Loch Vale Watershed Research Project site, station Andrews Creek at Loch Vale Watershed, study of ammonium streamwater export in units of kilogramsPerHectarePerYear 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 Loch Vale Watershed Research Project (LVW) contains ammonium streamwater export measurements in kilogramsPerHectarePerYear units and were aggregated to a yearly timescale.EcoTrends项目由Debra Peters博士（约那盆地长期生态研究站（Long-Term Ecological Research, LTER），美国农业部农业研究服务局（USDA-ARS）约那实验牧场）与Ariel Lugo博士（卢奎略长期生态研究站（Long-Term Ecological Research, LTER），美国农业部森林服务局卢奎略实验森林）于2004年创立，旨在支撑长期生态数据集的采集与分析工作。该项目是一项大型综合研究项目，核心目标为提升长期生态数据的可获取性与使用效率。目前已有约50个由州政府与联邦政府资助的研究站点参与并向EcoTrends项目贡献数据，其中包含全部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（USDA-ARS）、美国农业部森林服务局、美国能源部、美国地质调查局（USGS）与众多高校资助的相关站点。EcoTrends项目的数据可通过探索性网络门户（http://www.ecotrends.info）获取。该网络门户依托交互式网页应用，支持用户持续开展数据汇编与数据获取工作。作为长期生态研究溯源感知综合跟踪架构（Provenance Aware Synthesis Tracking Architecture, PASTA）的组成部分，持续推进的数据汇编工作通过手动与自动两种处理方式完成更新。该网络门户是约那LTER与LTER网络办公室的合作成果。以下来自洛奇谷流域研究项目（LVW）的数据集，包含以千克每公顷每年为单位的溪流铵盐输出量实测数据，且已按年度时间尺度完成聚合。