North Temperate Lakes site, station Trout Lake, study of plant species richness in units of numberPer5SquareMeters 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 North Temperate Lakes (NTL)
contains plant species richness measurements in numberPer5SquareMeters units
and were aggregated to a yearly 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局约那实验牧场（USDA-ARS Jornada Experimental Range））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（USDA-FS Luquillo Experimental Forest））于2004年创立，旨在支撑长期生态数据集的采集与分析工作。该项目是一项大型综合研究计划，核心目标是提升长期生态数据的可获取性与复用性。目前已有约50个州级与联邦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，以及美国农业部农业研究局（ARS）、美国农业部森林服务局、美国能源部、美国地质调查局（USGS）下属站点与众多高校站点。EcoTrends项目的数据集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汇编与数据获取工作。作为LTER溯源感知综合跟踪架构（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。该网络门户由约那LTER与LTER网络办公室联合开发。本次提供的北温带湖泊（North Temperate Lakes, NTL）数据集包含以每5平方米物种数为单位的植物物种丰富度测量数据，且已聚合至年度时间尺度。