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首页> 外文期刊>Canadian Journal of Zoology >The influence of herbivores and neighboring plants on risk of browsing: acase study using arctic lupine (Lupinus arcticus) and arctic groundsquirrels (Spermophilus parryii plesius)
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The influence of herbivores and neighboring plants on risk of browsing: acase study using arctic lupine (Lupinus arcticus) and arctic groundsquirrels (Spermophilus parryii plesius)

机译：草食动物和邻近植物对浏览风险的影响：以北极羽扇豆（羽扇豆）和北极地松鼠（Spermophilus parryii plesius）为例的研究

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摘要

We examined how herbivore distribution and density, neighboring plant density and species composition, and individual plant morphology all influence the risk that individual arctic lupines (Lupinus arcticus) will be browsed by arctic ground squirrels (Spermophilus parryii plesius). Risk of being browsed was significantly influenced by the number of resident ground squirrels but not by overall squirrel density at a site. As the leaf density of neighboring conspecifics increased, risk of browsing to an individual lupine decreased except when palatable neighbors were also present. The presence of other palatable species increased the risk of browsing. Risk was highest when both lupine and other palatable neighbors were present. The presence of unpalatable neighbors reduced the risk of browsing of individual lupines. We discuss these results in the context of three hypotheses: (1) attractant decoy, (2) resource concentration, and (3) repellent plant. No single hypothesis accounts for our observations, but an interaction between herbivores, neighbors, and individual lupine morphology determined risk of browsing.
机译：我们研究了草食动物的分布和密度，邻近植物的密度和物种组成以及单个植物的形态如何影响单个北极羽扇豆（Lupinus arcticus）被北极地松鼠（Spermophilus parryii plesius）浏览的风险。居民地松鼠的数量会显着影响被浏览的风险，而现场的总松鼠密度则不会。随着邻近物种的叶密度增加，浏览单个羽扇豆的风险降低，除非也存在可口的邻居。其他可口物种的存在增加了浏览的风险。当羽扇豆和其他可口的邻居都存在时，风险最高。难吃的邻居的存在降低了浏览个别羽扇豆的风险。我们在三个假设的背景下讨论这些结果：（1）诱饵诱饵，（2）资源集中，以及（3）驱避植物。没有单一的假设可以解释我们的观察结果，但是草食动物，邻居和个体羽扇豆形态之间的相互作用决定了浏览的风险。

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