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Determinants of vegetation regeneration on forest roads following restoration treatments: implications for boreal caribou conservation
Restoration Ecology ( IF 3.2 ) Pub Date : 2021-04-15 , DOI: 10.1111/rec.13414
Rebecca Lacerte 1 , Mathieu Leblond 2 , Martin‐Hugues St‐Laurent 3
Affiliation  

Linear features are increasing worldwide and, in many jurisdictions, their decommissioning has been identified as a way to restore wildlife habitat. Few studies have assessed restoration practices on forest roads, yet they are the main linear disturbance throughout most circumboreal forests. In boreal forests of eastern Canada, such knowledge would be especially valuable for the conservation of boreal populations of woodland caribou (Rangifer tarandus caribou). We assessed the short-term establishment of vegetation following four treatments applied across 40 km of forest roads, along a restoration gradient involving additive treatments (i.e. each successive treatment included the treatments prior): closing the road to traffic, decompacting the soil, planting black spruce trees, and adding enriched soil. We linked lateral cover (a proxy of movement obstruction for wildlife) and the occurrence and abundance of plant species to road treatments and environmental covariates. Vegetation establishment 3–4 years after decommissioning was mostly influenced by treatments but also by road width and stand composition in the vicinity of roads. The combination of closing, decompacting, and planting was the most effective treatment to establish regeneration that would lead to suitable caribou habitat as it reduced food availability for moose and bears (i.e. lower presence of herbaceous species, fruit-bearing shrubs, and deciduous trees). It also reduced the presence of plants competing with spruce, such as ericaceous shrubs. Our results suggest that the decommissioning of forest roads could benefit caribou, provided it is performed at a sufficiently broad scale, and accompanied by other habitat restoration and protection practices.

中文翻译:

恢复处理后林道植被再生的决定因素:对北方驯鹿保护的影响

线状特征在世界范围内不断增加,在许多司法管辖区,它们的退役已被确定为恢复野生动物栖息地的一种方式。很少有研究评估森林道路的恢复实践,但它们是大多数环北森林的主要线性干扰。在加拿大东部的北方森林中,这些知识对于保护北方林地驯鹿(Rangifer tarandus caribou)。我们评估了在 40 公里林道上应用四种处理后植被的短期建立,沿着涉及加法处理的恢复梯度(即每个连续处理包括之前的处理):关闭交通道路,解压土壤,种植黑色云杉树,并添加肥沃的土壤。我们将侧向覆盖(野生动物运动障碍的代表)和植物物种的出现和丰度与道路处理和环境协变量联系起来。退役后 3-4 年的植被建立主要受处理的影响,但也受道路宽度和道路附近林分组成的影响。关闭,解压缩的组合,种植是建立再生最有效的处理方法,这将导致合适的驯鹿栖息地,因为它减少了驼鹿和熊的食物供应(即草本物种、果树灌木和落叶树的数量减少)。它还减少了与云杉竞争的植物的存在,例如杜鹃花灌木。我们的研究结果表明,森林道路的退役可以使北美驯鹿受益,前提是它在足够广泛的范围内进行,并伴随着其他栖息地恢复和保护措施。
更新日期:2021-04-15
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