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Last modified
7/14/2009 5:02:36 PM
Creation date
5/18/2009 12:46:29 AM
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UCREFRP
UCREFRP Catalog Number
9574
Author
Miller, W. J. and D. E. Rees.
Title
Survey of Fish, Benthic Macrovertebrates, and Habitat in Elkhead Creek near Craig, Colorado.
USFW Year
1996.
USFW - Doc Type
Fort Collins, CO.
Copyright Material
NO
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1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />Elkhead Creek Aquatic Resource Report <br />Miller Ecological Consultants, December 5, 1996 <br />Table 4. Physical habitat codes for Basinwide habitat mapping data. <br />13 <br />Basinwlde_Habitat Number <br />Habitat I)cscription <br />1 Glide <br />2 Secondary Channel Pool <br />3 Backwater Pool <br />4 Trench Pool <br />5 Phinge Pool <br />6 Lateral Scour Pool <br />7 Dain Pool <br />8 Secondary Channel Riffle <br />9 Riffle associated with Bedrock <br />10 Riffle associated with Boulders <br />11 Riffle associated with Cobble <br />12 Rife associated with Gravel <br />13 Riffle associated with Sand or Silt <br />14 Rapid <br />15 Cascade <br />Average depth and maximum depth of the various habitat types appear to be similar <br />between the two sites (Table 5). Substrate in pools was similar at Sites 1 and 2, but <br />substrate size in glides and riffles was considerably larger at Site 2 (Table 6). Bank <br />stability and rock content varied somewhat between sites (Appendix C); however, the <br />total feet of eroding banks was considerably greater at Site 1 (380 ft) than Site 2 (60 ft). <br />Three types of cover were described at Site I in pool and glide habitat. Cover types at <br />Site 1 included instream cover, overhead cover and pool depth cover. Cover types at Site <br />2 included instream cover and pool depth cover. The most common occurring cover type <br />at both sites was depth cover confined to the pools. Site 2 contained approximately twice <br />as much quantifiable cover as Site I (Table 7). <br />In many ways habitat appears to be very similar between Sites 1 and 2. It is likely that the <br />differences between the two sites may be the result of grazing pressure at Site 1. Although <br />the differences in. most cases are slight, Site 1 has less cover, less pool habitat, and more <br />eroding stream banks. These conditions are often attributed to the effects of grazing.
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