The EcoTrends Project is a collaboration between the Long Term Ecological Research Network (LTER), the USDA Forest Service, and the USDA Agriculture Research Service to synthesize long-term ecological trends.

Coweeta LTER and Central Arizona-Phoenix LTER collected human population and economic data from 1790 to 2000, which represent one of four types of data being synthesized in the EcoTrends Project. The Human Population and Economy dataset contains over two hundred separate variables suitable for describing changes in population and economic structure since the end of the eighteenth century. The dataset was collected for each of the more than two hundred and fifty counties associated with the 21 continental North American LTER sites plus the Luquillo site in Puerto Rico.





The EcoTrends Interactive Socio-Economic Catalog is being upgraded and updated. The Data Dictionary is available to provide data definitions, and a copy of the data supporting the EcoTrends book are are available as a desktop database configured in a relational framework using Microsoft's Access database software.


This material is based upon work supported by the National Science Foundation under Cooperative Agreements DEB-9632854 (Text Version) & DEB-0218001 (Text Version).

Any opinions, findings, conclusions, or recommendations expressed in the material are those of the authors and do not necessarily reflect the views of the National Science Foundation.


Data contained herein are distributed freely and without restriction on use.
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