H. J. Andrews Experimental Forest site, station Andrews Watershed 1, study of plant cover of Holcus in units of percent 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 H. J. Andrews Experimental Forest (AND) contains plant cover of Holcus measurements in percent units and were aggregated to a yearly timescale.

EcoTrends项目由黛布拉·彼得斯博士（约拿盆地长期生态研究站，美国农业部农业研究服务局约拿实验牧场）与阿里尔·卢戈博士（卢奎洛长期生态研究站，美国农业部林业局卢奎洛实验林）于2004年发起创立，旨在支撑长期生态数据集的收集与分析工作。该项目为大型综合数据整合研究计划，核心目标是提升长期生态数据的可获取性与应用价值。目前共有约50个州立及联邦资助的研究站点参与本项目并贡献数据，其中涵盖全部26个长期生态研究（Long-Term Ecological Research, LTER）站点，以及美国农业部农业研究服务局（ARS）、美国农业部林业局、美国能源部、美国地质调查局（USGS）和众多高校资助的研究站点。EcoTrends项目的数据集可通过探索性网络门户（http://www.ecotrends.info）获取。该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。作为长期生态研究网络溯源感知综合跟踪架构（PASTA）的组成部分，本项目的在研数据汇编工作通过手动与自动处理两种方式完成更新。该网络门户由约拿盆地LTER站与LTER网络办公室联合开发运营。以下来自H.J.安德鲁斯实验森林（AND）的数据集，包含以百分比为单位的绒毛草属（Holcus）植物覆盖度测量数据，且已聚合至年度时间尺度。