Doctoral Dissertation Research: Intermediate-severity wind disturbance and cultural fire in the maintenance of mixedwood forests

博士论文研究：中度风扰和文化火灾在混交林维护中的应用

• 批准号: 2224894
• 负责人: Justin Hart
• 金额: $ 1.75万
• 依托单位: University of Alabama Tuscaloosa
• 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: 2022-09-01 至 2024-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2224894&HistoricalAwards=false
• 关键词: Doctoral; Dissertation; Research; Intermediate; severity

Forest ecosystems worldwide are projected to face increasing stress over the next century as climate change modifies the ecological conditions driving forest growth. Biodiverse forests that contain a wide range of plant species are hypothesized to be more resistant and resilient to disturbance events and forest stresses than systems with less biological diversity. But it is not clear how future stresses to forest systems will affect biodiversity in different types of forests. This project quantifies the impacts of intermediate-severity wind disturbance on forest succession and development of shortleaf pine neighborhoods in a mixed oak-pine forest. This project also documents the effects of prescribed fire in shortleaf pine dominated mixed oak-pine forests previously unaffected by prescribed burns. Forest managers are increasingly embracing biodiversity enhancement as a management goal to improve ecosystem adaptation potential and this project provides new data and analysis to forest managers working with mixedwood species assemblages. The understanding of disturbance and development patterns in mixedwood forests is essential to create forest management systems that enhance native forest diversity, maintain critical ecosystem functions, and promote resiliency while also being economically sustainable and socially responsible. In these forest management systems, tree harvesting and other operations are patterned after natural processes both of which modify the distribution of tree species over time. This project explores the hypothesis that intermediate-severity canopy disturbance and fire are critical processes essential to perpetuate desirable species assemblages. This project uses field measurements in different forest experimental plots to quantify (1) the impacts of intermediate-severity canopy disturbance on forest succession and development and (2) the effects of prescribed fire on forest ecosystem conditions. This research provides data and reports to forest managers and stakeholders vested in the ecological integrity of forest systems and managing forests in the context of future climate change.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.

由于气候变化改变了推动森林生长的生态条件，预计全球森林生态系统在下个世纪将面临越来越大的压力。据推测，含有多种植物物种的生物多样性森林比生物多样性较少的系统对干扰事件和森林胁迫具有更强的抵抗力和恢复力。但目前尚不清楚未来对森林系统的压力将如何影响不同类型森林的生物多样性。 该项目量化了中度风扰对橡树松混交林中森林演替和短叶松社区发展的影响。该项目还记录了规定火灾对以前未受规定烧伤影响的短叶松为主的橡树松混交林的影响。森林管理者越来越多地将增强生物多样性作为提高生态系统适应潜力的管理目标，该项目为处理混合木树种组合的森林管理者提供了新的数据和分析。了解混交林的干扰和发展模式对于创建森林管理系统至关重要，该系统可以增强原生森林多样性，维持关键的生态系统功能并提高恢复能力，同时具有经济可持续性和社会责任感。在这些森林管理系统中，树木采伐和其他作业都是按照自然过程进行的，这两种过程都会随着时间的推移改变树种的分布。该项目探讨了这样一个假设：中度严重的树冠扰动和火灾是维持理想物种组合所必需的关键过程。该项目利用不同森林试验地的实地测量来量化（1）中度树冠干扰对森林演替和发展的影响以及（2）规定火灾对森林生态系统条件的影响。这项研究为森林管理者和利益相关者提供数据和报告，致力于森林系统的生态完整性以及未来气候变化背景下的森林管理。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值进行评估，被认为值得支持以及更广泛的影响审查标准。

项目成果

Intermediate-severity disturbance impacts in a mixedwood forest: A multi-scale analysis

混交林中的中度干扰影响：多尺度分析

• DOI: 10.1016/j.foreco.2022.120582
• 发表时间: 2022
• 期刊: Forest Ecology and Management
• 影响因子: 3.7
• 作者: Davis Goode, J.;Narayanan, Anuska;Phillips, David L.;Hart, Justin L.;Torreano, Scott J.;Dey, Daniel C.
• 通讯作者: Dey, Daniel C.