ECOLOGICAL STUDIES :IT LOUGH INE
279
FIG. 69. Curlew Bay, showing the distribution of algal c o w r a i d the po4tion of the sector
cleared of Pnrcccentrotitn in July 1959.
FIQ. 70. Diagrams of the section at J and K (Fig. 69) showing (a) the number of P a w -
centrotus per square metre, (b) the percentage coverage of the bottom with algae, (c) the
bottom profile, (d) the nature of the bottom expressed as the percentage area covered
with boulders, gravel, or mud.
Throughout the sections a t J t,he bottom consisted of shell gravel resting on mud.
279
FIG. 69. Curlew Bay, showing the distribution of algal c o w r a i d the po4tion of the sector
cleared of Pnrcccentrotitn in July 1959.
FIQ. 70. Diagrams of the section at J and K (Fig. 69) showing (a) the number of P a w -
centrotus per square metre, (b) the percentage coverage of the bottom with algae, (c) the
bottom profile, (d) the nature of the bottom expressed as the percentage area covered
with boulders, gravel, or mud.
Throughout the sections a t J t,he bottom consisted of shell gravel resting on mud.