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Title: Ecological studies of trace metal distribution in the saltmarshes of the Burry Estuary
Author: Rojanavipart, P.
Awarding Body: University College of Swansea
Current Institution: Swansea University
Date of Award: 1981
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Studies of trace metal (Cd, Cu, Fe, Mn, Ni, Pb and Zn ) distributions in Spartina anglica, Halimione portulacoides, Puccinellia maritime, Salicornia spp., Fucus vesiculosus, Enteromorpha spp., faeces of horses and sheep, Littorina littorea, saltmarsh detritus and sediments were carried out in the Burry Inlet saltmarshes (South Wales) at various sites and during four different seasons in 1976. Samples of H. portulacoides, P. maritime, F. vesiculosus, Fhteromorpha spp., detritus and sediments were also collected from one non-saltmarsh site near the mouth of the River Tawe in central Swansea. The results show that the levels of trace metals in the saltmarsh angiosperms of the Burry Inlet are comparatively low compared with the levels found in F. vesiculosus, Enteromorpha spp., faeces of horses and sheep, detritus and sediments. The levels of most metals in biota and sediments vary from site to site and show smaller variations from season to season at any one site. The results show that, with respect to the metals that were investigated, the Burry Inlet is only a slightly contaminated estuary (mostly in its middle and inner regions) whilst contamination in the River Tawe is much more severe. General features of the ecology of the saltmarshes of the Burry Inlet are also described, including some ecological factors affecting the marshes. The combined effects of Cu, Zn and Na on the growth of Spartina anglica seedlings in a solution culture factorial experiment were also included in this study. The results show that plants are considerably more vulnerable to metal toxicity at high salinities. Growth was affected by copper levels of 3.2 ppm and above in full basic nutrient solution with 5 g NaCl/litre, but by copper levels of 0.32 ppm and above with 15 g NaCl/litre. Symptoms of leaf injury and inhibition of growth resulting from high levels of NaCl and copper were clearly exhibited in test plants. There were no visible effects from zinc treatments from 0.131 to 131 ppm with 5, 15 and 25 g NaCl/litre.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available