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Title: The effects of the closure of a major sewage outfall on sublittoral, soft sediment bethnic communities
Author: Smith, J.
Awarding Body: University of Wales Swansea
Current Institution: Swansea University
Date of Award: 2000
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This study examines the benthos within western, inner Swansea Bay, for the period before, during and immediately after the cessation of a major, sewage discharge from Mumbles Head and assesses whether any changes in the benthos affect the growth of juvenile flatfish. The results of this investigation show that there have been significant improvements in seawater quality in western, inner Swansea Bay following the cessation of the Mumbles Head sewage discharge and that there have been changes in the species composition of the benthic communities within the study area. There has been an increase in the diversity of deposit feeders, especially the amphipods, and a decrease in the diversity of the filter feeders, especially the polychaetes. These changes are not attributable either to the sediment organic matter content or to gross changes in sediment type over the study period but are related to the significant reduction in total suspended particulate organic material discharged to the Bay. There have also been changes in the diet of juvenile flatfish on the nursery grounds of western, inner Swansea Bay which can be related to the changes in species composition of the benthic communities. A recovery model has been proposed to describe how shallow water, soft sediment, sublittoral benthic communities respond to the abrupt cessation of a major sewage discharge.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available