Collaborative Research: Impacts of severe drought on tropical forest post-disturbance recovery

合作研究：严重干旱对热带森林扰乱后恢复的影响

• 批准号: 2140580
• 负责人: Maria Uriarte
• 金额: $ 100.52万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-07-01 至 2026-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2140580&HistoricalAwards=false
• 关键词: Collaborative; Research; Impacts; severe; drought

The frequency and severity of drought in tropical forests is expected to increase in the next decade. Further, the intensity of hurricanes is also anticipated to rise with a warming climate. Hurricanes damage the forest structure, increasing understory light and temperature. Tree species that respond to increased light conditions are also particularly sensitive to water stress. As a result, forests recovering from hurricanes may be susceptible to drought. This project studies the recovery process in a tropical forest in Puerto Rico, including the impacts of water stress on re-growing trees. The researchers are conducting a rainfall manipulation experiment in a forest that is recovering from Hurricane Maria (2017). The project is helping characterize and predict forest resilience to climate change. Results are being shared with scientists and managers working in the U.S. Forest Service. Nine early career scientists are gaining valuable experience in ecological research. A series of webinars are also communicating results with the public. The project is conducting a large-scale partial rainfall exclusion experiment in the Luquillo Experimental Forest in Puerto Rico. Additional data is being collected from the nearby 16-ha mapped Luquillo Forest Dynamics Plot. These data include long-term demographic information collected after the passage of Hurricane Maria (2017) and two other hurricanes. This information is adding to the understanding of the ecophysiological responses of trees to the joint impacts of drought and hurricane damage. The project is characterizing post-hurricane recovery under variable rainfall conditions. By including and improving representation of tree hydraulics and the effects of hurricane damage on water and carbon dynamics in the Ecosystem Demography model, the research is advancing assessment of the impacts of various climate change scenarios on tree species composition and carbon dynamics.This project was partially supported by the Integrative Ecological Physiology program in Integrative Organismal Systems.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

预计在未来十年中，热带森林中干旱的频率和严重程度将增加。此外，预计飓风的强度也将随着温暖的气候而上升。飓风破坏了森林结构，增加了林下的光和温度。响应增加光条件的树种也对水应激特别敏感。结果，从飓风中恢复的森林可能容易干旱。该项目研究波多黎各的热带森林中的恢复过程，包括水应力对重种植树木的影响。研究人员正在从飓风玛丽亚（2017）中恢复过的森林中进行降雨操纵实验。该项目有助于表征和预测森林对气候变化的韧性。结果与在美国森林服务局工作的科学家和经理分享。九名早期职业科学家在生态研究中获得了宝贵的经验。一系列网络研讨会也正在与公众传达结果。该项目正在波多黎各的Luquillo实验森林中进行大规模的部分降雨排除实验。正在从附近的16-HA映射Luquillo森林动力学图中收集其他数据。这些数据包括飓风玛丽亚（Maria）（2017）和另外两次飓风之后收集的长期人口信息。这些信息增加了对树木对干旱和飓风损害的共同影响的生态生理反应的理解。该项目是在可变的降雨条件下表征后赫里坎恢复的。通过在生态系统人口统计模型中包括并改善树液压的表示以及飓风损害对水和碳动态的影响，该研究正在进步评估各种气候变化情景对树种物种组成和碳动态的影响的影响。该项目在整合性的生态学方面通过综合体系来支持，并反映了nsf的综合生态学，并反映了ns。使用基金会的智力优点和更广泛的影响评估标准进行评估。