Historical reconstruction of sea urchin grazing events in Aleutian Island ecosystem from grazing scars, 1965-2004

<p>Historical reconstruction of sea urchin grazing events in the ecosystem, achieved via enumerating the annual frequency of grazing scars that are archived in the calcified matrix of <em>Clathromorphum nereostratum</em>. Intact colonies of <em>C. nereostratum </em>were collected via SCUBA. Reconstructions were performed on polished and imaged sample cross-sections.</p>