Distribution and abundance of intertidal sea urchins in South Africa

<p>This dataset contains data described in the paper entitled "Intertidal estimates of sea urchin abundance reveal congruence in spatial structure for a guild of consumers". Data include: (1) counts of intertidal sea urchins (<em>Diadema</em> cf. <em>savignyi</em>, <em>Echinometra mathaei</em>, <em>Parechinus angulosus</em>, <em>Stomopneustes variolaris</em>, and <em>Tripneustes gratilla</em>) made from 164 visits to 116 rocky shore sites across South Africa by six different observers; (2) GPS co-ordinates determined for every 1-km distance interval of the South African coastline starting from the mouth of the Orange River at the border of South Africa and Namibia; and (3) calculations of the amount of upstream and downstream rocky habitat from surveyed sites.</p>