Luquillo Experimental Forest site, station Rio Grande County, PR (FIPS 72119), study of human population (total) in units of number 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 Luquillo Experimental Forest (LUQ)
contains human population (total) measurements in number units
and were aggregated to a yearly timescale.

生态趋势（EcoTrends）项目于2004年由黛布拉·彼得斯博士（乔纳达盆地长期生态研究站，美国农业部农业研究服务局乔纳达实验牧场）与阿里尔·卢戈博士（卢奎洛长期生态研究站，美国农业部林务局卢奎洛实验林）创立，旨在支持长期生态数据集的收集与分析工作。本项目为大型综合研究计划，聚焦于提升长期数据的可获取性与应用价值。目前共有约50个由州政府及联邦政府资助的研究站点参与并为生态趋势项目贡献数据，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（USDA Agriculture Research Service, ARS）、美国农业部林务局（USDA Forest Service）、美国能源部、美国地质调查局（US Geological Survey, USGS）及众多高校资助的站点。生态趋势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网络应用程序，支持用户持续开展数据汇编与数据获取操作。作为长期生态研究溯源感知综合跟踪架构（LTER Provenance Aware Synthesis Tracking Architecture, PASTA）的组成部分，实时数据汇编工作通过手动与自动两种处理方式进行更新。该网络门户由乔纳达长期生态研究站与长期生态研究网络办公室联合打造。以下来自卢奎洛实验林（Luquillo Experimental Forest, LUQ）的数据集包含以数值为单位的总人口统计数据，且已按年度时间尺度进行聚合。