Impact of tree species composition on fire resistance in temperate forest stands

IF 3.7 2区农林科学 Q1 FORESTRY

Forest Ecology and Management Pub Date : 2024-09-13 DOI:10.1016/j.foreco.2024.122279

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Abstract

Numerous factors influence the frequency and intensity of forest fires. Forest fire damage and recovery are influenced by the species composition of the forests. This study assessed forest fire damage vulnerability and forest fire resistance according to the species composition of the forest stand (i.e., the proportion of needle leaf trees (NTs) versus broadleaved trees (BTs) within the forest stand). Following a forest fire event in South Korea, fire damage severity was determined by comparing the pre- and post-event normalized burn ratio obtained from Sentinel-2 imagery. In addition, using 3 m PlanetScope images, we were able to quantify (1) the species composition between NTs and BTs within 30 m of Sentinel-2 pixels and (2) the extent of fire damage and recovery based on changes in phenological timing events and the vegetation index. The results showed that the NT-dominated forest stands underwent more fire damage than the BT-dominated stands, and the differences increased with increasing fire severity. In NT-dominated forest stands, an increase in BT proportion led to a decrease in fire damage, whereas in BT-dominated forest stands, no such correlations were observed. Furthermore, the NT-dominated stands showed more delayed phenological events at the beginning and end of the growing season than the BT-dominated stands, implying slow post-fire recovery in the NT-dominated stands. Our results showed differences in fire damage vulnerability and recovery depending on species composition and demonstrated that the increased fire resistance of BT could improve the fire resistance of a forest stand. These results suggest that considering tree species biodiversity is critical for restoring fire-damaged areas, particularly in the context of climate change, where wildfire frequency is expected to increase.

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树种组成对温带林分防火能力的影响

影响森林火灾频率和强度的因素很多。森林火灾的损害和恢复受到森林物种组成的影响。本研究根据林分的物种组成（即林分中针叶树（NTs）与阔叶树（BTs）的比例）评估了森林火灾损害的脆弱性和森林火灾的抵抗力。韩国发生森林火灾后，通过比较哨兵-2 图像获得的火灾前后归一化燃烧比，确定了火灾的严重程度。此外，利用 3 m PlanetScope 图像，我们还能够量化：（1）Sentinel-2 像素 30 m 范围内的 NT 和 BT 之间的物种组成；（2）基于物候时序事件和植被指数变化的火灾损害和恢复程度。结果表明，NT为主的林分比BT为主的林分遭受了更多的火灾破坏，而且随着火灾严重程度的增加，差异也在增大。在NT为主的林分中，BT比例的增加导致火灾损失的减少，而在BT为主的林分中，没有观察到这种相关性。此外，与 BT 林分相比，NT 林分在生长季节开始和结束时表现出更多的物候延迟现象，这意味着 NT 林分在火灾后恢复缓慢。我们的研究结果表明，树种组成不同，火害的易损性和恢复能力也不同，并证明 BT 抗火性的增强可提高林分的抗火能力。这些结果表明，考虑树种的生物多样性对于恢复受火灾破坏的地区至关重要，尤其是在气候变化的背景下，野火频率预计会增加。

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来源期刊

Forest Ecology and Management 农林科学-林学

CiteScore

7.50

自引率

10.80%

发文量

665

审稿时长

39 days

期刊介绍： Forest Ecology and Management publishes scientific articles linking forest ecology with forest management, focusing on the application of biological, ecological and social knowledge to the management and conservation of plantations and natural forests. The scope of the journal includes all forest ecosystems of the world. A peer-review process ensures the quality and international interest of the manuscripts accepted for publication. The journal encourages communication between scientists in disparate fields who share a common interest in ecology and forest management, bridging the gap between research workers and forest managers. We encourage submission of papers that will have the strongest interest and value to the Journal''s international readership. Some key features of papers with strong interest include: 1. Clear connections between the ecology and management of forests; 2. Novel ideas or approaches to important challenges in forest ecology and management; 3. Studies that address a population of interest beyond the scale of single research sites, Three key points in the design of forest experiments, Forest Ecology and Management 255 (2008) 2022-2023); 4. Review Articles on timely, important topics. Authors are welcome to contact one of the editors to discuss the suitability of a potential review manuscript. The Journal encourages proposals for special issues examining important areas of forest ecology and management. Potential guest editors should contact any of the Editors to begin discussions about topics, potential papers, and other details.