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REP44072
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REP44072
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Entry Properties
Last modified
8/25/2016 12:46:25 AM
Creation date
11/27/2007 10:07:52 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981041
IBM Index Class Name
Report
Doc Date
8/31/1993
Doc Name
POWDERHORN COAL CO ROADSIDE REFUSE DISPOSAL AREA FIELD TRIAL EVALUATION OF TEST PLOT VEGETATION AND
Permit Index Doc Type
REVEG MONITORING REPORT
Media Type
D
Archive
No
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<br /> <br />Bromus japonicus/tectorum at 33.6% mean cover (78.3Y'o relative cover) was the <br />dominant grass species. Agropyron cristatum at 2.03'o mean cover (4.43'o relative <br />cover) and Agropyron smithii with 0.4% mean cover and 0.88% relative cover were the <br />other grasses present in this transect. <br />Annual forbs were represented by three species in this transect. IJiescurainia Sophia <br />comprised 2.8% mean cover (6.2% relative cover), Ceratocephala orthoceras 0.8% <br />mean cover (1.84'o relative), and Chorispora tenella (Blue Mustard) accounted for <br />0.4% mean and 0.9% relative cover. <br />The woody shrubs Atriplex rnnfertifolia and AtripJex canescens each accounted for <br />1.6% mean cover and 4.0% and 3.5 % relative cover respectively. <br />Herbaceous Production <br />Total herbaceous production was 81.16 g/mz (722.32 Ib/ac) on this treatment plot. <br />Bromus japonicus/tectorum dominated the herbaceous production at 50.88 g/m2 or <br />62.7% of total production. The perennial grasses Agropyron cristatum and Elymus <br />junceus accounted for 15.16 g/m2 and 18.7% of total production. Chorispora tenella <br />accounted for 10.26 g/m2 total production. Annual forbs (including Chorispora <br />tenella) produced 15.12 g/mz for 18.6% of the total herbaceous production. Table 14 <br />contains herbaceous production results for this treatment. <br />Woody Plant Density and Dimensiotu <br />Three woody plant species on this plot were represented by 83 individuals, providing a <br />density of 786/acre. Nearly equivalent in numbers were Atriplex canescens and <br />Atrip/ex conlertifolia, followed by Sarcobatus rermicu/atus. The largest woody plant <br />was an AtripJex canescens individual measuring 91 cm high and 134 cm in diameter. <br />Woody Plant information is presented in Tables 29 and 30. <br />Species Diversity <br />Five lifeforms were represented on this treatment plot. Perennial and annual grasses <br />were represented by two and one species respectively, annual forbs by three species, <br />woody plants with two species, and cryptogams by one species. Of these lifeforms, <br />perennial grasses, annual grasses, and annual forbs were each represented by one <br />species with greater than three percent relative cover while woody plants had two <br />species accounting for greater than three percent relative cover. <br />36 <br />
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