H. J. Andrews Experimental Forest site, station Andrews Watershed 3, study of plant cover of Agoseris 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 Agoseris measurements in percent units
and were aggregated to a yearly timescale.

EcoTrends项目由德布拉·彼得斯博士（霍德内特盆地长期生态研究（Long-Term Ecological Research, LTER）、美国农业部农业研究局（USDA Agricultural Research Service, ARS）霍德内特试验牧场）与阿里尔·卢戈博士（卢奎洛长期生态研究（Long-Term Ecological Research, LTER）、美国农业部森林局卢奎洛试验林）于2004年创立，旨在支持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复用性。目前已有约50个州政府及联邦资助的研究站点参与EcoTrends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局、美国农业部森林局、美国能源部、美国地质调查局（United States Geological Survey, USGS）资助的站点与众多高校站点。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访问工作。作为LTER溯源感知综合跟踪架构（Provenance Aware Synthesis Tracking Architecture, PASTA）的组成部分，持续更新的数据汇编工作通过人工与自动两种处理方式完成。本网络门户由霍德内特LTER与LTER网络办公室合作开发。以下来自H·J·安德鲁斯试验林（H. J. Andrews Experimental Forest, AND）的数据集，包含以百分比为单位的山柳菊属（Agoseris）植物盖度测量数据，且已按年度时间尺度进行聚合。