Shortgrass Steppe site, station Treatment 4 (grubs killed) for ESA study, study of plant density of Aristida longiseta 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 of Aristida longiseta measurements in numberPerMeterSquared units and were aggregated to a yearly timescale.

EcoTrends项目由黛布拉·彼得斯博士（约纳盆地长期生态研究站，美国农业部农业研究局约纳实验牧场）与阿里尔·卢戈博士（卢奎洛长期生态研究站，美国农业部林业局卢奎洛实验森林）于2004年创立，旨在支持长期生态数据集的收集与分析工作。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应用效率。目前共有约50个由州级及联邦政府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，简称LTER）站点，以及由美国农业部农业研究局（ARS）、美国农业部林业局、美国能源部、美国地质调查局（USGS）与众多高校资助的研究站点。EcoTrends项目的数据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整合与获取工作。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，正在推进的数据整合工作通过人工与自动处理两种方式完成更新。本网络门户由约纳LTER站与LTER网络办公室合作共建。本次提供的短草草原（Shortgrass Steppe，简称SGS）数据集包含长三芒草（Aristida longiseta）的植株密度数据，单位为每平方米株数，且已按年度时间尺度进行聚合。