Whooping Crane Migrational Habitat Use Draft ‎(2)‎

• File Number: 8461.100
• Description: Adaptive Management Workgroup
• State: CO
• Basin: South Platte
• Water Division: 1
• Date: 8/6/2008
• Author: Shay Howlin, Clayton Derby, Dale Strickland, Western Ecosystems Technology, Inc.
• Title: Whooping Crane Migrational Habitat Use Draft
• Water Supply Pro - Doc Type: Report/Study

W(x) = exp[-7.319 + (2.028*P_OW) + (0.067*P_WC) + (0.055*P_AG) + (0.003*trdist) +
(0.0393*sfdist) - (0.001* sfdist2)]
The standard errors for the coefficients were 1.04, 0.52, 0.02, 0.01,< 0.01, 0.01, and <0.01 for the
intercept, percent of open water, the percent of wetted channel, the percent of agriculture,
transportation distance, linear effect of shrub and forest distance, and the quadratic effect of
shrub and forest distance respectively. This model indicated significant selection for in-channel
areas with large proportions of open water, wetted channel, and agriculture. There was an
increased relative probability of selection for areas far from transportation features, and the
relative probability of selection increased for large distances to shrub and forest with the rate of
increase slowing as the distances to shrub and forest reached the largest values in the dataset
(Figure 20).
Local area selection of land cover
The final resource selection model, w(x), for all observations (wetted channel and upland)
contained the linear effects of percent of wetted channel within 0.25 miles (P_WC), percent of
open water within 0.25 miles (P_OW), and indicators for wetted channel and agriculture. The
form of the final model for wetted channel was:
W(x) = exp [2.496 + (0.124*P_WC) + (1.371*P_OW)]
The standard errors for the coefficients were 0.49, 0.02, and 0.14 for wetted channel indicator,
percent wetted channel, and percent of open water respectively. The form of the final model for
agriculture was:
W(x) = exp [2.449 + (0.124*P_WC) + (1.371 *P_OW)]
The standard errors for the coefficients were 0.60, 0.02, and 0.14 for agriculture indicator,
percent wetted channel, and percent of open water respectively. And the form of the final model
for all other land cover types was:
W(x) = exp [(0.124*P_WC) + (1.371*P_OW)]
The standard errors for the coefficients were 0.02, and 0.14 for percent wetted channel, and
percent of open water respectively. This model indicated significant selection for local areas with
large proportions of wetted channel and open water, as well as for the wetted channel and
agriculture cover types.
Local in-channel selection of land cover
The final resource selection model, w(x), for in-channel selection contained the linear effects of
percent of open water within 0.25 miles (P_OW), percent of wetted channel within 0.25 miles
(P_WC), and the linear and quadratic effects of distance to transportation (trdist). The form of
the final model was:
W(x) = exp(3.367*P_OW) + (0.121 *P_WC) - (0.005*trdist) + (0.001 *trdist_2)
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