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Pesticides in Surface Drinking-Water Supplies of the Northern Great Plains
TLDR
Investigation of the occurrence of 45 pesticides in drinking water from reservoirs in this area that received water primarily from snowmelt and rainfall runoff from agricultural crop lands suggested that atmospheric deposition was the principal pathway from fields to the reservoirs. Expand
Conventional and conservation tillage: influence on seasonal runoff, sediment, and nutrient losses in the Canadian Prairies.
TLDR
The results suggest that management practices designed to improve water quality by reducing sediment and sediment-bound nutrient export from agricultural fields and watersheds can be less effective in cold, dry regions where nutrient export is primarily snowmelt driven and in the dissolved form. Expand
Occurrence of glyphosate and acidic herbicides in select urban rivers and streams in Canada, 2007
TLDR
This is the first time a national survey of pesticides in urban rivers has been carried out in a consistent fashion across Canada and concentrations of 2,4-D, mecoprop, dicamba, glyphosate, and AMPA were linked to urban use and frequently detected in all geographic areas. Expand
Northern Rivers Ecosystem Initiative: Nutrients and Dissolved Oxygen – Issues and Impacts
TLDR
Improved understanding of the interactions between nutrients, DO and aquatic ecosystem productivity and recommendations for revisions to nutrient and DO guidelines for these northern rivers are resulted in. Expand
Effects of metal mining effluent on Atlantic salmon (Salmo salar) and slimy sculpin (Cottus cognatus): using artificial streams to assess existing effects and predict future consequences.
TLDR
The 20% discharge predicted following mine reclamation is potentially favourable for the reinstitution of native fishes into the system, as well as the potential impacts ofMine reclamation. Expand
Assessing the responses of creek chub (Semotilus atromaculatus) and pearl dace (Semotilus margarita) to metal mine effluents using in situ artificial streams in Sudbury, Ontario, Canada.
TLDR
The artificial stream studies provided a mechanism to identify changes in the endpoints of relevant fish species exposed to present-day metal mine discharges independent of historical depositions of metals in the Sudbury area. Expand
Effects of pulp mill effluent on benthic assemblages in mesocosms along the Saint John River, Canada.
TLDR
Results from two trophic levels indicated that the main impact of these PME concentrations is nutrient enrichment rather than effluent toxicity, and suggest that benthic invertebrate and periphyton assemblages, algal biomass production, and insect emergence are sensitive response measures. Expand
Reduction of predation risk under the cover of darkness: Avoidance responses of mayfly larvae to a benthic fish
TLDR
Surprisingly, drift most often occurred before contact between predator and prey, and it is suggested that in darkness this mayfly may use hydrodynamic pressure waves for predator detection, rather than chemical cues, since fish forage in an upstream direction. Expand
Artificial Streams for Environmental Effects Monitoring (EEM): Development and Application in Canada over the Past Decade
Development of artificial stream systems has been an on-going research effort in Canada over the past decade. At the National Water Research Institute (NWRI) of Environment Canada, artificial streamExpand
An improved technique for sampling lotic invertebrates
TLDR
A U net sampler is described that produces more accurate estimates of faunal density of individual stones and is an effective tool for collecting quantitative samples of stream macroinvertebrates where traditional, area-restricted samplers are ineffective. Expand
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