Cedar Creek Ecosystem Science Reserve site, station Old Field 24 at Cedar Creek, study of plant cover of Quercus 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 Cedar Creek Ecosystem Science Reserve (CDR) contains plant cover of Quercus measurements in percent units and were aggregated to a yearly timescale.

EcoTrends项目于2004年由黛布拉·彼得斯博士（乔纳达盆地长期生态研究站点（Jornada Basin LTER），美国农业部（United States Department of Agriculture, USDA）农业研究服务局乔纳达实验牧场）与阿里尔·卢戈博士（卢奎洛长期生态研究站点（Luquillo LTER），美国农业部（United States Department of Agriculture, USDA）林业局卢奎洛实验林）创立，旨在支撑长期生态数据集的采集与分析工作。该项目为大型综合研究项目，核心目标是提升长期生态数据的可获取性与应用水平。目前，约有50个州级及联邦资助的研究站点参与并为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）、林业局、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访问操作。日常的数据汇编更新工作将结合手动与自动处理流程完成，该流程作为LTER溯源感知综合跟踪架构（Provenance Aware Synthesis Tracking Architecture, PASTA）的组成部分运行。本网络门户由乔纳达LTER站点与LTER网络办公室联合开发。本数据集源自雪松溪生态科学保护区（Cedar Creek Ecosystem Science Reserve, CDR），包含以百分比为单位的栎属（Quercus）植物盖度实测数据，且已按年度时间尺度进行聚合。