Plum Island Ecosystems site, station NADP Station MA13, East, MA, study of nitrogen from ammonium in wet deposition in units of kilogramsPerHectare on a monthly 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 Plum Island Ecosystems (PIE)
contains nitrogen from ammonium in wet deposition measurements in kilogramsPerHectare units
and were aggregated to a monthly timescale.

EcoTrends项目由Debra Peters博士（约那盆地长期生态研究站（Jornada Basin LTER）、美国农业部农业研究服务局约那实验牧场）与Ariel Lugo博士（卢奎洛长期生态研究站（Luquillo LTER）、美国农业部森林服务局卢奎洛实验林）于2004年创立，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计划，核心目标是提升长期生态数据的可获取性与应用效能。目前已有约50个由州政府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（Long-Term Ecological Research, LTER）站点，以及由美国农业部农业研究服务局（ARS）、美国农业部森林服务局、美国能源部、美国地质调查局（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应用程序，支持用户持续开展数据汇编与数据访问工作。作为长期生态研究站溯源感知综合跟踪架构（LTER Provenance Aware Synthesis Tracking Architecture, PASTA）的组成部分，持续推进的数据汇编工作通过人工与自动处理两种方式完成更新。该网络门户是约那LTER与LTER网络办公室的合作成果。本数据集源自普拉姆岛生态系统（Plum Island Ecosystems, PIE），包含以千克每公顷为单位的湿沉降铵态氮测量数据，并已聚合至月尺度。