Sevilleta site, station Deep Well, study of plant cover of Chamaesyce serpyllifolia ssp. serpyllifolia (thymeleaf 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 serpyllifolia ssp. serpyllifolia (thymeleaf sandmat) 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，USDA-ARS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，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。该项目是一项大型综合研究计划，核心目标在于提升长期生态数据的可获取性与应用效率。目前，共有约50个由州政府及联邦政府资助的研究站点参与并向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汇编与数据获取工作。作为LTER溯源感知综合跟踪架构（PASTA）的组成部分，常态化的数据汇编工作通过手动与自动两种处理方式进行更新。本网络门户由乔纳达LTER站与LTER网络办公室合作开发。以下来自塞维利塔（SEV）的数据集包含以百分比为单位的Chamaesyce serpyllifolia ssp. serpyllifolia（百里叶沙戟）植株盖度测量数据，且已按年度时间尺度进行聚合。