Abstract
Publisher Summary The distribution boundaries of algal zones on rocky shores are not coincident; there is a high degree of correspondence between community units recognized by major species or physiognomies and units recognized by multivariate analysis. Benthic ecologists who study rocky shores have provided many qualitative models for community regulation. This chapter discusses the vegetation ecology of rocky shores and describes the effects of disturbance, competition, predation, environmental stress, and recruitment through a single graphical model. It also reviews the disturbance on rocky shores. The sources of disturbance are manifold. They include the physical effects of wave force, ice scouring, moving rocks, and sand. There are biological disturbances including predation and parasitism. With so many forces—each operating at variable intensities and scales of space and time—there is so much spatial and temporal variation in the creation of new sites for colonization. There is no suitable classification of disturbances into categories, except at the coarsest level.
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