Sevilleta site, station Deep Well, study of plant cover of Cactaceae (cactus) in units of percent 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 Sevilleta (SEV) contains plant cover of Cactaceae (cactus) measurements in percent units and were aggregated to a yearly timescale.

EcoTrends项目由黛布拉·彼得斯博士（乔纳达盆地长期生态研究站点，美国农业部农业研究服务局乔纳达实验牧场）与阿里尔·卢戈博士（卢奎洛长期生态研究站点，美国农业部林务局卢奎洛实验森林）于2004年创立，旨在支撑长期生态数据集的采集与分析工作。该项目为大型综合研究计划，核心目标是提升长期数据集的可获取性与应用价值。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，其中涵盖全部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服务局（USDA-ARS）、美国农业部林务局（USDA-FS）、美国能源部、美国地质调查局（United States Geological Survey，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网页应用，支持用户持续开展数据整合与数据获取操作。作为长期生态研究溯源感知综合跟踪架构（LTER Provenance Aware Synthesis Tracking Architecture，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。该网络门户由乔纳达盆地LTER站点与LTER网络办公室联合开发。本次提供的塞维利塔（SEV）数据集包含以百分比为单位的仙人掌科（Cactaceae）植物盖度测量数据，且已被聚合至年度时间尺度。