Marcell Experimental Forest site, station NADP Station MN16, Marcell Experimental Forest, MN, 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 Marcell Experimental Forest (MAR) contains sulfate in wet deposition measurements in kilogramsPerHectare units and were aggregated to a yearly timescale.

EcoTrends项目（EcoTrends project）由黛布拉·彼得斯博士（乔纳达盆地长期生态研究（Long-Term Ecological Research, LTER）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（卢奎洛长期生态研究（Long-Term Ecological Research, LTER）站点、美国农业部林务局（USDA-FS）卢奎洛实验林）于2004年创立，旨在支持长期生态数据集的采集与分析。本项目为大型综合研究计划，聚焦于提升长期数据的可获取性与应用效率。目前共有约50个州立及联邦资助的研究站点参与并向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）及众多高校资助的研究站点。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汇编与数据访问工作。作为长期生态研究网络溯源感知综合跟踪架构（Provenance Aware Synthesis Tracking Architecture, PASTA）的组成部分，持续推进的数据汇编工作通过手动与自动处理两种方式完成更新。本网络门户由乔纳达LTER站点与LTER网络办公室合作开发。以下来自马塞尔实验森林（Marcell Experimental Forest, MAR）的数据集，包含以千克每公顷为单位的湿沉降硫酸盐测量数据，且已按年尺度进行聚合。