Soils deliver under‐recognized ecosystem services by supplying habitat for ground‐dwelling pollinators, such as wild bees and other organisms, that pollinate 80% of insect‐pollinated plants and play a critical role in securing resilient pollination provisions. Our objective is to identify soil properties of ground‐nesting bee nests in agricultural settings of western Oregon. We confirmed ground‐nesting bee and sand wasp activity in seven agricultural sites and one recreational park. Soils from 17 bee and sand wasp nests were analyzed for pH, particle size distribution, and carbon and nitrogen content. We visually confirmed that eight of the nesting bees were sweat bees from the Halictidae family and identified a captured bee specimen as Lasioglossum (Dialictus) (Hymenoptera: Halictidae). We located two sites with sand wasps where specimens were identified as Cerceris and Bembix (Hymenoptera: Crabronidae). The organic matter composition of three soil samples scraped from the linings of active nests was assessed using Fourier transform ion cyclotron resonance mass spectrometry (FTICR‐MS). The FTICR‐MS results identified unknown lipid compounds in the nest soil samples, which we hypothesize are waterproofing lipids secreted to line cell walls. Bee nests occurred in slightly acidic, bare‐ground soils with low rock/vegetation coverage and low organic carbon content (<1%) and exhibited significantly higher silt‐plus‐clay fractions (>80%) vs. data published for bee nests in prior work. Our findings present important implications for textural controls on nest site selection in wet, cool environments and demonstrate the importance of integrating soil properties to improve our understanding of ground‐dwelling organisms and associated soil habitats.

中文翻译：

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农业环境中地下蜂巢的土壤特性和生化成分

土壤通过为地面授粉媒介（例如野生蜜蜂和其他生物）提供栖息地来提供未被认可的生态系统服务，这些授粉媒介对80％的昆虫授粉植物进行授粉，并在确保弹性授粉规定中发挥关键作用。我们的目标是确定俄勒冈州西部农业环境中地面筑巢的蜂巢的土壤特性。我们确认了七个农业地点和一个休闲公园中的地面蜂和黄蜂活动。分析了来自17个蜂巢和黄蜂巢的土壤的pH值，粒度分布以及碳和氮含量。我们在视觉上证实，蜜蜂筑巢八人来自汗水蜜蜂集蜂科的家庭，并确定了拍摄的蜜蜂标本为Lasioglossum（Dialictus）（膜翅目：Halictidae）。我们在两个有黄蜂的地点找到了标本分别为cerceris和bembix（膜翅目：龟科））。使用傅立叶变换离子回旋共振质谱（FTICR-MS）评估了从活动巢壁上刮下的三个土壤样品的有机物组成。FTICR-MS结果鉴定出巢土样品中未知的脂质化合物，我们假设是分泌到细胞壁上的防水脂质。蜂巢发生在弱酸性，裸露的土壤中，岩石/植被覆盖率低，有机碳含量低（<1％），与泥土燕窝中发布的数据相比，其粉砂-粘土含量高得多（> 80％）。之前的工作。我们的发现对在潮湿，凉爽的环境中选择巢穴的质地控制提出了重要的建议，并表明了整合土壤特性对增进我们对地面生物和相关土壤生境的理解的重要性。