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Ecological effects of river ice break-up: a review and perspective
The potential importance of break-up on water temperature, river sediments and geomorphology, riverine energy sources, contaminants, and its effects on river biota and food-web dynamics are evaluated. Expand
Nutrient enrichment of northern rivers in response to pulp mill and municipal discharges
To evaluate the effects of pulp mill and municipal sewageeffluents on the nitrogen (N) and phosphorus (P) status of northernCanadian rivers, the Northern River Basins Study required anExpand
Landscape variables influencing nutrients and phytoplankton communities in Boreal Plain lakes of northern Alberta: a comparison of wetland- and upland-dominated catchments
Higher Chlorophyta and Peridineae biomasses in wetland-dominated systems than in upland-dominated ones may coincide with greater NH4 + availability. Expand
Diet, food resource partitioning and feeding periodicity of two riffle-dwelling fish species in a New Zealand river
The diets and feeding periodicities of two small, riffle-dwelling fish, the torrentfish and the bluegilled bully, were investigated in an unstable, braided New Zealand river and it was indicated that the feeding periodicity of the two species differed. Expand
Did the first insects live in water or in air
The great variation in gill structure, even within orders, suggests convergence, and the more or less completely aquatic life histories are better interpreted as steps towards independence from land, rather than signs of an aquatic origin. Expand
Feeding while evading predators by a lotic mayfly: linking short-term foraging behaviours to long-term fitness consequences
Results suggest that behavioural costs of balancing mortality risk due to predation against food acquisition by B. tricaudatus can have strong fitness consequences, and that patches that were utilized the most were those that yielded the highest fitness benefits. Expand
Development and application of a nutrient‐diffusing bioassay for large rivers
1. Laboratory and field experiments were performed to develop and then apply a nutrient-diffusing substratum (NDS) design suitable for use in large, fast-flowing rivers. 2. Initial laboratoryExpand
Genetic diversity and structure in Canadian northern leopard frog (Rana pipiens) populations: implications for reintroduction programs
There was no significant relationship between genetic and geographic distance, suggesting that genetic drift is a driving force affecting the genetic relationships between populations, and diversity was highest in Manitoba and western Ontario and declined westward. Expand
Bull trout (Salvelinus confluentus) occurrence and abundance influenced by cumulative industrial developments in a Canadian boreal forest watershed
It is forecasted that forest harvesting over the next 20 years is projected to result in the local extirpation of bull trout from 24% to 43% of stream reaches that currentlocated in the Kakwa River Basin, Alberta. Expand
Older is Better: Beaver Ponds on Boreal Streams as Breeding Habitat for the Wood Frog
Results from a laboratory experiment suggest that higher concentrations of dissolved oxygen characteristic of old ponds can enhance larval growth rates, and older beaver ponds may support more breeding wood frogs due to adult selection for open-canopy ponds and the associated larval environments favourable for high rates of juvenile recruitment. Expand