California Department of Fish and Wildlife - Mission Bay Park

Restoration Project

California Department of Fish and Wildlife - Mission Bay Park

Restoration Objective:

MBPAR was created primarily to enhance fishing opportunities for recreational anglers.

Cause Of Decline:

Macrocystis pyrifera beds along the southern California coast were relatively stable prior to 1940. Declines were first reported in 1945 in areas nearest major sewage outfalls. This deterioration progressively affected beds at increasing distances from the outfalls, leaving small patches. Deterioration of kelp accelerated when an influx of warm oceanic water persisted off California from 1957-1959.

Key Reasons For Decline:


Scientific Paper

1997 biological surveys of four Southern California artificial reefs: Oceanside# 2. and Mission Bay Park

J. Kashiwada
Carlsbad, Pacific Beach.

Site Observations:

Observation Date

6th Jun 1991 – 1st Feb 1997

Action Summary:

The Mission Bay Park Artificial Reef (MBPAR) module surveyed here was constructed in 1992 using 9,200 tons of concrete roadway rubble scattered over 20 acres. Other modules at MBPAR were constructed with various materials including sunken ships and concrete bridge rubble.

Lessons Learned:

This artificial reef used 10,000 tonnes of quarry rock to create artificial reefs, however they did not effectively enhance macroalgae cover at most sites.

Project Outcomes:

The only substantial macroalgal community observed during this survey was the giant kelp forest on the MBPAR concrete rubble module.

Key Reasons For Decline:


Area of Restoration (Ha)


Indicator Data:


Ending Value:

Starting Value:

Adult Kelp Density

/ m2
/ m2