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WSP11863
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WSP11863
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Last modified
1/26/2010 3:19:08 PM
Creation date
10/12/2006 5:14:41 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8200.750
Description
San Juan River General
State
CO
Basin
San Juan/Dolores
Water Division
7
Date
8/1/1986
Author
USFS
Title
Wolf Creek Valley Ski Area - Revised Draft - Environmental Impact Statement - San Juan National Forest - 1986 - Chapter IV to end
Water Supply Pro - Doc Type
Report/Study
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<br />nO?HO <br /> <br />areas where habitats would be improved and the potential for <br />supplying the needs of wild animals would be increased. <br />Numerous habitats have been improved for many different <br />species by designing timber sales whereby cover/forage ratios <br />have been improved, forage production has increased and/or <br />shelter has been provided. <br /> <br />b. Alternative One <br /> <br />Based upon the R2HABC!\P analysis, the following habitat capability <br />potentials are available. These potential habitat capabilities <br />have been generated from the acres of habitat discussed under the <br />previous section '~ildlife Habitats." <br /> <br /> Season of Current Alternatives <br />l'ipecies Use Situation ~ nm. ~ <br />Black Bear Surmner 4 3 3 3 <br />Mtn. Bluebird Sumrre r 1004 869 922 910 <br />Mule Deer Surmner 297 260 275 275 <br />Elk Sumrre r 80 42 44 44 <br />Goshawk Surmner 1 1 1 I <br />Blue Grouse Sumrrer 208 207 200 200 <br />Blue Grouse Winter 57 57 47 44 <br />Pine Grosbeak Sumrrer 1409 1235 1027 1027 <br />pine Grosbeak Winter 2035 1738 1446 1493 <br />pine Marten Year-round 9 8 7 7 <br />Southern Red <br />Backed Vole Year-round 135,642 118,924 95,653 95,653 <br /> <br />These numbers show only minor changes in habitat capabilities; <br />however, we know from past experience that the effects upon wild <br />populations of animals are generally much more drastic due to <br />harassment. The only species in the HABCAP model which shows a <br />large reaction to harassment is elk and this is mainly due to road <br />density (miles of road per section). This accounts for a large <br />part of reduction in the number of elk from the current situation <br />where there are 0.5 miles of road/section to Alternative One where <br />there is anticipated to be 2.3 miles of road/section. (Although <br />the highest density of roads will occur on private land, the model <br />"spreads" the roads throughout the project area). The reduction in <br />numbers occurs primarily because of the animals' responses to the <br />various disturbance and harassment factors that accanpany the <br />changes to their habitats. However, the degree or amount of <br />effect caused by harassment or disturbance is very difficult to <br />assess for the following reasons: 1) Different species of animals <br />react differently to the same type of harassment; 2) Animals may <br />react differently based on the time of year, i.e., winter versus <br />surmner, or birthing and rearing of young versus the rest of the <br />year; 3) They may react differently deperrling upon how limited <br />their overall habitat is or how limited a certain habitat aspect <br />is, i.e., calving habitat; 4) ~lany species of animals eventually <br /> <br />203 <br />
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