North Temperate Lakes site, station Lake Wingra, study of animal abundance of Pomoxis nigromaculatus 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 Pomoxis nigromaculatus measurements in numberPerEffort units
and were aggregated to a yearly timescale.

EcoTrends项目于2004年由德布拉·彼得斯博士（乔纳达盆地长期生态研究站（Jornada Basin LTER），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站（Luquillo LTER），美国农业部林务局（USDA-FS）卢奎洛实验林）发起创立，旨在支撑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，核心目标是提升长期生态数据的可获取性与应用效能。目前共有约50个州级与联邦资助的研究站点参与本项目并贡献数据，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）、美国农业部林务局、美国能源部、美国地质调查局（USGS）及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应用程序，为用户提供持续的数据整合与获取服务。作为LTER溯源感知综合跟踪架构（Provenance Aware Synthesis Tracking Architecture, PASTA）的组成部分，本项目的持续数据整合工作通过人工与自动两种处理方式完成更新。本网络门户为乔纳达LTER与LTER网络办公室的合作成果。下述来自北温带湖泊（North Temperate Lakes, NTL）的数据集，包含以numberPerEffort（每采样努力个体数）为单位的黑斑刺盖太阳鱼（Pomoxis nigromaculatus）种群丰度测量数据，且已按年尺度完成聚合。