Sea urchins structure benthic algal associations in many shallow subtidal communities. The kelps increased in abundance in 1978 at Torch Bay, Alaska, when Strongy‐locentrotus spp. fed upon an unusually plentiful supply of benthic diatoms and pelagic salps, reaching a safe size as a result of a temporary interruption in the normal feeding patterns of the sea urchins.
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David O. Duggins (1981) studied this question.