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首页> 外文期刊>Forest Ecology and Management >Land ownership impacts post-wildfire forest regeneration in Sierra Nevada mixed-conifer forests
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Land ownership impacts post-wildfire forest regeneration in Sierra Nevada mixed-conifer forests

机译：土地所有权影响野火森林再生在塞拉尼达达森林森林中

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摘要

Understanding forest regeneration in the wake of large-scale wildfire events is critically important because these disturbances are expected to occur more frequently given future climate projections. While the impacts of individual management prescriptions on prevention, mitigation, and response to severe fire events have been studied, the influence of property ownership on their implementation and success has received less attention. The objective of this study was to compare how the management practices of two common US forestland owners-public (U.S. Forest Service) and a private forest resource company- influenced forest regeneration following a 26,000 ha wildfire in the northern Sierra Nevada. Spectral unmixing was used to track revegetation for 11 years following a 2007 wildfire. Classified vegetation maps were field validated and generated using remotely sensed imagery for the 2007 (pre-fire) and 2018 timepoints to track landcover transitions. Public ownership within the fire perimeter was the majority at 18,760 ha, while private ownership accounted for 7617 ha. Significant differences in forest regeneration were found with vegetation establishment on publicly owned lands occurring at twice the rate of their privately owned counterpart. However, by 2018 over half (10,062 ha) of publicly owned lands converted from forest (pre-fire) to a shrub-dominated land-cover type while only 2.2% (122 ha) of privately owned lands did so. Additionally, only 1% (249 ha) of publicly owned lands were characterized by young regenerating conifer forests, whereas approximately 70% (3875 ha) of privately owned lands were characterized as such. These results demonstrate a strong contrast in post-fire vegetation regeneration that will likely persist for many decades into the future. The implications of this contrast significantly impact the ecosystem services these forests provide, as well as future disturbance potential.
机译：在大规模的野火事件之后了解森林再生是至关重要的，因为这些干扰预计将更频繁地赋予未来的气候预测。虽然已经研究了个人管理处方对预防，减灾和反应严重火灾事件的影响，但物业所有权对其实施和成功的影响受到不太关注。本研究的目的是比较两个共同的美国林地所有者的管理实践如何 - 公共（美国森林服务）和私人森林资源公司影响森林再生后，在北部塞拉尼达达北部的26,000公顷的野火之后。光谱解波器用于跟踪2007野火后11年的再培养。分类植被图是验证和生成的现场，使用2007年（预火）和2018年的监视图像和2018年的时间点来跟踪Landcover转换。火灾周边内的公共所有权是18,760公顷的大多数，而私人所有权占7617公顷。在私人所有对应率的两倍于占地两倍的公共土地上发现了森林再生的显着差异。然而，到2018年超过一半（10,062公顷）从森林（预火）转换为灌木主导的陆地覆盖类型，而只有2.2％（122公顷）的私有土地所做的。此外，只有1％（249公顷）的公有土地的特征是年轻再生针叶树林，而大约70％（3875公顷）的私营土地被描述。这些结果表明，火灾后植被再生中具有强烈对比，这可能持续数十年进入未来。这种对比的含义显着影响了这些森林提供的生态系统服务以及未来的扰动潜力。

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