Revealing hidden species distribution with pheromones: the case of Synanthedon vespiformis (Lepidoptera: Sesiidae) in Sweden
Revealing hidden species distribution with pheromones: the case of Synanthedon vespiformis (Lepidoptera: Sesiidae) in Sweden
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DOI：
10.1007/s10841-015-9835-9
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发表时间：
2016-02-01
影响因子：
1.9
通讯作者：
Milberg, Per
中科院分区：
文献类型：
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作者：
Burman, Joseph;Westerberg, Lars;Milberg, Per
胡蜂花（鳞翅目：Sesiidae）被认为是一种罕见的昆虫在瑞典，发现于1860年，只有少数观察记录，直到最近的性信息素引诱剂成为可用。这项研究详细介绍了使用信息素作为该物种的抽样方法进行的全国性调查。通过信息素诱捕，我们在瑞典南部的77个地点捕获了439个标本，几乎是以前报道的该物种记录数量的三倍。结果表明，S.胡蜂是一种十分稀有的品种，分布十分分散，但在本地亦有很多。进行了生境分析，以测试生境质量和捕获的个体数量之间的关系。在瑞典，S. vespiformis被认为与橡树宿主有关，但我们试图通过橡树的丰富度来预测其发生，没有发现明显的关系。因此，我们认为，抽样偏差和有限的知识分布可能导致的假设，这是主要依赖于橡树在其范围的北方的一部分，而它实际上可能是多食性，类似于S。胡蜂是中欧和南欧的一种农业害虫。我们的结论是，信息素可以大大提高采样潜力，这和其他罕见的鳞翅目物种。大规模的信息素为基础的调查提供了一个快照的真实存在和不存在的相当一部分物种的国家分布范围，从而首次提供了一个可行的手段，系统地评估随着时间的推移，高时空分辨率的分布变化。
Synanthedon vespiformis L. (Lepidoptera: Sesiidae) is considered a rare insect in Sweden, discovered in 1860, with only a few observations recorded until a sex pheromone attractant became available recently. This study details a national survey conducted using pheromones as a sampling method for this species. Through pheromone trapping we captured 439 specimens in Southern Sweden at 77 sites, almost tripling the number of previously reported records for this species. The results suggest that S. vespiformis is truly a rare species with a genuinely scattered distribution, but can be locally abundant. Habitat analyses were conducted in order to test the relationship between habitat quality and the number of individuals caught. In Sweden, S. vespiformis is thought to be associated with oak hosts, but our attempts to predict its occurrence by the abundance of oaks yielded no significant relationships. We therefore suggest that sampling bias and limited knowledge on distribution may have led to the assumption that this species is primarily reliant on oaks in the northern part of its range, whereas it may in fact be polyphagous, similar to S. vespiformis found as an agricultural pest in Central and Southern Europe. We conclude that pheromones can massively enhance sampling potential for this and other rare lepidopteran species. Large-scale pheromone-based surveys provide a snapshot of true presences and absences across a considerable part of a species national distribution range, and thus for the first time provide a viable means of systematically assessing changes in distribution over time with high spatiotemporal resolution.