Relationships between aquatic macroinvertebrate populations and water chemical concentrations in beaver ponds overlying Precambrian and Ordovician bedrock / James Howard Patterson.
Material type:
TextSeries: Thesis. (M.Sc.)Publication details: Ottawa, ON : Carleton University, 1969.Description: xii, 247 p. : ill. ; maps ; 28 cmOnline resources: Abstract: Relationships between aquatic macroinvertebrate populations and the concentrations of certain inorganic water chemicals were investigated in six active beaver ponds, west and south of Ottawa, Ontario. Three of the ponds are situated over dolomitic bedrock of the Ordovician Oxford Formation and three are located in the Grenville sub-province of the Precambrian Shield. Water chemical concentrations were determined in each pond at monthly intervals from May to September in 1966 and from April to August in 1967. The concentrations of water chemicals were related to biotic and abiotic components of the pond ecosystems. The nature of the parent substrate was found to be a major factor controlling the concentrations of certain chemicals. For example, the Oxford dolomite contributed high levels of calcium and magnesium to the pond waters. Allforms of the granitic gneiss contributed low amounts of magnesium, but a sub-unit of the gneiss containing pyroxenite and marble gave calcium concentrati
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Includes bibliographical references. (p. 183-189).
Relationships between aquatic macroinvertebrate populations and the concentrations of certain inorganic water chemicals were investigated in six active beaver ponds, west and south of Ottawa, Ontario. Three of the ponds are situated over dolomitic bedrock of the Ordovician Oxford Formation and three are located in the Grenville sub-province of the Precambrian Shield. Water chemical concentrations were determined in each pond at monthly intervals from May to September in 1966 and from April to August in 1967. The concentrations of water chemicals were related to biotic and abiotic components of the pond ecosystems. The nature of the parent substrate was found to be a major factor controlling the concentrations of certain chemicals. For example, the Oxford dolomite contributed high levels of calcium and magnesium to the pond waters. Allforms of the granitic gneiss contributed low amounts of magnesium, but a sub-unit of the gneiss containing pyroxenite and marble gave calcium concentrati