干扰历史对亚高山冷杉衰退的影响有限

IF 3.7 2区 农林科学 Q1 FORESTRY
Niko J. Tutland , Olivia Santiago , Thomas R. Heydman , Kyle C. Rodman , Sarah J. Hart
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引用次数: 0

摘要

在北美西部的针叶林中,包括野火和多种本地树皮甲虫爆发在内的干扰定期导致树木大面积死亡,其遗产可以持续数十年。过去的干扰可以影响未来干扰的发生或严重程度,造成森林轨迹的长期变化。尽管它们很重要,但干扰之间相互作用的原因和后果,特别是树皮甲虫的相互作用,人们知之甚少。在一项包括野外和地理空间数据的多尺度研究中,我们探讨了不同干扰的遗产如何影响最近(1999-2019)西部苦荞皮甲虫(Dryocoetes confusus)和相关真菌病原体爆发的亚高山冷杉(Abies lasiocarpa)衰退(SFD)的未来发生和严重程度。我们收集了美国白河国家森林27个站点的林分结构和SFD的野外数据,这些站点经历了大约1879年的林分替换火灾和20世纪40年代严重的云杉甲虫(SB)爆发,留下了不同的干扰历史,这些干扰历史可能影响最近的SFD。在景观尺度上,SFD的发生在大约1879年经历过换林火灾的年轻森林中最为常见。在发生林分溃疡病的林分尺度上,林分溃疡病的严重程度不受扰动历史和林分结构的影响,而受地形的影响。对于单个树,我们发现对SFD的易感性与树的大小和与其他SFD受影响的树的接近程度密切相关,尽管1940 SB的存在具有较小的负面影响。尽管我们的研究结果广泛支持了先前关于森林退化动力学的研究,但扰动历史与森林退化之间的微弱联系强调了扰动后森林恢复的可变性,这突出了未来研究的必要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Disturbance history has limited influence on subalpine fir decline
In conifer forests of western North America, disturbances including wildfire and outbreaks of multiple species of native bark beetles periodically cause widespread tree mortality, the legacies of which can last decades. Past disturbances can influence the occurrence or severity of future disturbances, causing long-term changes in forest trajectories. Despite their importance, the causes and consequences of interactions among disturbances, especially bark beetle interactions, are poorly understood. In a multi-scale study including both field and geospatial data, we explored how legacies of different disturbances affected future occurrence and severity of subalpine fir (Abies lasiocarpa) decline (SFD) from recent (1999–2019) outbreaks of the western balsam bark beetle (Dryocoetes confusus) and associated fungal pathogens. We collected field data on stand structure and SFD at 27 sites in the White River National Forest, CO, USA, which experienced stand-replacing fires ca. 1879 and a severe spruce beetle (SB) outbreak in the 1940s, leaving a mosaic of different disturbance histories which might affect recent SFD. At the landscape scale, occurrence of SFD was most common in younger forests that had experienced stand-replacing fires ca. 1879. In forests with occurrence of SFD, stand-scale severity of SFD did not vary with disturbance history or stand structure, but was influenced by topography. For an individual tree, we found that susceptibility to SFD was most strongly associated with tree size and proximity to other SFD-affected trees, though presence of 1940s SB had a small, negative effect. Though our findings broadly support previous research on SFD dynamics, weak connections between disturbance history and SFD underscore the variability in forest recovery after disturbance, highlighting the need for future research.
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来源期刊
Forest Ecology and Management
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.
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