Harvard Forest site, station Middlesex County, CT (FIPS 9007), study of number of farms in units of number 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 number of farms measurements in number units and were aggregated to a yearly timescale.

生态趋势（EcoTrends）项目由黛布拉·彼得斯博士（乔纳达盆地长期生态研究站点，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（卢奎约长期生态研究站点，美国农业部林务局（USDA-FS）卢奎约实验森林）于2004年创立，旨在支持长期生态数据集的采集与分析工作。本项目为一项大型综合研究计划，致力于提升长期数据的可获取性与复用性。目前，已有约50个州级与联邦资助的研究站点参与并为生态趋势项目贡献数据，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）与众多高校资助的站点。
生态趋势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Web应用程序，为用户持续开展数据整合与数据获取工作提供支持。作为长期生态研究（LTER）溯源感知综合跟踪架构（Provenance Aware Synthesis Tracking Architecture，简称PASTA）的组成部分，持续进行的数据汇编工作通过人工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。
以下为来自哈佛大学森林（Harvard Forest，简称HFR）的数据集，包含以数值为单位的农场数量测量数据，并已按年度时间尺度完成聚合。