The ecology of coral reefs The ecology of coral reefs : results of a Workshop on Coral Reef Ecology held by the American Society of Zoologists, Philadelphia, Pennsylvania, December 1983 ecologyofcoralre00reak Year: 1985 URCHINS GRAVEL 1—'—f O0625 mm MUD - Figure curves for the sand fraction of sediment from alimentary tracts of uncaged urchins (upper), from urchins and rocks in bucket enclosures (middle), and from rocks without urchins in bucket enclosures (bottom). Data for the gravel and mud fractions are not given; scale of the y-axis is identical for all sed

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The ecology of coral reefs The ecology of coral reefs : results of a Workshop on Coral Reef Ecology held by the American Society of Zoologists, Philadelphia, Pennsylvania, December 1983 ecologyofcoralre00reak Year: 1985 URCHINS GRAVEL 1—'—f O0625 mm MUD - Figure curves for the sand fraction of sediment from alimentary tracts of uncaged urchins (upper), from urchins and rocks in bucket enclosures (middle), and from rocks without urchins in bucket enclosures (bottom). Data for the gravel and mud fractions are not given; scale of the y-axis is identical for all sediments. 157

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