Luquillo Experimental Forest site, station NADP Station PR20, El Verde, PR, study of sulfate in wet deposition in units of kilogramsPerHectare 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 Luquillo Experimental Forest (LUQ)
contains sulfate in wet deposition measurements in kilogramsPerHectare units
and were aggregated to a yearly timescale.

EcoTrends项目由Debra Peters博士（华楚卡盆地长期生态研究站（Jornada Basin LTER）、美国农业部农业研究局（USDA-ARS）华楚卡实验牧场）与Ariel Lugo博士（卢奎洛长期生态研究站（Luquillo LTER）、美国农业部林务局（USDA-FS）卢奎洛实验森林）于2004年创立，旨在支撑长期生态数据集的采集与分析工作。该项目为一项大型综合研究计划，核心聚焦于提升长期生态数据的可获取性与利用效率。目前已有约50个州立及联邦资助的研究站点参与并为EcoTrends项目贡献数据，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局（USDA-ARS）、美国农业部林务局（USDA-FS）、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Web应用，支持用户持续开展数据整合与数据获取工作。作为长期生态研究溯源感知综合跟踪架构（LTER Provenance Aware Synthesis Tracking Architecture, PASTA）的组成部分，其持续的数据整合工作通过人工与自动两种处理方式进行更新。该网络门户由华楚卡盆地长期生态研究站与LTER网络办公室合作开发。本数据集源自卢奎洛实验森林（LUQ），包含以千克/公顷为单位的湿沉降硫酸盐测量数据，且已按年际尺度完成聚合。