2020-01-21_PERMIT FILE - M2019046 (5)

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12/9/2019 ESD Printable Report among communities.Bold lines surrounding each plant community or communities represent ecological thresholds.The ecological processes will be discussed in more detail in the plant community descriptions following the diagram. Reference Plant Community This plant community is the interpretive plant community for this site and is considered to be the Reference Plant Community.This community evolved with herbivory by large herbivores and is well suited for grazing.Historically,fires occurred infrequently.This plant community can be found on areas that are grazed and where the grazed plants receive adequate periods of recovery during the growing season.The potential vegetation is about 80-95%grasses and grass-likes,3-10%forbs and 2-10%woody plants. The community is dominated by tall and mid warm and cool season grasses.Major grasses include alkali sacaton,switchgrass,prairie cordgrass and western wheatgrass.Other grasses and grass-likes occurring on the community include big bluestem,vine mesquite,little bluestem,alkali cordgrass,Canada wildrye,Baltic rush and Nebraska sedge.Key forbs and shrubs include American licorice,prairie gentian, rag sumpweed, Illinois bundleflower,rubber rabbitbrush,and fourwing saltbush. The high water table supplies much of the moisture for plant growth.Plant litter is properly distributed with little movement and natural plant mortality is very low.This is a sustainable plant community in terms of soil stability,watershed function and biologic integrity. Total annual production ranges from 1500 to 3700 pounds of air-dry vegetation per acre and will average 2600 pounds during an average year. Reference Plant Community Plant Species Composition Grass/Grasslike Annual Production (ggynds cer acre) Group Group name Common name $ym 1 Scientific name Low High 2080 2470 Grass-like,perennial 2GLP 25 80 Grass,perennial 2GP 25 80 big bluestem ANGE Andropogon gorardii 25 130 Nebraska sedge CANE2 Carex nebrascensis 25 80 saltgrass DISP Distichlis spicata 25 80 Canada wildrye ELCA4 Elymus canadensis 25 80 slender wheatgrass ELTR7 Elymustrachycaulus 0 80 foxtail barley HOJU Hordeum jubatum 0 25 mountain rush JUARL Juncus arcticus subsp.littoralis 25 80 scratchgrass WAS Muh/enbergia aspenfolia 0 25 marsh muhly MURA Muhlenbergia racemosa 0 25 vine mesquite PAOB Panicum obtusum 50 130 western wheatgrass PASM Pascopyrurn smith ii 390 650 switchgrass PAVI2 Panicum virgatum 520 780 Nuttall's alkaligrass PUNU2 Puccinellia nuttalliana 25 80 little bluestem SCSC Schizachyrium scoparium 0 80 Indiangrass SONU2 Sprrghastrum nutans 25 80 alkali sacaton SPAI SPorobolus airoides 910 1040 alkali cordgrass SPGR SpQd na gr cili 25 80 prairie cordgrass SPPE Spartina pectinata 260 390 Forb Annual Production (pounds per acre) Group Group name Common name ,$ymbol Scientific name LOW High 2 80 260 Forb,perennial 2FP 25 80 false boneset BREU Brickellia eupatorioides 0 25 CYXA Cyclachaena xanthifolia 0 80 Illinois bundleflower DEIL Desmanthus illinoensis 25 50 showy prairie gentian EUEXR Eustome exaltatum subsp. 0 50 russellianum GAM05 Gaura mollis 0 25 American licorice GLLE3 alycymhiza lepidota 25 130 leafy false goldenweed OOFOF Oononsis folios?var folios? 0 25 giant goldenrod SOGI So t gggigantea 0 25 SymphyoMchum ericoides var white heath aster SYERE n ide 0 25 Shrub/Vine Annual Production (pounds per acre) Group Group name Common name $ymbol Scientific name LOW High 3 50 260 Shrub(>.5m) 2SHRUB 25 80 fourwing saltbush ATCA2 A lex canescens 0 130 rubber rabbitbrush ERNAN5 Encamena nauseosa vac 25 50 nauseosa greasewood SAVE4 Sarcobatus vermiculatus 0 25 Annual Production by Plant Type Annual Production fts/ac) Representative Plant type Low value High Forb 75 170 275 https://esis.sc.egov.usda.gov/ESDReport/fsReportPrt.aspx?id=R069XY03000&rptLevei=all&approved=yes&repType=regular&scrns=&comm= 5/15