Shortgrass Steppe site, station Weld County, CO (FIPS 8123), study of population (urban) in units of number on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Shortgrass Steppe (SGS) contains population (urban) measurements in number units and were aggregated to a yearly timescale.EcoTrends项目（EcoTrends）于2004年由黛布拉·彼得斯博士（约纳达盆地长期生态研究站，Jornada Basin LTER；美国农业部农业研究服务局约纳达试验牧场，USDA-ARS Jornada Experimental Range）与阿里尔·卢戈博士（卢奎洛长期生态研究站，Luquillo LTER；美国农业部林务局卢奎洛试验林，USDA-FS Luquillo Experimental Forest）发起设立，旨在支撑长期生态数据集的采集与分析工作。本项目为大型综合研究计划，核心目标是提升长期生态数据的可获取性与应用效率。目前，共有约50个州级与联邦资助的科研站点参与并为EcoTrends项目贡献数据，其中涵盖全部26个长期生态研究（Long-Term Ecological Research, LTER）站点，以及由美国农业部农业研究服务局（Agricultural Research Service, ARS）、美国农业部林务局（Forest Service, FS）、美国能源部、美国地质调查局（United States Geological Survey, USGS）与众多高校资助的科研站点。EcoTrends项目的数据可通过探索型网络门户（http://www.ecotrends.info）获取。该门户通过交互式网络应用程序，为用户提供持续的数据汇编与数据获取服务。作为LTER溯源感知综合跟踪架构（Provenance Aware Synthesis Tracking Architecture, PASTA）的组成部分，正在进行的数据汇编工作将通过人工与自动两种处理机制完成更新。该网络门户是约纳达盆地LTER与LTER网络办公室的合作成果。本次来自短草草原（Shortgrass Steppe, SGS）的数据集包含以数值为单位的城镇种群测量数据，并已聚合至年时间尺度。