

@mastersthesis {6718,
	title = {An investigation into aspects of the ecology of aquatic microfauna of two man-made lakes in {North} {East} {England}. ({BL}: {DXN}059095)},
	year = {2000},
	note = {U165015},
	school = {University of Newcastle Upon Tyne (United Kingdom)},
	type = {phdPh.{D}.},
	address = {Ann Arbor},
	abstract = {The following work presents the results of investigations into the aspects of zooplankton and aquatic macroinvertebrata ecology of two man-made reservoirs in NE England, Scaling Dam and Bakethin. Limnological studies of species composition and occurrence, and the underlying chemical characteristics of those water bodies were conducted in the years 1994-98. Both reservoirs are small oligotrophic water bodies, with low overall abundance of aquatic fauna present. The reservoirs were characterised by low overall nutrient content, with the phosphate level frequently below detection level, and the average pH levels of 7.5 and 7.6 respectively. The ecological investigations were conducted under the variety of environmental conditions present. Of particular interest were the developments of the aquatic communities after the periods of particular environmental stress, such as prolonged periods of cold weather and water level fluctuations (particularly noted in Scaling Dam), where the draw-down of the reservoir resulted in severe loss of habitat. This was followed by the observed severe depletion of animal abundance, and also diversity, particularly among macroinvertebrata community. The zooplankton composition was that of nutrient poor lakes with the low overall abundance of animals. The most numerous and widely distributed was Cladoceran Chydorus sphaericus. This ubiquitous animal was the dominant species in the littoral zone of both reservoirs. Daphnia magna was dominant in the pelagial zone of Bakethin reservoir, with slightly less numerous D. cucullata and Bosmina coregoni as the co-dominant species. The Copepoda assemblages were particularly notable for their absence of mature forms, the large part of individuals recorded were various stages of Copepodids and Nauplii larvae. This is probably attributable to overpredation, particularly in Scaling Dam. A rare species of Copepoda Diaptomus wierzejski was recorded from Scaling Dam reservoir. The Rotifera population of Scaling Dam was co-dominated by Kellicottia longispina and Keratella quadrata. The macroinvertebrata population of Scaling Dam is much more specific poor than that of Bakethin reservoir. This would appear to be a consequence of the severe environmental stress (water level fluctuations) and the relative isolation of the reservoir from other water bodies where the migration might compensate for the loss of animals. The dominant, most numerous species in those reservoirs were: Scaling Dam Mollusca Potamopyrgus jenkinsi and Bakethin reservoir Caddis L. lunata.},
	keywords = {0329:Ecology, Bibliographies, Biological sciences, DXN059095, Ecology, Psychology{\textendash}Abstracting, Statistics},
	url = {http://search.proquest.com/docview/301554097?accountid=14270},
	author = {Henderson, A}
}
