9575

• UCREFRP Catalog Number: 9575
• Author: LaGory, K. E. and R. A. V. Lonkhuyzen.
• Title: Potential Effects of Four Flaming Gorge Dam Hydropower Operational Scenarios on Riparian Vegetation of the Green River, Utah and Colorado.
• USFW Year: 1995.
• USFW - Doc Type: \
• Copyright Material: NO

TABLE 4 Relative Abundance of Plant Species or Taxa at Different Elevations above the Green River at Low Flow'
Percent of Sampling Points Occupied at Different Elevations above the Riverd
All
Species or Taxonb N` 0.0-0.9 ft 1.0-1.9 ft 2.0-3.9 ft 4.0-5.9 ft 6.0-9.9 ft 10.0-13.9 ft >13.9 ft Elevations
Elevation (ft)
Mean Range
Artemisia 99 0.00 0.31 1.58 11.86 16.87 11.84 9.23 6.37 8.5 2-19
Box elder 173 0.00 0.00 0.40 4.12 25.10 38.82 33.85 11.13 12.7 4-32
Canada thistle 82 0.00 2.16 22.92 6.70 0.82 1.32 0.00 5.27 3.7 2-13
Carex 116 1.93 2.47 30.43 10.31 1.65 1.32 0.00 7.46 3.7 0-11
Cattail 44 4.25 10.19 0.00 0.00 0.00 0.00 0.00 2.83 1.6 1-2
Common plantain 31 0.77 8.02 1.19 0.00 0.00 0.00 0.00 1.99 1.8 1-4
Common reed 29 0.39 0.31 0.79 8.25 3.70 0.00 0.00 1.86 5.4 0-10
Common spikerush 172 24.32 29.94 3.95 1.03 0.00 0.00 0.00 11.06 1.4 0-5
Coyote willow 128 0.39 8.02 36.36 3.61 0.82 0.00 0.00 8.23 3.1 1-7
Field horsetail 90 1.54 14.20 7.51 7.73 1.23 1.97 0.00 5.79 2.9 1-14
Giant whitetop 51 0.00 1.23 4.35 10.31 5.76 1.32 0.00 3.28 5.2 1-10
Golden aster 69 0.00 0.00 1.19 6.19 14.81 9.21 3.08 4.44 8.3 4-18
Grasses 722 9.27 33.64 54.55 67.01 61.32 69.08 51.54 46.43 6.7 0-34
uncus 28.40 30.83 15.46 13.17 0.66 0.00 17.30 3.1 0-11
Rabbitbrush 70 0.00 0.00 1.98 0.52 6.58 23.68 9.23 4.50 11.2 3-18
Scirpus 94 6.18 16.67 7.51 2.58 0.00 0.00 0.00 6.05 2.0 1-5
Scouring rush 244 0.77 3.09 10.67 52.06 31.28 18.42 0.00 15.69 6.3 1-13
Silverweed 65 2.70 5.86 13.44 2.58 0.00 0.00 0.00 4.18 2.5 0-6
Sow thistle 85 0.00 1.54 31.23 0.52 0.00 0.00 0.00 5.47 3.1 1-5
Stinking povertyweed 38 0.00 0.31 7.11 9.28 0.41 0.00 0.00 2.44 4.4 2-6
Tamarisk 110 0.00 6.79 7.11 23.71 9.88 0.00 0.00 7.07 4.5 1-9
Western goldenrod 199 1.54 32.72 18.18 21.13 0.82 0.00 0.00 12.80 2.7 0-7
Wild licorice
-------------- 59
----- 0.00
--------- 0.00
--------- 17.79
--------- 4.12
--------- 2.06
---------- 0.66
---------- 0.00
--------- 3.79
----------- 4.0
--- ----- 2-10
-------
Number of sampling points 259 324 253 194 243 152 130 1,555 - -
Percent of sampling points 16.66 20.84 16.27 12.48 15.63 9.77 8.36 100.00
a Low flow = 800 cfs.
b Only species or taxa with 25 or more observations are included.
c N = number of sampling points where species or taxon was observed.
d Only transects upstream of the Yampa River confluence are presented.
NO
U,