Harvard Forest site, station Tolland County, CT (FIPS 9013), study of farmland acres (total) in units of acre 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 Harvard Forest (HFR) contains farmland acres (total) measurements in acre units and were aggregated to a yearly timescale.

EcoTrends项目由德布拉·彼得斯博士（乔纳达盆地长期生态研究（Long-Term Ecological Research, LTER）、美国农业部农业研究服务局（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（Long-Term Ecological Research, LTER）、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收集与分析工作。该项目是一项大型综合研究计划，核心目标是提升长期生态数据的可获取性与应用价值。目前共有约50个州立及联邦资助的研究站点参与本项目并贡献数据，其中包含全部26个LTER站点，以及由农业研究服务局（Agricultural Research Service, ARS）、美国农业部林务局（USDA Forest Service）、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Web应用，为用户提供持续的数据整合与访问服务。作为LTER溯源感知综合跟踪架构（Provenance Aware Synthesis Tracking Architecture, PASTA）的组成部分，常态化的数据整合工作通过手动与自动两种处理方式完成更新。本网络门户由乔纳达LTER站点与LTER网络办公室联合开发运营。以下来自哈佛森林（Harvard Forest, HFR）的数据集以英亩为单位记录了农田总面积（总计）的测量值，并已按年度时间尺度进行聚合。