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12/9/2019 ESD Printable Report <br /> '° Gf ."C — <br /> % ;a <br /> F a- <br /> f 2b <br /> a <br /> u <br /> c 1b <br /> t <br /> i <br /> o a <br /> n } <br /> At Risk Plant Community <br /> This plant community developed with recurring seasonal herbivory without adequate recovery opportunity during the growing season. Blue <br /> grama has increased and is the dominant species.Big bluestem,Prairie sandreed,sand bluestem and switchgrass have been reduced. Little <br /> bluestem and sideoats grama are still present as secondary grasses.American vetch,purple prairie clover,leadplant,western sandcherry, <br /> true mountain mahogany and currants are present in reduced amounts.Needleandth read,western wheatgrass and New Mexico feathergrass <br /> may initially increase or decrease depending on the season of grazing use.Louisiana sagewort,western ragweed,hairy goldaster,slimflower <br /> scurfpea,small soapweed and fringed sagebrush have increased.The tree component has increased slightly. <br /> Plant frequency,vigor and production have decreased. Reduction of tall,mid and rhizomatous wheatgrass,nitrogen-fixing forbs,shrub <br /> component and increased warm season short grass has begun to alter the biotic integrity of this community.Water and nutrient cycles are <br /> becoming impaired.Litter levels have been reduced.Wind scoured areas and pedestalled plants may be evident. <br /> Total annual production,during an average year,ranges from 300 to 900 pounds of air-dry weight and will average 550 pounds. <br /> Plant Growth Curve <br /> Growth curve number: C06905 <br /> Growth Curve name: Warm season dominant,cool season sub-dominant;MLRA-69;upland coarse textured soils <br /> Growth curve description: <br /> Percent Production by M�n-1h <br /> Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec <br /> 0 0 5 10 22 35 15 10 3 0 0 0 <br /> - CifONLII CYIYY <br /> 4� <br /> F. :a <br /> r 24 <br /> d <br /> u I-r <br /> C <br /> t <br /> i <br /> �JHf = - Pi• - - - - <br /> Low Plant Density, Decadent Plants Plant Community <br /> This plant community developed under many years of non-use(rest)and lack of fire. Plant species resemble the reference plant community <br /> however,frequency and production will be reduced.Eventually,litter levels can become high enough to cause stagnation and mortality of <br /> various species such as Indiangrass,sand bluestem,switchgrass and little bluestem. Bunchgrasses typically develop dead centers and <br /> rhizomatous grasses can form small decadent communities due to a lack of stimulation by grazing animals.Some plants are inaccessible to <br /> grazing due to topography and rocky conditions thereby enhancing plant decadence and mortality. <br /> Management changes can easily shift this plant community toward the reference plant community.Non-disturbance will initially increase litter <br /> levels, minimizing soil erosion.In advanced stages of non-use(rest)or lack of fire,plants will begin to die off and bare areas will increase <br /> causing an erosion concern.This plant community is uncommon in the natural range of variability. <br /> Total annual production can vary from 150 to 800 pounds of air-dry vegetation per acre and will average 350 pounds during an average year. <br /> Plant Growth Curve <br /> Growth curve number. C06906 <br /> Growth Curve name: Warm season dominant,cool season sub-dominant,excess litter;MLRA-69;upland coarse textured soils <br /> Growth curve description: <br /> Percent Production by Month <br /> https://esis.sc.egov.usda.gov/ESDReport/fsReportPrt.aspx?id=RO69XY053CO&rptLevel=all&approved=yes&repType=regular&scrns=&comm= 10/19 <br />