Spatial distribution of agricultural pesticide use and predicted wetland exposure in the Canadian Prairie Pothole Region

2020 ◽  
Vol 718 ◽  
pp. 134765 ◽  
Author(s):  
Egina Malaj ◽  
Karsten Liber ◽  
Christy A. Morrissey
1989 ◽  
Vol 67 (2) ◽  
pp. 291-297 ◽  
Author(s):  
Douglas H. Johnson ◽  
Alan B. Sargeant ◽  
Raymond J. Greenwood

We followed 3094 upland nests of several species of ducks. Clutches in most nests were lost to predation. We related daily nest predation rates to indices of activity of eight egg-eating predators, precipitation during the nesting season, and measures of wetland conditions. Activity indices of red fox (Vulpes vulpes), striped skunk (Mephitis mephitis), and raccoon (Procyon lotor) activity were positively correlated, as were activity indices of coyote (Canis latrans), Franklin's ground squirrel (Spermophilus franklinii), and black-billed magpie (Pica pica). Indices of fox and coyote activity were strongly negatively correlated (r = −0.51), as were those of badger (Taxidea taxus) and skunk (r = −0.46). Nest predation rates in the early part of the breeding season were positively related to indices of fox, American crow (Corvus brachyrhynchos), and badger activity. Predation rates in the latter part of the season were positively related to indices of fox and skunk activity. Predation rates on early-season nests were lower in areas and years in which larger fractions of seasonal wetlands contained water. For late-season nests, a similar relationship held involving semipermanent wetlands. We suspect that the wetland measures, which reflect precipitation during some previous period, also indicate vegetation growth and the abundance of buffer prey, factors that may influence nest predation rates.


2002 ◽  
Vol 66 (4) ◽  
pp. 993 ◽  
Author(s):  
Kevin M. Podruzny ◽  
James H. Devries ◽  
Llwellyn M. Armstrong ◽  
Jay J. Rotella

2011 ◽  
Vol 45 (39) ◽  
pp. 7227-7234 ◽  
Author(s):  
Paul G. Messing ◽  
Annemieke Farenhorst ◽  
Don T. Waite ◽  
D.A. Ross McQueen ◽  
James F. Sproull ◽  
...  

Water ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1657 ◽  
Author(s):  
Ameer Muhammad ◽  
Grey Evenson ◽  
Tricia Stadnyk ◽  
Alaba Boluwade ◽  
Sanjeev Jha ◽  
...  

The Prairie Pothole Region (PPR) of Canada contains millions of small isolated wetlands and is unique to North America. The goods and services of these isolated wetlands are highly sensitive to variations in precipitation and temperature. We evaluated the flood proofing of isolated wetlands (pothole wetlands) under various climate change scenarios in the Upper Assiniboine River Basin (UARB) at Kamsack, a headwater catchment of the Lake of the Prairies in the Canadian portion of the PPR. A modified version of the Soil Water Assessment Tool (SWAT) model was utilized to simulate projected streamflow under the potential impacts of climate change, along with changes to the distribution of pothole wetlands. Significant increases in winter streamflow (~200%) and decreases (~11%) in summer flow, driven by changes in future climates, were simulated. Simulated changes in streamflow resulting from pothole removal were between 55% for winter and 15% for summer, suggesting that climate will be the primary driver in the future hydrologic regime of the study region. This research serves as an important guide to the various stakeholder organizations involved in quantifying the aggregate impacts of pothole wetlands in the hydrology of the Canadian Prairie Region.


Geoderma ◽  
2014 ◽  
Vol 235-236 ◽  
pp. 199-211 ◽  
Author(s):  
Dan Pennock ◽  
Angela Bedard-Haughn ◽  
Jeremy Kiss ◽  
Garth van der Kamp

Geoderma ◽  
2010 ◽  
Vol 155 (3-4) ◽  
pp. 308-319 ◽  
Author(s):  
Dan Pennock ◽  
Thomas Yates ◽  
Angela Bedard-Haughn ◽  
Kim Phipps ◽  
Richard Farrell ◽  
...  

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