The Northern San Diego County Lagoons Historical Ecology Investigation reconstructs the landscape and ecosystem characteristics of northern San Diego County lagoons prior to the major modifications of the late 19th and 20th centuries.

This report describes a project funded by the National Park Service to collect and assess historical data about the Mt. Wanda unit of the John Muir National Historic Site south of downtown Martinez, CA. The report conducted an initial synthesis of the data to enhance understanding of early ecological conditions, and evaluate the potential benefits of further data collection and analysis.

This study synthesizes a diverse array of data to examine the ecological patterns, ecosystem functions, and hydrology that characterized a central portion of the Laguna de Santa Rosa during the mid-19th century, and to analyze landscape changes over the past 150 years. The primary purpose of this study was to help guide restoration actions and other measures aimed at reducing nutrient loads within this portion of the Laguna de Santa Rosa watershed.