Santa Rita Experimental Range site, station Pasture 21 at Santa Rita Experimental Range, study of plant density of Bouteloua hirsuta 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 Santa Rita Experimental Range (SRE)
contains plant density of Bouteloua hirsuta measurements in numberPerMeterSquared units
and were aggregated to a yearly timescale.

EcoTrends项目由黛布拉·彼得斯博士（乔尔纳达盆地长期生态研究（Long-Term Ecological Research，简称LTER）站点，美国农业部农业研究服务局（USDA-ARS）乔尔纳达实验牧场）与阿里尔·卢戈博士（卢奎洛长期生态研究（LTER）站点，美国农业部林业局（USDA-FS）卢奎洛实验林）于2004年创立，旨在支持长期生态数据集的采集与分析工作。该项目为大型综合研究计划，核心目标是提升长期生态数据的可获取性与利用效率。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LTER站点，以及美国农业部农业研究服务局（ARS）、美国农业部林业局、美国能源部、美国地质调查局（USGS）资助的站点，另有众多高校相关研究站点加入。EcoTrends项目的数据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整合与数据获取工作。作为LTER溯源感知综合跟踪架构（Provenance Aware Synthesis Tracking Architecture，简称PASTA）的组成部分，持续进行的数据整合工作通过手动与自动两种处理方式完成更新。该网络门户由乔尔纳达LTER站点与LTER网络办公室联合开发。本次提供的圣丽塔实验牧场（Santa Rita Experimental Range，简称SRE）相关数据集，包含以每平方米数量为单位的Bouteloua hirsuta植株密度测量数据，且已按年尺度进行聚合。