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Habitat Diversity

Figure 1. NetMap’s Habitat Diversity tool employs a user defined “window” that encompasses at least eight channel segments (of variable length).  Within the sample window, the standard deviation is calculated for the specified parameters to create an index of habitat diversity. 
Figure 2. NetMap’s Habitat Diversity tool can be applied to channels or floodplains (1); for channels either at the scale of entire networks or just the fish-bearing portion. The user selects from one to a maximum of four parameters to include in the diversity calculation (2).  The length scale of the sampling window is specified (3).
Figure 3.  In this example the parameters of channel gradient, valley width, confluence effects, and near stream-roughness were used to estimate their combined standard deviation across multiple stream segments at a scale of approximately 1400 m, thereby creating an index of habitat diversity.
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