Effects of moderate sewage input on benthic polychaete populations

摘要: The polychaete fauna of a sandy intertidal habitat receiving effluent from sewage treatment plant was compared to that control site. total number individuals, biomass, and average species numbers were significantly greater at the sewage-affected response individual nutrient enrichment varied. Some showed individuals site while other species' densities no difference. All maintained biomass enriched site, most differences significant. Those which did not show density between sites tended have greatest difference in weight per individual. In general, with either benthic development or some form brooding behavior best able exploit condition by increased densities, It concluded for moderate increases concentrations, productivity will be enhanced those sediments very low concentrations fine sized particles.