Data from: Gene flow across large distances in the cavity-nesting wasp Deuteragenia subintermedia in a central European forest

Habitat connectivity and maintaining gene flow between populations is
central for long term population persistence and is an essential element
in conservation planning. However, data on dispersal ability and genetic
population structure is lacking for almost all insect species. We here
investigate if forest localities in the temperate, central European Black
Forest are connected by gene flow. For this, we used partial genome
sequencing on specimens of the solitary cavity-nesting wasp Deuteragenia
subintermedia (Hymenoptera, Pompilidae), a forest specialist that is
primarily nesting in deadwood. We assumed that spatially uneven
availability of standing deadwood has led to genetic sub structuring.
Contrary to our expectations, we did not find signs of population
structure either on a regional or an individual level. Hence, for this
solitary wasp species, dispersal seems not to be restricted across the
Black Forest study sites (approximately 90 km distance) and none of the
investigated environmental variables impacted genetic connectivity.
 This study was part of the ‘Conservation of forest biodiversity
in multiple-use landscapes of Central Europe’ (ConFoBi) framework (Storch
et al., 2020). The ConFoBi project investigates how structural retention
forestry approaches in the southern Black Forest (Baden-Württemberg,
Germany) influences several aspects of biodiversity

生境连通性（habitat connectivity）与维持种群间基因流（gene flow），是种群长期存续的核心保障，亦是保护规划（conservation planning）的关键环节。然而，几乎所有昆虫类群的扩散能力（dispersal ability）与种群遗传结构（genetic population structure）相关数据均存在显著缺失。
本研究旨在探究欧洲中部温带黑森林内的各森林样地是否通过基因流实现连通。为此，我们针对独居树洞筑巢胡蜂物种暗足异跗蛛蜂（Deuteragenia subintermedia，膜翅目Hymenoptera，蛛蜂科Pompilidae）的标本开展了部分基因组测序。该物种为森林专性类群，主要以枯木（deadwood）作为筑巢基质。我们曾推测，站立枯木的空间分布不均会引发种群遗传亚结构（genetic sub structuring）的形成。
但与预期相悖，无论是区域尺度还是个体尺度上，我们均未检测到种群遗传结构的相关信号。由此可见，该独居胡蜂的扩散能力并未受到本次研究样地（跨度约90公里）的限制，且所有被调查的环境变量（environmental variables）均未对遗传连通性（genetic connectivity）产生显著影响。
本研究隶属于"中欧多用途景观中的森林生物多样性保护（Conservation of forest biodiversity in multiple-use landscapes of Central Europe，简称ConFoBi）"研究框架（Storch等，2020）。ConFoBi项目旨在探究德国巴登-符腾堡州黑森林南部的结构保留林业（structural retention forestry）模式，会对生物多样性的多个维度产生何种影响。