Cedar Creek Ecosystem Science Reserve site, station Old Field 5 at Cedar Creek, study of plant biomass of Crepis tectorum in units of gramsPerSquareMeter 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 biomass of Crepis tectorum measurements in gramsPerSquareMeter units
and were aggregated to a yearly timescale.

EcoTrends项目由黛布拉·彼得斯博士（约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约纳实验牧场（USDA-ARS Jornada Experimental Range））与阿里尔·卢戈博士（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））于2004年创立，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应用价值。目前已有约50个由州政府及联邦机构资助的研究站点参与并为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）、美国农业部林务局、美国能源部、美国地质调查局（USGS）及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Web应用程序，支持用户持续开展数据汇编与数据获取工作。作为长期生态研究网络溯源感知综合跟踪架构（LTER Provenance Aware Synthesis Tracking Architecture, PASTA）的组成部分，持续进行的数据汇编工作通过手动与自动两种处理方式完成更新。该网络门户由约纳LTER站点与LTER网络办公室联合开发运营。本数据集取自雪松溪生态系统科学保护区（Cedar Creek Ecosystem Science Reserve, CDR），包含以克/平方米为单位的还阳参（Crepis tectorum）植物生物量实测数据，且已按年度时间尺度进行聚合。