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

EcoTrends项目由Debra Peters博士（约拿盆地长期生态研究网（Long-Term Ecological Research, LTER），美国农业部农业研究局约拿实验牧场）与Ariel Lugo博士（卢基略长期生态研究网，美国农业部林务局卢基略实验森林）于2004年创立，旨在支撑长期生态数据集的收集与分析工作。
该项目为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及性与利用率。目前共有约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（Agricultural Research Service, ARS）、美国农业部林务局、美国能源部、美国地质调查局（United States Geological Survey, USGS）资助的站点，另有众多高校参与其中。
EcoTrends项目的数据可通过探索性网络门户（http://www.ecotrends.info）获取。该门户依托交互式网络应用，支持用户持续开展数据汇编与数据访问操作。作为长期生态研究网溯源感知综合跟踪架构（Provenance Aware Synthesis Tracking Architecture, 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模式完成更新。该网络门户由约拿LTER站点与LTER网络办公室联合开发。
本次提供的北温带湖泊（North Temperate Lakes, NTL）数据集包含钝吻美洲鱥（Notropis heterolepis）的种群丰度实测数据，计量单位为numberPerEffort，且已按年际时间尺度完成聚合。