Shortgrass Steppe site, station Moderately grazed pasture at Central Plains Experimental Range, study of aboveground net primary productivity in units of gramsPerMeterSquaredPerYear 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 aboveground net primary productivity measurements in gramsPerMeterSquaredPerYear units
and were aggregated to a yearly timescale.

EcoTrends项目由德布拉·彼得斯博士（约拿盆地长期生态研究网Jornada Basin LTER，美国农业部农业研究局约拿实验牧场）与阿里尔·卢戈博士（卢奎洛长期生态研究网Luquillo LTER，美国农业部林业局卢奎洛实验林）于2004年发起创立，旨在支撑长期生态数据集的采集与分析工作。该项目属于大型综合研究计划，核心聚焦于提升长期生态数据的可访问性与应用价值。目前共有约50个州级及联邦资助的研究站点参与EcoTrends项目并贡献数据，其中包含全部26个长期生态研究（Long-Term Ecological Research, LTER）站点，以及美国农业部农业研究局（Agricultural Research Service, ARS）、美国农业部林业局、美国能源部、美国地质调查局（United States Geological Survey, USGS）资助的站点，另有多所高校参与其中。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共享工作。作为长期生态研究网溯源感知综合跟踪架构（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模式进行更新。本网络门户由约拿LTER与LTER网络办公室联合开发。本次提供的短草草原（Shortgrass Steppe, SGS）数据集包含以克每平方米每年为单位的地上净初级生产力测量值，且已聚合至年度时间尺度。