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Patterns of abundance of the sea urchin centrostephanus rodgersii agassiz on the central coast of new south wales australia



Patterns of abundance of the sea urchin centrostephanus rodgersii agassiz on the central coast of new south wales australia



Journal of Experimental Marine Biology & Ecology 131(1): 61-80



The abundances of Centrostephanus and associated organisms in areas dominated by encrusting algae (Barrens) were monitored through time at four locations in New South Wales, Australia: Boat Harbour, Cape Banks, Bare Island and Bushrangers' Bay. The abundance of Centrostephanus changed very little during 3 yr at all locations except Bare Island. The densities of limpets, turbinids, crustose and filamentous algae similarly varied little during this period. At Boat Harbour and Bushrangers' Bay, the size-frequency distributions of Centrostephanus were unimodal and no recruitment had occurred at these locations for > 4 yr. In contrast, at Cape Banks and Bare Island, the sizes of sea urchins indicated consistently successful recruitment. Possible reasons for these differences are suggested and their implications for the structure of these subtidal assemblages are discussed.

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Accession: 007636255

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DOI: 10.1016/0022-0981(89)90011-7


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