Cedar Creek Ecosystem Science Reserve site, station Old Field 72 at Cedar Creek, study of plant cover of Carex muehlenbergii 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 Carex muehlenbergii measurements in percent units and were aggregated to a yearly timescale.EcoTrends项目（EcoTrends project）于2004年由德布拉·彼得斯博士（Dr. Debra Peters，乔达纳盆地长期生态研究站[Jornada Basin LTER]，美国农业部农业研究服务局乔达纳实验牧场[USDA-ARS Jornada Experimental Range]）与阿里尔·卢戈博士（Dr. Ariel Lugo，卢奎洛长期生态研究站[Luquillo LTER]，美国农业部林务局卢奎洛实验森林[USDA-FS Luquillo Experimental Forest]）创立，旨在支撑长期生态数据集的采集与分析工作。本项目属于一项大型综合研究工作，核心目标为提升长期数据的可获取性与应用水平。目前，共有约50个由州政府与联邦政府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，以及由美国农业部农业研究服务局（USDA Agriculture Research Service, ARS）、美国农业部林务局（USDA Forest Service）、美国能源部（US Department of Energy）、美国地质调查局（US Geological Survey, USGS）及众多高校资助的站点。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络应用程序，支持用户持续开展数据汇编与数据获取工作。作为长期生态研究站溯源感知综合跟踪架构（LTER 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。本网络门户由乔达纳长期生态研究站与长期生态研究站网络办公室合作开发。以下来自雪松溪生态系统科学保护区（Cedar Creek Ecosystem Science Reserve, CDR）的数据集，包含以百分比为单位的穆伦贝格苔草（Carex muehlenbergii）盖度测量数据，且已按年际时间尺度进行聚合。