Community structure, life-history traits and performance traits of urban cavity-nesting bees annd wasps

Background
Urban ecosystems are associated with socio-ecological conditions that can filter and promote taxa. However, the strength of the effect of ecological filtering on biodiversity could vary among biotic and abiotic factors. Here, we provide the data used to investigate the effects of habitat amount, temperature, and host-enemy biotic interactions in shaping communities of cavity-nesting bees and wasps (CNBW) and their natural enemies. To do so, we installed trap-nests in 80 sites distributed along urban intensity gradients in 5 European cities (Antwerp, Paris, Poznan, Tartu and Zurich). We quantified the species richness and abundance of CNBW hosts and their natural enemies, as well as two performance traits (survival and parasitism) and two life-history traits (sex ratio and number of offspring per nest for the hosts).
The dataset contains:
* The taxonomic metrics on CNBW
* The taxonomic metrics on the natural enemies from CNBW
* The life-history traits and performance traits

研究背景
城市生态系统与可对生物类群进行筛选并促进其存续的社会生态条件紧密关联。然而，生态过滤作用对生物多样性的影响强度会因生物与非生物因子的差异而有所不同。本研究提供了用于探究栖息地面积、温度以及宿主-天敌生物交互作用如何塑造洞栖蜂类与胡蜂（cavity-nesting bees and wasps，CNBW）及其天敌群落的数据集。
为开展此项研究，团队在5座欧洲城市（安特卫普、巴黎、波兹南、塔尔图与苏黎世）内沿城市强度梯度布设的80个样点中安装了诱捕巢。研究人员量化了洞栖蜂类与胡蜂宿主及其天敌的物种丰富度和个体多度，同时测定了两类性能性状（存活率与寄生率）以及两类生活史性状（宿主的性比与单巢后代数量）。

本数据集包含：
* 洞栖蜂类与胡蜂的分类学指标
* 洞栖蜂类与胡蜂天敌的分类学指标
* 生活史性状与性能性状