在被火灾破坏的北方森林景观中,中掠食性动物栖息地的季节性模式

IF 2.9 3区 环境科学与生态学 Q2 ECOLOGY
Ecosphere Pub Date : 2025-08-05 DOI:10.1002/ecs2.70357
Derek A. Arnold, Greg A. Breed, Jared S. Laufenberg, Nathan D. Berg, Mark R. Bertram, Bradley D. Scotton, Knut Kielland
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引用次数: 0

摘要

野火是北美寒带地区最具影响力的扰动形式,它驱动着整个地区的森林结构和组成。最近的气候模型预测,火灾强度和频率的增加将导致从针叶林为主的森林转变为落叶物种占主导地位的森林。我们研究了北方系统的标志性捕食者加拿大猞猁(lynx canadensis)如何通过一系列烧伤疤痕(4-73岁)移动。利用4 h固定速率的GPS项圈,我们对山猫在火灾后80年的运动进行了综合阶梯选择模型的拟合,以评估落叶林和针叶林的栖息地选择。我们预测猞猁将主要选择中龄云杉和年轻的落叶林,这反映了先前对其主要猎物雪靴兔(Lepus americanus)栖息地选择的研究。然而,我们发现,在两种森林类型中,猞猁的栖息地选择在中龄林分达到高峰,在冬季选择较年轻的落叶林分。针叶林没有季节变化,因为它们在不同季节的覆盖度变化很小。我们假设猞猁会选择最大捕获概率的栖息地,而不是野兔密度最高的栖息地。总之,这些结果表明,猞猁可以适应向中年林分的短期转变。然而,从长期来看,这些好处可能会减少,因为回火间隔的减少可能会减少中年林分的流行。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Seasonal patterns of habitat use by a mesopredator in boreal forest landscapes fragmented by fire

Seasonal patterns of habitat use by a mesopredator in boreal forest landscapes fragmented by fire

Seasonal patterns of habitat use by a mesopredator in boreal forest landscapes fragmented by fire

Seasonal patterns of habitat use by a mesopredator in boreal forest landscapes fragmented by fire

Seasonal patterns of habitat use by a mesopredator in boreal forest landscapes fragmented by fire

Seasonal patterns of habitat use by a mesopredator in boreal forest landscapes fragmented by fire

Wildfire is the most impactful disturbance regime in the North American boreal region, driving the structure and composition of forests across the region. Recent climate models predict that increasing fire intensity and frequency will result in a shift from a largely coniferous forest to one with a greater dominance by deciduous species. We investigated how an iconic predator of the boreal system, the Canada lynx (Lynx canadensis), moves through a range of burn scars (4–73 years old). Using GPS collars at 4-h fix rates, we fitted integrated step selection models to lynx movements across an 80-year post-fire chronosequence to assess habitat selection in both deciduous and coniferous forests. We predicted that lynx would primarily select intermediately aged spruce and young deciduous stands, mirroring previous research on the habitat selection of their main prey, snowshoe hares (Lepus americanus). We found, however, that lynx habitat selection peaked at intermediately aged stands in both forest types, with selection for younger deciduous stands in the winter months. There was no seasonal change in coniferous stands as they experience little change in cover across seasons. We hypothesize that lynx select for habitats that maximize capture probability as opposed to simply habitats with the highest hare density. Together, these results show that lynx can be resilient to short-term shifts toward intermediate-aged stands. However, these benefits will likely diminish in the longer term as the decrease in fire return interval may reduce the prevalence of intermediate-aged stands.

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来源期刊
Ecosphere
Ecosphere ECOLOGY-
CiteScore
4.70
自引率
3.70%
发文量
378
审稿时长
15 weeks
期刊介绍: The scope of Ecosphere is as broad as the science of ecology itself. The journal welcomes submissions from all sub-disciplines of ecological science, as well as interdisciplinary studies relating to ecology. The journal''s goal is to provide a rapid-publication, online-only, open-access alternative to ESA''s other journals, while maintaining the rigorous standards of peer review for which ESA publications are renowned.
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