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Fine‐scale habitat selection by sympatric Canada lynx and bobcat

机译:Sympatric Canada Lynx和Bobcat的精细栖息地选择

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The Canada lynx (Lynx canadensis) and the bobcat (Lynx rufus) are closely related species with overlap at their range peripheries, but the factors that limit each species and the interactions between them are not well understood. Habitat selection is a hierarchical process, in which selection at higher orders (geographic range, home range) may constrain selection at lower orders (within the home range). Habitat selection at a very fine scale within the home range has been less studied for both lynx and bobcat compared to selection at broader spatiotemporal scales. To compare this fourth‐order habitat selection by the two species in an area of sympatry, we tracked lynx and bobcat during the winters of 2017 and 2018 on the north shore of Lake Huron, Ontario. We found that both lynx and bobcat selected shallower snow, higher snowshoe hare abundance, and higher amounts of coniferous forest at the fourth order. However, the two species were spatially segregated at the second order, and lynx were found in areas with deeper snow, more snowshoe hare, and more coniferous forest. Taken together, our findings demonstrate that the lynx and bobcat select different resources at the second order, assorting along an environmental gradient in the study area, and that competition is unlikely to be occurring between the two species at finer scales.
机译:加拿大Lynx(Lynx Canadensis)和Bobcat(Lynx Rufus)是密切相关的物种,其范围周边重叠,但限制每个物种和它们之间的相互作用的因素并不顺利。栖息地选择是一个分层过程,其中在更高的订单(地理范围,家庭范围)下选择可以在较低的订单(在家庭范围内)约束选择。与在更广泛的时空秤上的选择相比,Lynx和Bobcat的栖息地选择在家庭范围内的非常精细的尺度。为了将这两个物种在一个Sympatry领域进行比较,我们在2017年和2018年冬天的赫尔尔湖,安大略湖北岸的冬季跟踪了Lynx和Bobcat的第四阶栖息地。我们发现,Lynx和Bobcat都选择了较浅的雪,更高的雪兔般的野兔丰富,以及第四顺序的高量针叶林。然而,这两个物种在第二阶的空间上隔离,在深处雪,更多的雪兔野兔和更多针叶林的地区发现了Lynx。我们的研究结果表明,Lynx和Bobcat在二阶中选择了不同的资源,沿着研究区域的环境梯度划分,并且在粮食尺度上的两个物种之间不太可能发生竞争。

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