North Temperate Lakes site, station Lake Monona, study of animal abundance of Esox lucius in units of numberPerEffort 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 animal abundance of Esox lucius measurements in numberPerEffort units
and were aggregated to a yearly timescale.

EcoTrends项目由黛布拉·彼得斯博士（霍尔多纳盆地长期生态研究站（Jornada Basin LTER），美国农业部农业研究服务局霍尔多纳实验牧场）与阿里埃尔·卢戈博士（卢奎约长期生态研究站（Luquillo LTER），美国农业部林务局卢奎约实验林）于2004年发起创立，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价值。目前共有约50个由州政府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）资助的站点与众多高校相关站点。EcoTrends项目的数据集可通过探索性网络门户（http://www.ecotrends.info）获取。该网络门户搭载交互式网页应用，可支持用户持续开展数据整编与数据获取工作。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，当前的数据整编工作通过人工与自动两种处理方式进行更新。该网络门户由霍尔多纳LTER与长期生态研究网络办公室联合共建。下述来自北温带湖泊（North Temperate Lakes, NTL）的数据集，包含了白斑狗鱼（Esox lucius）的丰度测量数据，其计量单位为单位采样努力量个体数（numberPerEffort），并已按年尺度完成聚合。