The role of wetland heterogeneity in the regulation of duck populations in eastern Ontario / James H. Patterson
Material type:
TextSeries: Thesis. (Ph.D.)Publication details: Ottawa, ON : Carleton University, 1972.Online resources: Abstract: Both behavioural spacing of breeding pairs, and the availability of energy resources have been proposed as major regulatory mechanisms of duck populations. In order to compare the relative importance and interaction of the two mechanisms, the distribution of duck populations was determined in a heterogeneous system of beaver ponds. The study area was located approximately 20 miles west of Ottawa, Ontario, in the vicinity of a contact of the Ottawa-St. Lawrence Lowland and the Precambrian Shield. Ponds were selected from a number of geological substrates, so that within a relatively small geographical area a wide variety of chemical conditions were represented. All pond waters were of the calcium bicarbonate type, with the cation composition generally being of the order Ca>Mg>Na>K. In the hard water sedimentary ponds the concentrations of all major ions were highly variable, in response to the composition and solubility of the local bedrock. In the more dilute Precambrian ponds, calciu
| Item type | Current library | Collection | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|---|
Book
|
Amherst Office Stacks | Non-fiction | PAT (Browse shelf(Opens below)) | Available | 13980 | |
Electronic Report
|
Electronic Library | Non-fiction | PAT (Browse shelf(Opens below)) | Available | 1558 |
Browsing Amherst Office shelves, Shelving location: Stacks Close shelf browser (Hides shelf browser)
Thesis(Ph.D.)--Carleton University, 1972.
Includes bibliographical references.
Both behavioural spacing of breeding pairs, and the availability of energy resources have been proposed as major regulatory mechanisms of duck populations. In order to compare the relative importance and interaction of the two mechanisms, the distribution of duck populations was determined in a heterogeneous system of beaver ponds. The study area was located approximately 20 miles west of Ottawa, Ontario, in the vicinity of a contact of the Ottawa-St. Lawrence Lowland and the Precambrian Shield. Ponds were selected from a number of geological substrates, so that within a relatively small geographical area a wide variety of chemical conditions were represented. All pond waters were of the calcium bicarbonate type, with the cation composition generally being of the order Ca>Mg>Na>K. In the hard water sedimentary ponds the concentrations of all major ions were highly variable, in response to the composition and solubility of the local bedrock. In the more dilute Precambrian ponds, calciu