功能。量化飓风对森林物候过程的影响有助于更好地了解这些系统对自然灾害的反应。 2018 年 10 月 10 日，飓风迈克尔在墨西哥湾北部登陆，对沿途森林造成大面积破坏。使用物候模型，我们评估了受风暴影响的两个亚热带森林物候过程的短期响应和恢复。我们的研究结果表明，飓风在风暴过后加速了秋季的衰老，导致生长季节缩短。响应取决于风暴前森林的结构和受损程度；树冠较高的森林比树冠较短的森林受到的损害更大，恢复期也更长。在飓风后第一年的夏季，生态系统的生理功能开始恢复到飓风前的水平，这与生长季节长度的恢复相对应。林下层的功能多样性可能有助于飓风后春季物候的恢复。虽然夏季物候与植被覆盖率同步，并且主要由冠层叶面积的增加驱动，但这些森林在研究期间尚未完全恢复。随着全球气候变化引发的极端天气事件和灾害可能更加频繁，我们的研究可以为灾后森林管理实践提供参考，因地制宜，为恢复工作做出贡献。
Hurricanes affect the structure and function of forests by removing leaf area, reducing biomass, and causing plant mortality. Quantifying the effects of hurricanes on the phenological processes of forests can help to develop a better understanding of the responses of these systems to natural disasters. On October 10, 2018 Hurricane Michael made landfall in the northern Gulf of Mexico causing extensive damage to forests within its path. Using a phenology model, we evaluated the short-term response and recovery of phenological processes of two subtropical forests that were affected by the storm. Our results suggest that the hurricane accelerated senescence in autumn following the storm, leading to a shorter growing season. The response was dependent on the structure of the forest prior to the storm and the degree of damage; the forest with a taller canopy had greater damage, and the recovery period was prolonged compared to the forest with a shorter canopy. In the summer of the first year following the hurricane, ecosystem physiological function began to return to pre-hurricane levels which corresponded to a recovery in growing season length. The functional diversity in the understory may have aided recovery of post-hurricane spring phenology. While summer phenology was synchronized with the rate of vegetation coverage and mainly driven by increase in canopy leaf area, these forests have not completely recovered during the study. As extreme weather events and disasters induced by global climate change may become more frequent, our research can provide a reference for post-disaster forest management practices which can be adapted to local conditions and contribute to restoration efforts.