Simulating fuel management for protecting regional biodiversity under climate change.

IF 8 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
Erica Marshall, Jessica L Keem, Trent D Penman, Julian Di Stefano
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Abstract

Climate change is resulting in larger, more frequent, and more severe wildfires which have increasingly negative impacts on people and the environment. Under these circumstances, it is critical to determine whether fire management actions can mitigate biodiversity impacts under future fire regimes. However, it is currently unclear how changing climate and management interact to influence the spatial distribution of risks to biodiversity. We used fire simulations to quantify the influence of 13 fuel management strategies on animal biodiversity in the Otways, southeastern Australia, under four alternative climate scenarios. Our management strategies include combinations of prescribed burning, mulching, and strategic fuel breaks modelled in various spatial configurations and frequencies. We assessed the capacity of treatments to reduce risk of fire to animal biodiversity by quantifying changes to extent burnt, wildfire frequency and wildfire severity. All management strategies reduced the average annual area burnt across the landscape, however, there was considerable variability over time and under different climate models. Similarly, spatial shifts in fire frequency and severity in some cases resulted in the shifting of fires away from some areas of high value to animals. There is no one size fits all management strategy for reducing impacts to biodiversity under variable future climates. However, all the strategies tested here reduced median impacts relative to a do-nothing approach for at least some aspects of the fire regime or for animal biodiversity. We highlight the importance of evaluating fire management effectiveness against a range of metrics to ensure multiple objectives are met under the increasingly unknown climate conditions we can expect going forward.

模拟气候变化下保护区域生物多样性的燃料管理。
气候变化正在导致更大、更频繁和更严重的野火,对人类和环境造成越来越大的负面影响。在这种情况下,确定火灾管理行动能否减轻未来火灾制度对生物多样性的影响至关重要。然而,目前还不清楚不断变化的气候和管理如何相互作用,影响生物多样性风险的空间分布。我们利用火灾模拟来量化澳大利亚东南部奥特维斯地区在四种可选气候情景下 13 种燃料管理策略对动物生物多样性的影响。我们的管理策略包括以不同空间配置和频率模拟的规定焚烧、覆盖和战略性燃料断裂的组合。我们通过量化燃烧范围、野火频率和野火严重程度的变化,评估了各种处理方法降低火灾对动物生物多样性风险的能力。所有的管理策略都减少了整个地貌的年平均烧毁面积,但随着时间的推移和在不同气候模型下的变化很大。同样,在某些情况下,火灾频率和严重程度的空间变化导致火灾远离一些对动物具有高价值的区域。在未来多变的气候条件下,要减少对生物多样性的影响,没有放之四海而皆准的管理策略。不过,与什么都不做的方法相比,这里测试的所有策略至少在火灾机制或动物生物多样性的某些方面减少了影响的中位数。我们强调了根据一系列指标评估火灾管理有效性的重要性,以确保在我们可以预期的未来越来越未知的气候条件下实现多重目标。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Environmental Management
Journal of Environmental Management 环境科学-环境科学
CiteScore
13.70
自引率
5.70%
发文量
2477
审稿时长
84 days
期刊介绍: The Journal of Environmental Management is a journal for the publication of peer reviewed, original research for all aspects of management and the managed use of the environment, both natural and man-made.Critical review articles are also welcome; submission of these is strongly encouraged.
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