Forestry companies have replaced and fragmented the native landscapes, generating a large number of unpaved roads, which can have a negative effect on non-flying invertebrates. Polynoncus bullatus is a common necrophagous beetle species depend on fox scats present on unpaved roads in fragmented landscapes in central Chile. Here, the effect of different habitat types (native forest, clear-cuts and unpaved roads) on the abundance of Lycalopex culpaeus scats as well as abundance and survival of P. bullatus in the fragmented landscape was evaluated. Scats and beetles were counted in seven independent fragments during 6 months and through sampling transects. Both responses and factors were associated with GLM, whereas survival was evaluated with a Kaplan-Meier test. Higher scats abundance was found on unpaved roads than other habitat types. Higher P. bullatus abundance was also significantly associated with unpaved roads than clear-cuts and native forest fragments. An additive model between habitat type and scat abundance was correlated with beetle abundance. Survival was significantly lower in unpaved roads, generating up to 42 % of beetles road-killed. Lycalopex culpaeus response positively to fragmentation defecating more on unpaved roads because foxes use it to move through the landscape. This fact attracts more P. bullatus individuals, being run-over by cars and trucks, representing an ecological trap for beetles. This interaction can be predictable and modeled for any period, length or road type avoiding potential massive road-kill events.

Implications for insect conservation. Common and threatened invertebrate species are run-over when minor roads cross valuable natural or protected areas, evidencing the need of advance in road designs compatible with their conservation and mitigating negative impacts of forestry.

林业公司已经替换并分割了原始景观，产生了大量未铺砌的道路，这会对非飞行无脊椎动物产生负面影响。Bullnonus Bullatus是一种常见的食尸性甲虫物种，取决于智利中部零散景观中未铺砌道路上的狐狸粪便。在这里，不同的生境类型（天然森林，开阔的路段和未铺砌的道路）对鳞尾天牛（Lycalopex culpaeus scats）小虫的丰度以及大白僵菌（P. Bullatus）的丰度和生存的影响在零散的景观中进行了评估。在6个月内和通过采样样道，将粪便和甲虫计数为7个独立的片段。反应和因素均与GLM相关，而生存率则通过Kaplan-Meier检验进行评估。在未铺砌的道路上发现的粪便丰富度高于其他栖息地类型。与未砍伐的道路和原始森林碎片相比，未铺整的道路还与较高的大公牛丰富度有关。栖息地类型和粪便丰度之间的加性模型与甲虫丰度相关。在未铺砌的道路上，存活率明显降低，占道路被杀死的甲虫的42％。番荔枝对碎片的反应是积极的，在未铺砌的道路上粪便会更多，这是因为狐狸利用它在景观中穿行。这一事实吸引了更多的大公牛个体，他们被汽车和卡车撞倒，这代表了甲虫的生态陷阱。这种交互作用可以针对任何时期，长度或道路类型进行预测和建模，从而避免潜在的大规模道路交通事故。

对昆虫保护的启示。当次要道路穿越宝贵的自然或保护区时，常见且濒临灭绝的无脊椎动物物种将越过，这表明需要改进道路设计以适应其养护并减轻林业的负面影响。