Data from: USBombus, Contemporary Survey Data of North American Bumble Bees (Hymenoptera, Apidae, Bombus) Distributed in the United States

USBombus is a large dataset that represents the outcomes of the largest standardized survey of bee pollinators (Hymenoptera, Apidae, Bombus) on the planet. The motivation to collect live bumble bees across the US was to document the decline and conservation status of Bombus affinis, B. occidentalis, B. pensylvanicus, and B. terricola. The results of study have been published Proceedings of the National Academy of Sciences as “Patterns of widespread decline in North American bumble bees” by Cameron et al. (2011). In this dataset we have documented a total of 17,796 adult occurrence records across 391 locations and 38 species of Bombus. The geospatial coverage of the dataset extends across 41 of the 50 US states and from 0 to 3500 m a.s.l. The temporal scale of the dataset represents systematic surveys that took place from 2007 to 2010. The dataset was developed using SQL server 2008 r2. For each specimen, the following information is generally provided: species name, sex, caste, temporal and geospatial details, Cartesian coordinates, data collector(s), and when available, host plants. This database has already proven useful for a variety of studies on bumble bee ecology and conservation. Considering the value of pollinators in agriculture and wild ecosystems, this large systematic collection of bumble bee occurrence records will likely prove useful in investigations into the effects of anthropogenic activities on pollinator community composition and conservation status. Resources in this dataset:Resource Title: Data from: USBombus, Contemporary Survey Data of North American Bumble Bees (Hymenoptera, Apidae, Bombus) Distributed in the United States (Data Dictionary). File Name: meta.xmlResource Description: This is the data dictionary for Data from: USBombus, Contemporary Survey Data of North American Bumble Bees (Hymenoptera, Apidae, Bombus) Distributed in the United States.Resource Title: USBombus, contemporary survey data of North American bumble bees (Hymenoptera, Apidae, Bombus) distributed in the United States (DWC Archive). File Name: dwca-usbombus-v2.11.zipResource Description: This is the Darwin Core Archive of USBombus, contemporary survey data of North American bumble bees (Hymenoptera, Apidae, Bombus) distributed in the United States.
The Darwin Core Archive is a zip file that contains three documents.

The occurrence data is stored in the occurrence.txt file.
The metadata that describes the columns of this document is called meta.xml. This document is also the data dictionary for this dataset.
The metadata that describes the dataset, including author and contact information for this dataset is called eml.xml.

USBombus乃全球最大规模标准化蜜蜂传粉者（膜翅目、蜜蜂科、 Bombus属）调查结果的大型数据集。收集全美活体黄蜂的动机在于记录 Bombus affinis、B. occidentalis、B. pensylvanicus及B. terricola的衰退状况与保护等级。该研究之成果已发表于《美国国家科学院院刊》中，由 Cameron等人于2011年发表的《北美蜜蜂广泛衰退的模式》。本数据集中，我们记录了总计17,796条成年个体出现记录，涵盖391个地点和38种Bombus属物种。数据集的地理空间覆盖范围横跨美国50个州中的41个，海拔高度从0至3500米。数据集的时间尺度代表了2007年至2010年间进行的系统性调查。该数据集采用SQL server 2008 r2开发。对于每个样本，通常提供以下信息：物种名称、性别、等级、时间和地理空间细节、笛卡尔坐标、数据收集者以及如有，宿主植物。此数据库已证明在多种关于蜜蜂生态与保护的研究中具有重要价值。鉴于传粉者在农业和野生生态系统中的价值，这一大规模系统性收集的黄蜂出现记录，在探究人类活动对传粉者群落组成和保护状况的影响研究中，预计也将发挥重要作用。数据集中包含的资源包括：

资源标题：数据来源：USBombus，北美蜜蜂（膜翅目、蜜蜂科、 Bombus属）当代调查数据，分布在美国（数据字典）。文件名：meta.xml
资源描述：这是数据来源：USBombus，北美蜜蜂（膜翅目、蜜蜂科、 Bombus属）当代调查数据，分布在美国的数据字典。

资源标题：USBombus，北美蜜蜂（膜翅目、蜜蜂科、 Bombus属）当代调查数据，分布在美国（DWC存档）。文件名：dwca-usbombus-v2.11.zip
资源描述：这是USBombus，北美蜜蜂（膜翅目、蜜蜂科、 Bombus属）当代调查数据，分布在美国的Darwin Core存档。该Darwin Core存档是一个包含三个文件的zip文件。

发生数据存储在occurrence.txt文件中。
描述该文档列的元数据称为meta.xml，此文档也是该数据集的数据字典。
描述数据集的元数据，包括数据集的作者和联系信息，称为eml.xml。