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Title: Ecology of invertebrates and possible effects of pollution in the Loughor Estuary (Burry Inlet), South Wales
Author: Poopetch, T.
Awarding Body: University College of Swansea
Current Institution: Swansea University
Date of Award: 1980
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The work described was carried out in the Burry Inlet (Loughor Estuary), South Wales. Environmental conditions and the intertidal infauna in 1976 were described, 38 species being found so far. Their horizontal distribution (upstream penetration) is given and discussed; only 9 out of the 38 species were found at the head of the estuary (taken as Loughor Bridge). Of these, only 2 species were recorded in winter. The vertical distribution (upshore zonation) of each species, at each part of the estuary, is also described seasonally. Data on abundance and biomass are given. Changes in the faunal community over a longer period (2 years: 1976-1978) in the area likely to be subject to pollution (Llanelli: the middle part of the estuary) were sought and some were in both qualitative and quantitative aspects of the animal populations there. The levels of heavy metals (Cd, Cu, Zn) in Mollusca (Macoma balthica, Scrobicularia plana and Littorina littorea); Polychaetes (Nereis diversicolor) and Crustacea (Larcinus maenas) from various parts of the Burry Inlet were measured and found to vary from species to species and from place to place. Generally, levels of heavy metals in the animals from the middle part of the Burry Inlet (around Llanelli) are higher than in other parts. The levels of heavy metals in the animals found in the Burry Inlet are generally lower than in the Bristol Channel and South West England estuaries. An investigation was also made into the effects of different heavy metals concentrations (Cd, Cu, Zn) upon the amphipod Corophium arenarium (Crustacea) under various conditions of salinity and temperature, in which the LC5 value (50% lethal concentration) and survival rate (LT50 value or 50% lethal time 2nd LT value or 100% lethal time) were determined. It was found that, at both low salinity and high temperature, the effects are more severe than high salinity and low temperature.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available