Cedar Creek Ecosystem Science Reserve site, station Old Field 72 at Cedar Creek, study of plant cover of Sorghastrum nutans 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 Cedar Creek Ecosystem Science Reserve (CDR)
contains plant cover of Sorghastrum nutans measurements in percent units
and were aggregated to a yearly timescale.

EcoTrends项目（EcoTrends project）于2004年由黛布拉·彼得斯博士（霍纳达盆地长期生态研究站[Long-Term Ecological Research, LTER]，美国农业部农业研究服务局[USDA-ARS]霍纳达试验牧场）与阿里尔·卢戈博士（卢奎洛长期生态研究站[LTER]，美国农业部林务局[USDA-FS]卢奎洛试验林）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项目，核心聚焦于提升长期生态数据的可获取性与应用价值。当前共有约50个州级及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（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）与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汇编与数据获取工作。持续推进的数据汇编流程通过人工与自动两种方式完成更新，该流程隶属于长期生态研究站溯源感知综合跟踪架构（Provenance Aware Synthesis Tracking Architecture, PASTA）。
本网络门户由霍纳达LTER与LTER网络办公室合作共建。
以下来自锡达溪生态科学保护区（Cedar Creek Ecosystem Science Reserve, CDR）的数据集，包含以百分比为单位的垂穗高粱草（Sorghastrum nutans）植被盖度测量数据，且已按年际时间尺度进行聚合处理。