Harvard Forest site, station Bronx County, NY (FIPS 36005), study of county area in units of squareKilometers 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 county area measurements in squareKilometers units
and were aggregated to a yearly timescale.

EcoTrends项目于2004年由黛布拉·彼得斯博士（约尔纳达盆地长期生态研究站点（Jornada Basin LTER），美国农业部农业研究局约尔纳达试验牧场（USDA-ARS Jornada Experimental Range））与阿里尔·卢戈博士（卢奎洛长期生态研究站点（Luquillo LTER），美国农业部林务局卢奎洛试验林（USDA-FS Luquillo Experimental Forest））创立，旨在支持长期生态数据集的采集与分析工作。本项目为大型综合研究计划，聚焦于提升长期生态数据的可获取性与应用效率。目前已有约50个由州级与联邦政府资助的研究站点参与并为EcoTrends项目贡献数据，其中包括全部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局（USDA Agricultural Research Service，简称ARS）、美国农业部林务局、美国能源部、美国地质调查局（United States Geological Survey，简称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。该网络门户依托交互式Web应用程序，支持用户持续开展数据整合与数据访问工作。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，简称PASTA）的组成部分，持续进行的数据整合工作通过人工与自动两种处理方式完成更新。本网络门户由约尔纳达LTER与LTER网络办公室联合开发。哈佛森林（Harvard Forest，简称HFR）提供的如下数据集包含以平方千米为单位的县域面积测量值，且已按年度时间尺度进行聚合。