Grazer density in intertidal and subtidal habitats.

<p>Mean density (±1 SE) of gastropod grazers in A) intertidal and B) subtidal habitats in Eastern and South Australia, across the duration of the experiment; values are averages across locations (<i>n</i> = 10). Asterisks indicate values equal to zero. +G = Grazers present; −G = Grazers excluded; PC = Procedural control for the use of fences.