Agricultural chemicals and prairie pothole wetlands : D.J Forsyth meeting the needs of the resource and the farmer - Canadian perspective /
Material type:
TextPublication details: Saskatoon, SK : 1989. Canadian Wildlife Service,Description: 1 v. (various pagings) ; 28 cmOnline resources: Abstract: Approximately 64 percent of the total area of the prairie pothole region is located in Canada, and provides breeding habitat for 16 million of the North American duck population of 62 million (Anonymous 1986,Sheehan et al. 1987). There are an estimated (Gollop 1964) 10 million depressions capable of holding water in the pothole region of Canada,with as many as 189 per square mile and a mean of 46 per square mile.The pothole region lies entirely within the intensively cultivated farmland of Alberta, Manitoba and Saskatchewan, where wheat is the main crop. This overlap has resulted in the loss of 40 percent of original wetlands since settlement began (Anonymous 1986). Monitoring of over 10,000 potential wetlands across the Canadian prairies from 1981 to 1985 for degradation caused by haying, grazing burning, draining, filling,cultivation and clearing showed that the percentage of degraded basins increased from 57 percent to 59 percent, and that degraded margins increased from 74 per
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Electronic Report
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Electronic Library | Non-fiction | FOR (Browse shelf(Opens below)) | Available | 977 |
Includes bibliographical references.
Approximately 64 percent of the total area of the prairie pothole region is located in Canada, and provides breeding habitat for 16 million of the North American duck population of 62 million (Anonymous 1986,Sheehan et al. 1987). There are an estimated (Gollop 1964) 10 million depressions capable of holding water in the pothole region of Canada,with as many as 189 per square mile and a mean of 46 per square mile.The pothole region lies entirely within the intensively cultivated farmland of Alberta, Manitoba and Saskatchewan, where wheat is the main crop. This overlap has resulted in the loss of 40 percent of original wetlands since settlement began (Anonymous 1986). Monitoring of over 10,000 potential wetlands across the Canadian prairies from 1981 to 1985 for degradation caused by haying, grazing burning, draining, filling,cultivation and clearing showed that the percentage of degraded basins increased from 57 percent to 59 percent, and that degraded margins increased from 74 per