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>Increase in Cliona delitrix Infestation of Montastrea cavernosa Heads on an Organically Polluted Portion of the Grand Cayman Fringing Reef
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Increase in Cliona delitrix Infestation of Montastrea cavernosa Heads on an Organically Polluted Portion of the Grand Cayman Fringing Reef
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机译：Increase in Cliona delitrix Infestation of Montastrea cavernosa Heads on an Organically Polluted Portion of the Grand Cayman Fringing Reef
Abstract.A marked increase in the biomass ofCliona delitrixinfestingMontastrea cavernosasubstrate occurred in a portion of the Grand Cayman fringing reef affected by the discharge of untreated fecal sewage. It is suggested that the six‐fold increase in bacteria biomass (both “coliforms” and natural marine bacterioplankton) in reef waters receiving the sewage effluent is linked to a five‐fold increase in sponge biomass at the polluted site relative to a control site. The elevated density ofC. delitrixbiomass signifies a similar increase in the amount ofM. cavernosaskeleton that has been eroded by this sponge and reduced to silt‐sized sediment. Thus, the proliferation of a bioeroding organism in the sewage‐stressed environment has caused a shift in the carbonate balance
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