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Observe the effects of herbivores on the abundance of algae and to test whether the presence of algae on the substratum determines further settlement of more algae.
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Abstract An experiment was carried out on the rocky intertidal shore at Maroubra beach in NSW. The aims were to observe the effects of herbivores on the abundance of algae and to test whether the presence of algae on the substratum determines further settlement of more algae. The experiment was carried out by dividing 20 plots into 5 treatments, incorporating a control, looking at the effects oh herbivore exclusion through anti-fouling paint and algal settlement through scraping of the rocky shore. It was shown that the removal of herbivores significantly altered the abundance of algae but that scraping had no significant effect for algal recruitment. Reasons for this are discussed. Introduction. The 'Sub tidal zone that connects land and sea has been somewhat frivolously studied by ecologists yet comprehensively studied by both zoologists and marine botanists' (adapted from; Carefoot, T., 1977), the ecological complexity is of great magnitude and there is an acute...
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