Sevilleta site, station Five Points, study of plant cover of Chamaesyce glyptosperma (ribseed sandmat) 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 Chamaesyce glyptosperma (ribseed sandmat) measurements in percent units
and were aggregated to a yearly timescale.

EcoTrends项目由黛布拉·彼得斯博士（约纳达盆地长期生态研究站（Long-Term Ecological Research, LTER），隶属于美国农业部农业研究服务局（USDA-ARS）约纳达实验牧场）与阿里尔·卢戈博士（卢奎洛长期生态研究站（Long-Term Ecological Research, LTER），隶属于美国农业部林务局（USDA-FS）卢奎洛实验林）于2004年创立，旨在支撑长期生态数据集的采集与分析工作。本项目为大型综合研究计划，核心目标在于提升长期生态数据的可获取性与应用效能。目前共有约50个由州级与联邦政府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，以及由美国农业部农业研究服务局（ARS）、美国农业部林务局（FS）、美国能源部、美国地质调查局（USGS）及众多高校资助的各类站点。EcoTrends项目的数据可通过探索性网络门户（http://www.ecotrends.info）获取。该门户依托交互式网络应用程序，支持用户持续开展数据整合与获取操作。作为长期生态研究网络溯源感知综合跟踪架构（Provenance Aware Synthesis Tracking Architecture, PASTA）的组成部分，持续进行的数据整合工作通过人工与自动两种处理模式完成更新。本网络门户是约纳达盆地长期生态研究站与LTER网络办公室的合作成果。本次提供的塞维列塔（Sevilleta, SEV）数据集包含以百分比为单位的Chamaesyce glyptosperma（ribseed sandmat，肋籽沙大戟）盖度测量数据，且已按年度时间尺度完成聚合。