Alteration of stream temperature by natural and artificial beaver dams.

Temperature restoration of salmonid habitat Many salmonid populations occupy streams environments that may be at or near their thermal threshold, and small deviations in temperature may be significant in determining the population productivity and/or long-term viability [ 7 , 8 ].

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This interaction is clear in our analysis of longitudinal temperature change, which showed a strong trend for decreasing summer maximum temperature downstream of areas with a high density of active beaver dams ( Table 5 , Figs 6 and 7 ).

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