Shortgrass Steppe site, station ESA Control 1, 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.

生态趋势（EcoTrends）项目由黛布拉·彼得斯博士（霍纳达盆地长期生态研究站，美国农业部农业研究服务局霍纳达实验牧场）与阿里尔·卢戈博士（卢奎略长期生态研究站，美国农业部林务局卢奎略实验森林）于2004年创立，旨在支撑长期生态数据集的采集与分析工作。
该项目是一项大型综合研究计划，核心目标是提升长期生态数据的可获取性与应用效能。
目前共有约50个州级及联邦资助的研究站点参与并为生态趋势（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）、美国农业部林务局、美国能源部、美国地质调查局（US Geological Survey, USGS）及众多高校资助的研究站点。
生态趋势（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网页应用，为用户提供持续的数据汇编与数据获取服务。
作为长期生态研究溯源感知综合跟踪架构（Provenance Aware Synthesis Tracking Architecture, PASTA）的组成部分，实时开展的数据汇编工作将通过人工与自动两种处理机制完成更新。
该网络门户由霍纳达长期生态研究站（Jornada LTER）与长期生态研究网络办公室联合共建。
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（gramsPerMeterSquaredPerYear）为单位的地上净初级生产力测量值，且数据已按年度时间尺度进行聚合。