Walnut Gulch Experimental Watershed site, station Shrubs with grass vegetation zone in Walnut Gulch Watershed, study of plant cover of Larrea tridentata (creosote bush) 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 Walnut Gulch Experimental Watershed (WGE)
contains plant cover of Larrea tridentata (creosote bush) measurements in percent units
and were aggregated to a yearly timescale.

EcoTrends项目由黛布拉·彼得斯博士与阿里尔·卢戈博士于2004年创立，前者就职于乔纳达盆地长期生态研究（Long-Term Ecological Research, LTER）站点、美国农业部农业研究局（USDA-ARS）乔纳达实验牧场，后者就职于卢奎洛长期生态研究（Long-Term Ecological Research, LTER）站点、美国农业部林务局（USDA-FS）卢奎洛实验森林，本项目旨在支撑长期生态数据集的采集与分析工作。
本项目为一项大型综合研究计划，核心目标在于提升长期数据的可获取性与应用效能。
目前已有约50个由州政府及联邦政府资助的研究站点参与并助力EcoTrends项目，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（Agricultural Research Service, ARS）、美国农业部林务局（Forest Service, FS）、美国能源部、美国地质调查局（United States Geological Survey, USGS）及众多高校资助的研究站点。
EcoTrends项目的数据集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络应用程序，支持用户持续开展数据汇编与数据获取工作。
作为长期生态研究站点溯源感知综合跟踪架构（Provenance Aware Synthesis Tracking Architecture, PASTA）的组成部分，持续推进的数据汇编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LTER站点与LTER网络办公室联合开发运营。
以下来自胡桃谷实验流域（Walnut Gulch Experimental Watershed, WGE）的数据集，包含以百分比为单位的三齿拉瑞阿（Larrea tridentata，俗称石炭酸灌木）植株盖度测量数据，且已按年度时间尺度进行聚合。