Research Technical Report

Marine Resource Characterization of Intertidal and Subtidal Sites Influenced by Landslides in Big Sur

Carr, M., S. Lonhart, and P. Raimondi (March 2004)

Poster presentation at the Sanctuary Currents Symposium, Seaside, CA

ABSTRACT

The Monterey Bay National Marine Sanctuary and the California Coastal Commission are working closely with the California Department of Transportation (CalTrans) and several other local, state, and federal agencies to develop a Corridor Management Plan along the Big Sur Coast. Highway 1 in Big Sur is often subject to delays and closures due to storms, washouts, and landslides. The purpose of the Big Sur Coast Highway Management Plan (CHMP) is to develop sustainable strategies that ensure the safe and efficient operation of the highway while protecting the unique qualities and sensitive terrestrial and marine resources of this remarkable coastline. As one part of the CHMP, this project was designed to survey intertidal and nearshore subtidal areas along the Big Sur coast. The surveys will focus on areas of coastline known or with the greatest potential to be affected by highway repairs from landslides or other storm-related events. Researchers will characterize sites by their biological assemblages, general geology, local wave action and exposure, and proximity to recent landslides. The data collected include species lists, population densities, and presence of econimically important, particularly sensitive and/or endangered species. The results will be placed into multiple GIS-data layers and maps for resource managers and the public. Sites will be re-sampled in June 2004 to detect seasonal differences. A final report will be available in Fall 2004.