Santa Rita Experimental Range site, station Santa Rita Experimental Range burned treatment: pasture 21, study of plant cover of Acacia greggii (catclaw acacia) 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 Santa Rita Experimental Range (SRE)
contains plant cover of Acacia greggii (catclaw acacia) measurements in percent units
and were aggregated to a yearly timescale.

生态趋势（EcoTrends）项目于2004年由黛布拉·彼得斯博士（霍尔多纳盆地长期生态研究站，美国农业部农业研究服务局（USDA-ARS）霍尔多纳实验牧场）与阿里尔·卢戈博士（卢奎洛长期生态研究站，美国农业部林务局（USDA-FS）卢奎洛实验林场）发起，旨在支撑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工作，核心目标为提升长期生态数据的可获取性与复用性。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贡献数据至生态趋势项目，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服务局（ARS）、美国农业部林务局、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。该项目的数据可通过探索式网络门户（http://www.ecotrends.info）获取，该门户依托交互式Web应用程序，支持用户持续开展数据整合与数据获取工作。持续开展的数据整合工作通过人工与自动两种处理方式完成更新，该流程隶属于LTER源感知综合跟踪架构（Provenance Aware Synthesis Tracking Architecture，简称PASTA）。该网络门户由霍尔多纳LTER站与LTER网络办公室联合开发运营。以下来自圣丽塔实验牧场（Santa Rita Experimental Range，简称SRE）的数据集，包含格氏金合欢（Acacia greggii，俗称猫爪金合欢）的植被盖度百分比测量数据，且数据已按年尺度进行聚合。