Lindholm et al.: Ecological effects of bottom trawling on fish habitat along the central California outer continental shelf 
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Control Trawled North reference • South reference 
Figure 4 
Results from visual surveys conducted with a remotely operated vehicle between 2009 and 2012 at 
control (untrawled) and trawled plots before and after low- and high-intensity experimental trawl- 
ing across the primary study area in waters off Point Buchon and Morro Bay in central California: 
(A) percent cover of microtopography with bioturbation, ( B ) density of sessile invertebrates, and 
(C) density of mobile invertebrates, Also shown are values from surveys completed in May 2012 at 
reference sites north and south of the main study area. Error bars indicate 95% confidence intervals. 
