In the southern portion of CA-II that is dominated by sandy substrate, sponges are one of the microhabitats whose abundance differs significantly between fished and unfished areas (Lindholm et al.
amphipods and the brittle star Ophiura robusta) in the southern portion of CA-II (Link et al.
droebachiensis may have also benefited from the elevated cover of colonial epifauna in CA-II because this species is known to eat sponges, hydroids, bryozoans, tunicates, and amphipod and polychaete tube complexes at locations where macroalgae and kelp (the preferred diet of sea urchins) are absent (Briscoe and Sebens, 1988).
After the establishment of CA-II, several colonial and noncolonial taxa underwent successive increases and declines in abundance at site 17, thus, providing potential evidence of ecological succession.
At the 50-m site on Cashes Ledge, which is the most comparable to our study area in CA-II, I.