Intertidal and Subtidal Grazers

  • G. M. Branch
  • C. A. Moreno
Part of the Ecological Studies book series (ECOLSTUD, volume 103)


Grazing animals exert an important influence on the nature of intertidal and shallow subtidal biotic communities, because of their influence on algae. Removal of grazers often leads to a dramatic development of seaweed beds. In this chapter we begin by tracing the effects that human exploitation has on populations of grazers and on algae. These effects are usually obvious and easy to predict. There are, however, indirect effects that can arise from exploiting grazers, and these are often neither obvious nor easy to predict. This is particularly true in multispecies fisheries, and when effects flow from the exploitation of one species to other species, which seem only remotely connected with the target species. We conclude our account by making comparisons between the roles of grazers in Chile and South Africa, which emphasize the difficulty of extrapolating from one species to another and from one part of the world to another.


Rocky Shore Marine Reserve Rocky Intertidal Community Muricid Gastropod Chile Central 
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© Springer-Verlag Berlin Heidelberg 1994

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  • G. M. Branch
  • C. A. Moreno

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