Shortgrass Steppe site, station Treatment 1 (control) for ESA study, study of plant density in units of numberPerMeterSquared 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 Shortgrass Steppe (SGS)
contains plant density measurements in numberPerMeterSquared units
and were aggregated to a yearly timescale.

EcoTrends项目由黛布拉·彼得斯博士（约纳达盆地长期生态研究站，美国农业部农业研究服务局约纳达实验牧场）与阿里尔·卢戈博士（卢奎洛长期生态研究站，美国农业部林务局卢奎洛实验森林）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。本项目属于大型综合研究项目，核心目标在于提升长期生态数据的可获取性与应用效率。目前已有约50个由州政府及联邦政府资助的研究站点参与并向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（USDA Agriculture Research Service, ARS）、美国农业部林务局、美国能源部、美国地质调查局（US Geological Survey, USGS）与众多高校资助的相关站点。EcoTrends项目的数据集可通过探索性网络门户（http://www.ecotrends.info）获取。该网络门户依托交互式Web应用程序，支持用户持续开展数据汇编与数据获取工作。作为可溯源综合跟踪架构（Provenance Aware Synthesis Tracking Architecture, PASTA）的组成部分，项目通过人工与自动结合的处理流程，对持续推进的数据汇编工作进行更新。本网络门户由约纳达LTER站点与LTER网络办公室合作开发。本次提供的短草草原（Shortgrass Steppe, SGS）数据集包含以每平方米数量为单位的植物密度测量值，且已按年度时间尺度完成聚合处理。