Species occurrence data from the Range-Wide Bull Trout eDNA Project

These data include 2015 - 2018 eDNA field sample points indicating lab results for presence or absence of bull trout. Sample sites are spaced at a 1 kilometer interval throughout the historical range of bull trout. eDNA stream samples are collected and species presence/absence is determined by analyses at the National Genomics Center. Results are recorded in the feature attribute table of the eDNA sample site shapefile. One point feature in the shapefile was generated for each 1 kilometer sample point in the bull trout eDNA feature class. Where multiple samples were collected at a single eDNA sample site, replicate point features will occur at a single location in the shapefile. The bull trout is an ESA-listed species with a historical range that encompasses many waters across the Northwest. Though once abundant, bull trout have declined in many locations and are at risk from a changing climate, nonnative species, and habitat degradation. Informed conservation planning relies on sound and precise information about the distribution of bull trout in thousands of streams, but gathering this information is a daunting and expensive task. To overcome this problem, we coupled 1) predictions from the range-wide, spatially precise Climate Shield model on the location of natal habitats of bull trout with 2) a sampling template for every 8-digit hydrologic unit in the historical range of bull trout, based on the probability of detecting bull trout presence using environmental DNA (eDNA) sampling (McKelvey et al. 2016). The template consists of a master set of geospatially referenced sampling locations at 1-kilometer intervals within each cold-water habitat. We also identified sampling locations at this same interval based on the U.S. Fish and Wildlife Service's (USFWS) designation of critical spawning and rearing habitat. Based on field tests of eDNA detection probabilities conducted by the National Genomics Center for Wildlife and Fish Conservation, this sampling approach will reliably determine the presence of populations of bull trout, as well as provide insights on non-spawning habitats used by adult and subadult fish. The completed bull trout eDNA survey results are available through an interactive ArcGIS Online Map. The map provides the ability to zoom in and look at an area of interest, as well as to create queries or select an area to download points as a shapefile.This record was taken from the USDA Enterprise Data Inventory that feeds into the https://data.gov catalog. Data for this record includes the following resources: ISO-19139 metadata ArcGIS Hub Dataset ArcGIS GeoService For complete information, please visit https://data.gov.

本数据集包含2015年至2018年的环境DNA(eDNA)野外采样点，其中记录了鲑鳟鱼的存在与否的实验室检测结果。采样点均匀分布在鲑鳟鱼历史分布范围的1公里间隔内。eDNA河流样本由国家基因组中心收集，并通过对样本进行检测来确定物种的存在与否。检测结果记录在eDNA采样点形状文件的属性表中。对于每个鲑鳟鱼eDNA特征类中的1公里采样点，在形状文件中生成一个点特征。当在同一eDNA采样点收集多个样本时，在形状文件的单个位置上会出现重复的点特征。鲑鳟鱼是美国鱼类和野生动物管理局(USFWS)列出的物种，其历史分布范围覆盖了西北地区众多水域。尽管曾经数量丰富，但鲑鳟鱼在许多地区数量已经减少，面临着气候变化、非本地物种入侵和栖息地退化的威胁。明智的保育规划依赖于关于鲑鳟鱼在数千条河流中分布的准确和可靠信息，而收集此类信息是一项艰巨且昂贵的任务。为了克服这一问题，我们结合了以下两个方面：1)基于对鲑鳟鱼产卵栖息地的全面、空间精确的气候盾牌模型预测；2)基于利用环境DNA(eDNA)采样检测鲑鳟鱼存在概率的历史分布范围内每个八位水文单元的采样模板（McKelvey等人，2016年）。该模板包含在每个冷水生境中按1公里间隔定位的地理空间参考采样点的母本集合。我们还在此间隔内确定了由美国鱼类和野生动物管理局(USFWS)指定的关键产卵和育幼栖息地采样点。基于国家野生动物和鱼类保守基因组中心进行的eDNA检测概率的实地测试，这种采样方法将可靠地确定鲑鳟鱼种群的存在，并提供有关成年和亚成鱼使用的非产卵栖息地的见解。完成的鲑鳟鱼eDNA调查结果可通过互动式的ArcGIS Online地图获取。该地图提供放大查看感兴趣区域、创建查询或选择区域下载点作为形状文件的功能。此记录摘自提供数据到https://data.gov目录的USDA企业数据清单。该记录的数据包括以下资源：ISO-19139元数据、ArcGIS Hub数据集、ArcGIS GeoService。如需完整信息，请访问https://data.gov。