Pacific Rocky Intertidal Monitoring: Trends and Synthesis

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Old Stairs

Click here for Long-Term trends

Click here for Biodiversity Survey findings

Old Stairs is located in the South Coast region of California. This site is located in an Area of Special Biological Significance (Mugu Lagoon to Latigo Point ASBS). This site is near the Point Mugu Old Stairs Mussel Watch site. This moderately sloping site consists of extremely uneven terrain, containing many deep cracks and folds.

Old Stairs biodiversity survey overview

Old Stairs is dominated by a mixture of consolidated sandstone bedrock, riprap, boulder fields, and sandy beach, and the area surrounding the site is comprised of a mixture of boulder fields and sandy beach at this site. The primary coastal orientation of this site is southwest.

Long-Term Monitoring Surveys at Old Stairs were established in 1994, and are done by University of California Los Angeles. Long-Term MARINe surveys currently target the following species and/or areas: Anthopleura (Anemones), Chthamalus/Balanus (Acorn Barnacles), Mytilus (California Mussel), Endocladia (Turfweed), Rock (Above Barnacles), and Pisaster (Ochre Star). In addition, motile invertebrates, barnacle recruitment, and mussel size structure are monitored at this site. Click here to view Long-Term trends at this site.

Old Stairs long-term monitoring overview

Biodiversity Surveys were done by University of California Santa Cruz in 2001. The Biodiversity Survey grid encompasses two sections that are approximately 6 meters (along shore) x 20 meters (seaward), and 21 meters (along shore) x 20 meters (seaward). Click here to view Biodiversity Survey findings at this site.

For more information about Old Stairs, please contact Rich Ambrose.

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