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Ecological site R053CY002SD

Linear Meadow

Last updated: 11/15/2024
Accessed: 11/21/2024

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General information

Provisional. A provisional ecological site description has undergone quality control and quality assurance review. It contains a working state and transition model and enough information to identify the ecological site.

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Figure 1. Mapped extent

Areas shown in blue indicate the maximum mapped extent of this ecological site. Other ecological sites likely occur within the highlighted areas. It is also possible for this ecological site to occur outside of highlighted areas if detailed soil survey has not been completed or recently updated.

MLRA notes

Major Land Resource Area (MLRA): 053C–Southern Dark Brown Glaciated Plains

The Southern Dark Brown Glaciated Plains (53C) is located within the Northern Great Plains Region. It is entirely in South Dakota encompassing about 3,990 square miles (Figure 1). The elevation ranges from 1,300 to 2,300 feet. The MLRA is level to gently rolling till plains including many areas of potholes. A terminal moraine occurs in the southern end of the MLRA. Moderately steep and steep slopes are adjacent to the major valleys. The headwaters of many creeks in central South Dakota occur in the high-lying MLRA. (USDA-NRCS 2006).

The dominant soil orders in this MLRA is Mollisols and Inceptisols. The soils in the area dominantly have a mesic soil temperature regime, an ustic soil moisture regime, and mixed or smectitic mineralogy. They generally are very deep, well drained or moderately well drained, and are loamy or clayey. This area supports natural prairie vegetation characterized by western wheatgrass (Pascopyrum smithii), big bluestem (Andropogon gerardii), needleandthread (Hesperostipa comata), and green needlegrass (Nassella viridula). Little bluestem (Schizachyrium scoparium), sideoats grama (Bouteloua curtipendula), and prairie sandreed (Calamovilfa longifolia) are important species on steeper sites. Western snowberry (Symphoricarpos occidentalis) and prairie rose (Rosa arkansana) are commonly dispersed throughout the area. (USDA-NRCS 2006).

Classification relationships

Major Land Resource Area (MLRA): Southern Dark Brown Glaciated Plains (53C) (USDA-NRCS 2006)

USFS Subregions: Northeastern Glaciated Plains Section (331E); Missouri Coteau Subsection (331Ea); Western Great Plains Section (331F); Missouri Breaks Subsection (331Fe); Western Glaciated Plains Section (332B); Southern Missouri Coteau Slope Subsection (332Bd, 332Be); North Central Great Plains Section (332D); Southern Missouri Coteau Slope Subsection (332Dd); Southern Missouri Coteau Subsection (332De) - (Cleland et al. 2007).

US EPA Level IV Ecoregion: Missouri Coteau (42a); Southern Missouri Coteau (42e); Southern Missouri Coteau Slope (42f) - (USEPA 2013)

Ecological site concept

The Linear Meadow ecological site typically occurs in drainageways which can receive excessive run off moisture from within the watershed. Soils are formed in local alluvium and are poorly and very poorly drained, which have a water table within 0 to 2 feet of the soil surface that persists longer than the wettest part of the growing season typically until the month of August.

Vegetation in the Reference State is typically co-dominated by cool-season grass and grass-like species and warm season grasses including: prairie cordgrass, reedgrasses, and a variety of sedges and rushes. Forbs include broadfruit bur-reed, giant goldenrod, Maximilian sunflower, and asters. Non-native species such as reed canarygrass and creeping meadow foxtail may invade the site due to change in disturbance regime or presence of a seed source.

Associated sites

R053CY001SD	Shallow Marsh These sites occur in a basin or closed depression. Soils are very poorly drained and the site will pond water until early summer in most years. The central concept soil series is Worthing, but other series are included.
R053CY003SD	Subirrigated These sites occur in drainageways. Soils are somewhat poorly drained which have a water table within 2 to 5 feet of the soil surface that persists longer than the wettest part of the growing season typically until the month of August. The central concept soil series is Crossplain, but other series are included.
R053CY004SD	Wet Meadow These sites occur in a basin or closed depression. Soils are poorly drained and the site ponds water for 4 to 8 weeks in the spring of the year or after a heavy rain. The central concept soil series is Tetonka, but other series are included.
R053CY037SD	Deep Marsh These sites occur in a basin or closed depression. Soils are very poorly drained, and the site will pond water year-round in most years. The central concept soil series is Macken.

Similar sites

R053CY001SD	Shallow Marsh The Shallow Marsh site occurs in a basin or closed depression. Soils are very poorly drained and the site will pond water until early summer in most years. (less prairie cordgrass, whitetop dominant; higher production)

R053CY001SD

Shallow Marsh

The Shallow Marsh site occurs in a basin or closed depression. Soils are very poorly drained and the site will pond water until early summer in most years. (less prairie cordgrass, whitetop dominant; higher production)

Table 1. Dominant plant species

Tree	Not specified
Shrub	Not specified
Herbaceous	(1) Spartina pectinata (2) Calamagrostis stricta ssp. inexpansa

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Physiographic features

This site occurs on nearly level drainageways.

Figure 2. Distribution map

Table 2. Representative physiographic features

Landforms	(1) Flood plain (2) Pothole
Flooding duration	Brief (2 to 7 days) to long (7 to 30 days)
Flooding frequency	Occasional to frequent
Ponding frequency	None
Elevation	396 – 701 m
Slope	0 – 1%
Water table depth	0 – 61 cm
Aspect	Aspect is not a significant factor

Climatic features

MLRA 53C is considered to have a continental climate – cold winters and hot summers, low humidity, light rainfall, and much sunshine. Extremes in temperature may also abound. The climate is the result of this MLRA’s location near the geographic center of North America. There are few natural barriers on the Northern Great Plains and air masses move freely across the plains and account for rapid changes in temperature.

Annual precipitation typically ranges from 15 to 25 inches per year. The average annual temperature is about 45°F. January is the coldest month with average temperatures ranging from about 15°F (Stephan, South Dakota (SD)), to about 16°F (Onida 4 NW, SD). July is the warmest month with temperatures averaging from about 72°F (Stephan, SD), to about 74°F (Onida 4 NW, SD). The range of normal average monthly temperatures between the coldest and warmest months is about 58°F. This large annual range attests to the continental nature of this area's climate. Hourly winds are estimated to average about 12 miles per hour (mph) annually, ranging from about 13 mph during the spring to about 11 mph during the summer. Daytime winds are generally stronger than nighttime and occasional strong storms may bring brief periods of high winds with gusts to more than 50 mph.

Growth of cool-season plants begins in early to mid-March, slowing or ceasing in late June. Warm-season plants begin growth about mid-May and continue to early or mid-September. Greenup of cool-season plants may occur in September and October when adequate soil moisture is present.

Table 3. Representative climatic features

Frost-free period (average)	141 days
Freeze-free period (average)	160 days
Precipitation total (average)	635 mm

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Figure 3. Monthly precipitation range

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Figure 4. Monthly average minimum and maximum temperature

Influencing water features

The Linear Meadow ecological site has a combination of physical and hydrological features that: 1) provide season-long ground water within two feet of the surface, 2) allows relatively free movement of water and air in the upper part of the soil, and 3) are occasionally or frequently flooded.

Wetland description

Cowardin, et. al., 1979
System: Palustrine
Subsystem: N/A
Class: Persistent Emergent Wetland
Subclass: Semi-permanently, or Seasonally Flooded, or Saturated

Soil features

These are very deep, poorly to very poorly drained, fine textured soils. Salinity and sodicity are none to slight. Water tables on this site range from about 9 to 24 inches below the surface during most of the growing season. This site occurs mainly along flood plains and in potholes. Slope ranges from zero to one percent. This site should show no evidence of rills, wind scoured areas, or pedestalled plants. The soil surface is stable and intact. Subsurface soil layers are nonrestrictive to water movement and root penetration. These soils are not susceptible to water erosion. The high water table and slow permeability strongly influences the soil-water-plant relationship. The central concept soil series for this site include Clamo and Lawet, but others are included as well.

Access Web Soil Survey (http://websoilsurvey.nrcs.usda.gov/app/) for specific local soils information.

Table 4. Representative soil features

Surface texture	(1) Silt loam
Family particle size	(1) Loamy
Drainage class	Very poorly drained
Permeability class	Slow
Soil depth	203 cm
Surface fragment cover <=3"	0%
Surface fragment cover >3"	0%
Available water capacity (0-101.6cm)	17.78 cm
Calcium carbonate equivalent (0-101.6cm)	5 – 45%
Electrical conductivity (0-101.6cm)	0 – 4 mmhos/cm
Sodium adsorption ratio (0-101.6cm)	0 – 2
Soil reaction (1:1 water) (0-101.6cm)	7.4 – 8.4
Subsurface fragment volume <=3" (Depth not specified)	0%
Subsurface fragment volume >3" (Depth not specified)	0%

Ecological dynamics

State and Community Phases
The information in this Ecological Site Description, including the state-and-transition model (STM), was developed based on historical data, current field data, professional experience, and a review of the scientific literature. As a result, all possible scenarios or plant species may not be included. Key indicator plant species, disturbances, and ecological processes are described to inform land management decisions.

This site developed under Southern Dark Brown Glaciated Plains climatic conditions, light to severe grazing by bison and other large herbivores, sporadic natural or man-caused wildfire (often of light intensities), fluctuating water tables and flooding events, and other biotic and abiotic factors that typically influence soil/site development. Changes will occur in the plant communities due to short-term weather variations, impacts of native and/or exotic plant and animal species, and management actions. While the following plant community descriptions describe more typical transitions that will occur, severe disturbances, such as periods of well below average precipitation, can cause significant shifts in plant communities and/or species composition that may not be described within this document.

Heavy continuous grazing without adequate recovery periods following each grazing occurrence over several years causes this site to depart from the interpretive plant community. Species such as fowl bluegrass (Poa palustris), spikerush (Eleocharis), and rush (Juncus) will initially increase. Prairie cordgrass and northern reedgrass will decrease in frequency and production. Heavy continuous grazing causes reed canarygrass (Phalaris arundinacea) to increase and eventually dominate the site. Extended periods of nonuse and no fire will result in a plant community having high litter levels, which also favors an increase in reed canarygrass, spikerush, and fowl bluegrass.

Interpretations are primarily based on the 1.1 Prairie Cordgrass-Northern Reedgrass-Woolly Sedge Plant Community Phase. It has been determined by study of rangeland relic areas, areas protected from excessive disturbance, and areas under long-term rotational grazing regimes. Trends in plant community dynamics ranging from heavily grazed to lightly grazed areas, seasonal use pastures, and historical accounts also have been used. Plant community phases, states, transitional pathways, and thresholds have been determined through similar studies and experience.

The following is a diagram that illustrates the common plant community phases that can occur on the site and the transition and community pathways between them. The ecological processes will be discussed in more detail in the plant community descriptions following the diagram.

State and transition model

Custom diagram

Standard diagram

Figure 5. State-And-Transition model

Figure 6. Matrix

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Click on state and transition labels to scroll to the respective text

Ecosystem states

1. Reference State

2. Degraded State

3. Crop Production State

T1A	-	Heavy continuous grazing, Non use, No fire, Sedimentation
T1B	-	Tillage, Artificial drainage
T2A	-	Long term prescribed grazing
T2B	-	Tillage, Artificial drainage
T3A	-	Cropped and abandoned

State 1 submodel, plant communities

1.1. Prairie Cordgrass-Northern Reedgrass-Woolly Sedge

1.2. Woolly Sedge-Rush-Prairie Cordgrass-Reed Canarygrass

1.1A	-	Heavy continuous grazing
1.2A	-	Prescribed grazing

State 2 submodel, plant communities

2.1. Reed Canarygrass-Spikerush-Fowl Bluegrass

2.2. Annual Pioneer-Pioneer Perennial

2.1A	-	Heavy continuous grazing
2.2A	-	Time w/wo disturbances

State 3 submodel, plant communities

3.1. Annual Crops

State 1
Reference State

The Linear Meadow site typically occurs in drainageways. Soils are poorly and very poorly drained which have a water table within 0 to 2 feet of the soil surface that persists longer than the wettest part of the growing season typically until the month of August. The central concept soil series is Clamo and Lawet, but others are included. This state represents the natural range of variability that dominates the dynamics of this ecological site (ES). This state is typically codominated by cool-season grass and grass-like species, and warm-season grasses. Before European settlement, the primary disturbance mechanisms for this site in the reference condition included sporadic fire and grazing by large herding ungulates. Frequent surface fires (3 to 5 years) and grazing coupled with weather events dictated the dynamics that occurred within the natural range of variability. Today the primary disturbance is from a lack of fire and concentrated livestock grazing. Grasses that are desirable for livestock and wildlife can decline and a corresponding increase in less desirable grasses will occur.

Community 1.1
Prairie Cordgrass-Northern Reedgrass-Woolly Sedge

This community evolved with grazing by large herbivores, frequent surface fires and relatively frequent flooding and can be found on areas that are properly managed with grazing and/or prescribed burning, and sometimes on areas receiving occasional short periods of rest. The potential vegetation is about 65 percent grasses, 20 percent grass-like species, 10 percent forbs, and 5 percent shrubs by air-dry weight. Prairie cordgrass is the dominant tall warm-season grass occupying this plant community. Reedgrasses (Calamagrostis) are the dominant tall cool-season species. A variety of sedges (Cyperacease) and rushes (Juncaceae) occur throughout this community as well as fowl mannagrass (Glyceria striata), switchgrass (Panicum virgatum), reed canarygrass, plains bluegrass (Poa arida), and fowl bluegrass (Poa palustris). Key forbs include broadfruit bur-reed (Sparganium eurycarpum), giant goldenrod (Solidago gigantea), New England aster (Symphyotrichum novae-angliae), Maximilian sunflower (Helianthus maximiliani), white panicle aster (Symphyotrichum lanceolatum), and cinquefoil (Potentilla). This plant community phase is diverse, stable, and productive, and is well adapted to the Northern Great Plains. The high-water table supplies much of the moisture for plant growth. Community dynamics, nutrient cycle, water cycle, and energy flow are functioning properly. Plant litter is properly distributed with very little movement off-site and natural plant mortality is very low. The diversity in plant species allows for the variability of both the fluctuations of water table and reoccurring flooding. This is a sustainable plant community in terms of soil stability, watershed function, and biologic integrity.

Figure 7. Annual production by plant type (representative values) or group (midpoint values)

Table 5. Annual production by plant type

Plant type	Low (kg/hectare)	Representative value (kg/hectare)	High (kg/hectare)
Grass/Grasslike	5257	6019	6652
Forb	286	504	807
Shrub/Vine	62	202	387
Total	5605	6725	7846

Figure 8. Plant community growth curve (percent production by month). SD5309, Southern Dark Brown Glaciated Plains, warm-season dominant, cool-season subdominant.. Warm-season dominant, cool-season subdominant, lowland..

Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
J	F	M	A	M	J	J	A	S	O	N	D
0	0	3	10	16	22	23	14	7	5	0	0

Community 1.2
Woolly Sedge-Rush-Prairie Cordgrass-Reed Canarygrass

This plant community will slowly develop from the adverse effects of continuous grazing, without adequate recovery periods during the growing season following periods of below normal precipitation. Lack of litter and reduced plant heights result in higher soil temperatures and reduced water infiltration rates. Recognition of this plant community will enable the land user to implement key management decisions before a significant ecological threshold is crossed. When compared to the 1.1 Prairie Cordgrass-Northern Reedgrass-Woolly Sedge Plant Community Phase, prairie cordgrass has decreased. Sedge (Carex), rush, and other grass-like species are dominant. The grass-like species have increased while the reedgrass species have been significantly reduced. Switchgrass may be removed at this stage. Reed canarygrass may begin to increase significantly. Forb species would include asters (Aster), goldenrod (Solidago), and cinquefoil, as well as, a possible invasion of Canada thistle (Cirsium arvense). Plant production and frequency have been reduced. The water cycle, nutrient cycle, and energy flow are slightly reduced but continue to function adequately.

Figure 9. Annual production by plant type (representative values) or group (midpoint values)

Table 6. Annual production by plant type

Plant type	Low (kg/hectare)	Representative value (kg/hectare)	High (kg/hectare)
Grass/Grasslike	4192	4876	5397
Forb	241	560	1009
Shrub/Vine	50	168	319
Total	4483	5604	6725

Figure 10. Plant community growth curve (percent production by month). SD5307, Southern Dark Brown Glaciated Plains, cool-season dominant, warm-season subdominant.. Cool-season dominant, warm-season subdominant, lowland..

Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
J	F	M	A	M	J	J	A	S	O	N	D
0	0	5	13	20	25	18	11	5	3	0	0

Pathway 1.1A
Community 1.1 to 1.2

Heavy continuous grazing which includes herbivory at moderate to heavy levels at the same time of year each year without adequate recovery periods, or during periods of below normal precipitation when grazing frequency and intensity increases on these sites due to limited forage availability on adjacent upland sites will shift this community to the 1.2 Woolly Sedge-Rush-Prairie Cordgrass-Reed Canarygrass Plant Community Phase.

Pathway 1.2A
Community 1.2 to 1.1

Prescribed grazing (alternating season of use and providing adequate recovery periods) or periodic light to moderate grazing possibly including periodic rest will convert this plant community to the 1.1 Prairie Cordgrass-Northern Reedgrass-Woolly Sedge Plant Community Phase. This pathway could also occur with a return to more normal precipitation levels and frequencies.

Conservation practices

Prescribed Grazing

State 2
Degraded State

This state is characterized by the degradation of the biotic integrity of the site due to excessive disturbance resulting in dominance by highly competitive species such as reed canarygrass, and possibly the invasion of nonnative species. Loss of diversity and reduction of plant vigor and production have negatively impacted energy flow and nutrient cycling. Infiltration is reduced and native plant mortality is increased. As the disturbance level increases, native plant density decreases even more, giving way to annual species and invasive perennial species, as well as, an increase in bare ground.

Community 2.1
Reed Canarygrass-Spikerush-Fowl Bluegrass

This plant community phase develops either with increased sedimentation, heavy continuous grazing, or with a long-term lack of grazing and/or no surface fire. In each case, native plant vigor is reduced allowing the increase of competitive species and eventually the introduction of nonnative species. Spikerush and other grass-like species, as well as, bluegrasses will increase. The more competitive forbs will also increase. Reed canarygrass often will increase to the point of dominance while prairie cordgrass will diminish significantly. Other invasive plants such as creeping meadow foxtail (Alopecurus arundinaceus) or Canada thistle may become prevalent if a seed source is present or nearby. Nutrient cycling will be greatly diminished and the energy flow will shift significantly and be reduced as well. Infiltration will be reduced somewhat compared to the Reference State. This plant community is somewhat resistant to change. The combination of both grazing and fire is most effective in moving this plant community towards the Reference State.

Figure 11. Annual production by plant type (representative values) or group (midpoint values)

Table 7. Annual production by plant type

Plant type	Low (kg/hectare)	Representative value (kg/hectare)	High (kg/hectare)
Grass/Grasslike	3166	3968	4652
Forb	196	448	807
Shrub/Vine	–	67	146
Total	3362	4483	5605

Figure 12. Plant community growth curve (percent production by month). SD5306, Southern Dark Brown Glaciated Plains, lowland cool-season dominant.. Cool-season dominant, lowland..

Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
J	F	M	A	M	J	J	A	S	O	N	D
0	0	6	15	20	26	17	9	4	3	0	0

Community 2.2
Annual Pioneer-Pioneer Perennial

This plant community developed with heavy continuous grazing without adequate recovery periods between grazing events or abandonment after cropping. The dominant vegetation includes pioneer annual or perennial grasses, forbs, invaders, and early successional biennial and perennial species. Grasses may include inland saltgrass (Distichlis spicata), foxtail barley (Hordeum jubatum), barnyardgrass (Echinochloa crus-galli), quackgrass (Elymus repens), fowl bluegrass, Kentucky bluegrass (Poa pratensis), Baltic rush (Juncus balticus), and sedges. The dominant forbs may include cocklebur (Xanthium), Canada thistle, and other early successional species. The community is susceptible to invasion of nonnative species due to severe soil disturbances and relatively high percent of bare ground. This plant community is resistant to change as long as soil disturbance or severe vegetation defoliation persists, thus holding back secondary plant succession. Significant economic inputs, management, and time would be required to move this plant community toward a higher successional stage. Secondary succession is highly variable, depending upon availability and diversity of a viable reproductive source of higher successional species. This plant community may be renovated to improve the production capability, but management changes would be needed to maintain the new plant community.

Pathway 2.1A
Community 2.1 to 2.2

Heavy continuous grazing which includes herbivory at moderate to heavy levels at the same time of year each year without adequate recovery periods, or during periods of below normal precipitation when grazing frequency and intensity increases on these sites due to limited forage availability on adjacent upland sites will shift this community to the 2.2 Annual Pioneer-Perennial Pioneer Plant Community Phase.

Pathway 2.2A
Community 2.2 to 2.1

This community pathway occurs with the passage of time as successional processes take place and perennial plants gradually begin to establish on the site again. This pathway will lead to the 2.1 Reed Canarygrass-Spikerush-Fowl Bluegrass Plant Community Phase.

State 3
Crop Production State

Community 3.1
Annual Crops

This plant community developed with the use of a variety of tillage systems and cropping systems for the production of annual crops including corn, soybeans, wheat, and a variety of other crops.

Transition T1A
State 1 to 2

Sedimentation beyond normal levels due to increased flooding or non-use and no surface fire for extended periods of time (typically for 10 or more years) causing litter levels to become high enough to reduce native grass vigor, diversity, and density, or heavy continuous grazing will likely lead this state over a threshold resulting in the 2.1 Reed Canarygrass-Spikerush-Fowl Bluegrass Plant Community Phase within the Invaded State (State 2).

Transition T1B
State 1 to 3

Tillage, artificial drainage (surface and subsurface) will cause a shift over a threshold leading to the 3.1 Annual Crops Plant Community Phase within the Crop Production State (State 3).

Restoration pathway T2A
State 2 to 1

Long-term prescribed grazing (moderate stocking levels coupled with adequate recovery periods, or other grazing systems such as high-density, low-frequency intended to treat specific species dominance, or periodic light to moderate stocking levels possibly including periodic rest) may lead this plant community phase over a threshold to the Reference State (State 1). Wetland restoration techniques may be necessary to restore biotic integrity and plant diversity and productivity.

Conservation practices

Prescribed Grazing
Wetland Restoration

Transition T2B
State 2 to 3

Tillage, artificial drainage (surface and subsurface) will cause a shift over a threshold leading to the 3.1 Annual Crops Plant Community Phase within the Crop Production State (State 3).

Restoration pathway T3A
State 3 to 2

Cropping followed by abandonment may lead this plant community phase over a threshold to the Invaded State (State 2) and more specifically to the 2.2 Annual Pioneer-Perennial Pioneer Plant Community Phase.

Additional community tables

Table 8. Community 1.1 plant community composition

Group	Common name	Symbol	Scientific name	Annual production (kg/hectare)	Foliar cover (%)
Grass/Grasslike
1	Tall Warm-Season Grasses			1345–3363
	prairie cordgrass	SPPE	Spartina pectinata	1345–3026	–
	spiked muhly	MUGL3	Muhlenbergia glomerata	0–336	–
	switchgrass	PAVI2	Panicum virgatum	0–336	–
2	Cool-Season Grasses			673–1681
	northern reedgrass	CASTI3	Calamagrostis stricta ssp. inexpansa	269–807	–
	bluejoint	CACA4	Calamagrostis canadensis	202–673	–
	slimstem reedgrass	CASTS5	Calamagrostis stricta ssp. stricta	67–538	–
	fowl mannagrass	GLST	Glyceria striata	67–336	–
	reed canarygrass	PHAR3	Phalaris arundinacea	67–336	–
	slender wheatgrass	ELTR7	Elymus trachycaulus	0–202	–
3	Grass-likes			673–1345
	woolly sedge	CAPE42	Carex pellita	135–673	–
	fox sedge	CAVU2	Carex vulpinoidea	135–673	–
	bottlebrush sedge	CAHY4	Carex hystericina	67–336	–
	smoothcone sedge	CALA12	Carex laeviconica	67–336	–
	rush	JUNCU	Juncus	67–336	–
	bulrush	SCHOE6	Schoenoplectus	0–202	–
	yellow nutsedge	CYES	Cyperus esculentus	0–202	–
	spikerush	ELEOC	Eleocharis	67–202	–
	Grass-like (not a true grass)	2GL	Grass-like (not a true grass)	0–202	–
4	Other Native Grasses			67–673
	Graminoid (grass or grass-like)	2GRAM	Graminoid (grass or grass-like)	0–336	–
	Canada wildrye	ELCA4	Elymus canadensis	67–336	–
	plains bluegrass	POAR3	Poa arida	0–202	–
	fowl bluegrass	POPA2	Poa palustris	0–202	–
Forb
5	Forbs			336–673
	Forb, native	2FN	Forb, native	67–269	–
	giant goldenrod	SOGI	Solidago gigantea	67–202	–
	broadfruit bur-reed	SPEU	Sparganium eurycarpum	0–202	–
	New England aster	SYNO2	Symphyotrichum novae-angliae	0–202	–
	broadleaf cattail	TYLA	Typha latifolia	0–135	–
	prairie ironweed	VEFA2	Vernonia fasciculata	67–135	–
	meadow zizia	ZIAP	Zizia aptera	67–135	–
	white panicle aster	SYLA6	Symphyotrichum lanceolatum	67–135	–
	marsh skullcap	SCGA	Scutellaria galericulata	67–135	–
	Canadian anemone	ANCA8	Anemone canadensis	67–135	–
	nodding beggartick	BICE	Bidens cernua	67–135	–
	spotted water hemlock	CIMA2	Cicuta maculata	0–135	–
	wild mint	MEAR4	Mentha arvensis	67–135	–
	water knotweed	POAM8	Polygonum amphibium	0–135	–
	Pennsylvania smartweed	POPE2	Polygonum pensylvanicum	0–135	–
	American licorice	GLLE3	Glycyrrhiza lepidota	67–135	–
	Maximilian sunflower	HEMA2	Helianthus maximiliani	67–135	–
	Macoun's buttercup	RAMA2	Ranunculus macounii	0–135	–
	western dock	RUAQ	Rumex aquaticus	0–67	–
	rough bugleweed	LYAS	Lycopus asper	0–67	–
	brook cinquefoil	PORI3	Potentilla rivalis	0–67	–
	common boneset	EUPE3	Eupatorium perfoliatum	0–67	–
	Virginia strawberry	FRVI	Fragaria virginiana	0–67	–
	silverweed cinquefoil	ARAN7	Argentina anserina	0–67	–
	northern water plantain	ALTR7	Alisma triviale	0–67	–
	marsh fleabane	SECO2	Senecio congestus	0–67	–
	hemlock waterparsnip	SISU2	Sium suave	0–67	–
Shrub/Vine
6	Shrubs			67–336
	Shrub (>.5m)	2SHRUB	Shrub (>.5m)	0–202	–
	false indigo bush	AMFR	Amorpha fruticosa	67–202	–
	Missouri River willow	SAER	Salix eriocephala	0–202	–
	sandbar willow	SAIN3	Salix interior	0–202	–
	meadow willow	SAPE5	Salix petiolaris	0–202	–

Table 9. Community 1.2 plant community composition

Group	Common name	Symbol	Scientific name	Annual production (kg/hectare)	Foliar cover (%)
Grass/Grasslike
1	Tall Warm-Season Grasses			280–1401
	prairie cordgrass	SPPE	Spartina pectinata	280–1401	–
	switchgrass	PAVI2	Panicum virgatum	0–112	–
2	Cool-Season Grasses			280–841
	reed canarygrass	PHAR3	Phalaris arundinacea	11–673	–
	fowl mannagrass	GLST	Glyceria striata	0–560	–
	northern reedgrass	CASTI3	Calamagrostis stricta ssp. inexpansa	0–280	–
	bluejoint	CACA4	Calamagrostis canadensis	0–224	–
	slimstem reedgrass	CASTS5	Calamagrostis stricta ssp. stricta	0–168	–
3	Grass-likes			841–2522
	woolly sedge	CAPE42	Carex pellita	56–841	–
	fox sedge	CAVU2	Carex vulpinoidea	56–841	–
	rush	JUNCU	Juncus	112–841	–
	bottlebrush sedge	CAHY4	Carex hystericina	56–560	–
	smoothcone sedge	CALA12	Carex laeviconica	56–560	–
	spikerush	ELEOC	Eleocharis	112–448	–
	bulrush	SCHOE6	Schoenoplectus	0–224	–
	Grass-like (not a true grass)	2GL	Grass-like (not a true grass)	0–168	–
	yellow nutsedge	CYES	Cyperus esculentus	0–56	–
4	Other Native Grasses			224–673
	plains bluegrass	POAR3	Poa arida	56–448	–
	fowl bluegrass	POPA2	Poa palustris	56–448	–
	Graminoid (grass or grass-like)	2GRAM	Graminoid (grass or grass-like)	0–280	–
	Canada wildrye	ELCA4	Elymus canadensis	0–112	–
Forb
5	Forbs			280–841
	giant goldenrod	SOGI	Solidago gigantea	56–336	–
	broadfruit bur-reed	SPEU	Sparganium eurycarpum	0–280	–
	New England aster	SYNO2	Symphyotrichum novae-angliae	56–280	–
	broadleaf cattail	TYLA	Typha latifolia	0–224	–
	Forb, introduced	2FI	Forb, introduced	56–224	–
	Forb, native	2FN	Forb, native	0–168	–
	white panicle aster	SYLA6	Symphyotrichum lanceolatum	56–168	–
	American licorice	GLLE3	Glycyrrhiza lepidota	56–168	–
	water knotweed	POAM8	Polygonum amphibium	0–112	–
	spotted water hemlock	CIMA2	Cicuta maculata	0–112	–
	brook cinquefoil	PORI3	Potentilla rivalis	0–56	–
	Macoun's buttercup	RAMA2	Ranunculus macounii	0–56	–
	marsh skullcap	SCGA	Scutellaria galericulata	0–56	–
	Canadian anemone	ANCA8	Anemone canadensis	0–56	–
	silverweed cinquefoil	ARAN7	Argentina anserina	0–56	–
	nodding beggartick	BICE	Bidens cernua	0–56	–
	Maximilian sunflower	HEMA2	Helianthus maximiliani	0–56	–
	wild mint	MEAR4	Mentha arvensis	0–56	–
	prairie ironweed	VEFA2	Vernonia fasciculata	0–56	–
	meadow zizia	ZIAP	Zizia aptera	0–56	–
Shrub/Vine
6	Shrubs			56–280
	false indigo bush	AMFR	Amorpha fruticosa	56–280	–
	Shrub (>.5m)	2SHRUB	Shrub (>.5m)	0–112	–
	Missouri River willow	SAER	Salix eriocephala	0–56	–
	sandbar willow	SAIN3	Salix interior	0–56	–
	meadow willow	SAPE5	Salix petiolaris	0–56	–

Table 10. Community 2.1 plant community composition

Group	Common name	Symbol	Scientific name	Annual production (kg/hectare)	Foliar cover (%)
Grass/Grasslike
1	Tall Warm-Season Grasses			0–224
	prairie cordgrass	SPPE	Spartina pectinata	0–224	–
2	Cool-Season Grasses			673–1569
	fowl mannagrass	GLST	Glyceria striata	673–2690	–
	reed canarygrass	PHAR3	Phalaris arundinacea	673–1569	–
3	Grass-likes			673–2018
	spikerush	ELEOC	Eleocharis	448–1121	–
	rush	JUNCU	Juncus	224–897	–
	yellow nutsedge	CYES	Cyperus esculentus	0–448	–
	bottlebrush sedge	CAHY4	Carex hystericina	0–224	–
	woolly sedge	CAPE42	Carex pellita	0–224	–
	fox sedge	CAVU2	Carex vulpinoidea	0–224	–
	smoothcone sedge	CALA12	Carex laeviconica	0–135	–
	bulrush	SCHOE6	Schoenoplectus	0–90	–
	Grass-like (not a true grass)	2GL	Grass-like (not a true grass)	0–45	–
4	Other Native Grasses			224–673
	plains bluegrass	POAR3	Poa arida	90–448	–
	fowl bluegrass	POPA2	Poa palustris	90–448	–
	Graminoid (grass or grass-like)	2GRAM	Graminoid (grass or grass-like)	0–224	–
Forb
5	Forbs			224–673
	giant goldenrod	SOGI	Solidago gigantea	45–359	–
	Forb, introduced	2FI	Forb, introduced	45–314	–
	New England aster	SYNO2	Symphyotrichum novae-angliae	45–269	–
	broadleaf cattail	TYLA	Typha latifolia	45–269	–
	white panicle aster	SYLA6	Symphyotrichum lanceolatum	45–179	–
	Forb, native	2FN	Forb, native	0–90	–
	American licorice	GLLE3	Glycyrrhiza lepidota	0–90	–
	water knotweed	POAM8	Polygonum amphibium	0–45	–
	spotted water hemlock	CIMA2	Cicuta maculata	0–45	–
	broadfruit bur-reed	SPEU	Sparganium eurycarpum	0–45	–
Shrub/Vine
6	Shrubs			0–135
	false indigo bush	AMFR	Amorpha fruticosa	0–135	–
	Shrub (>.5m)	2SHRUB	Shrub (>.5m)	0–45	–

Interpretations

Animal community

Animal Community – Grazing Interpretations
The following table lists annual, suggested initial stocking rates with average growing conditions. These are conservative estimates that should be used only as guidelines in the initial stages of conservation planning. Often, the current plant composition does not entirely match any particular plant community (as described in this ES description). Because of this, a resource inventory is necessary to document plant composition and production. More accurate carrying capacity estimates should eventually be calculated using the following stocking rate information along with animal preference data and actual stocking records, particularly when grazers other than cattle are involved. With consultation of the land manager, more intensive grazing management may result in improved harvest efficiencies and increased carrying capacity.

Prairie Cordgrass/Reedgrass/Sedge (1.1)
Average Annual Production (lbs./acre, air-dry): 6,000
Stocking Rate* (AUM/acre): 1.65

Sedge/Rush/Prairie Cordgrass/Reed Canarygrass (1.2)
Average Annual Production (lbs./acre, air-dry): 5,000
Stocking Rate* (AUM/acre): 1.37

Reed Canarygrass/Spikerush/Bluegrass (2.1)
Average Annual Production (lbs./acre, air-dry): 4,000
Stocking Rate* (AUM/acre): 1.09

Annual/Pioneer Perennial (2.2)
Average Annual Production (lbs./acre, air-dry): 2,000
Stocking Rate* (AUM/acre): 0.55

*Based on 912 lbs./acre (air-dry weight) per Animal Unit Month (AUM), and on 25 percent harvest efficiency (refer to United States Department of Agriculture (USDA) Natural Resources Conservation Service (NRCS) National Range and Pasture Handbook).

Grazing by domestic livestock is one of the major income-producing industries in the area. Rangeland in this area may provide yearlong forage. During the dormant period, the forage for livestock will likely be lacking protein to meet livestock requirements, and added protein will allow ruminants to better utilize the energy stored in grazed plant materials. A forage quality test (either directly or through fecal sampling) should be used to determine the level of supplementation needed.

Hydrological functions

Water is the principal factor limiting forage production on this site. This site is dominated by soils in Hydrologic Group C. Infiltration is very slow and runoff potential for this site is negligible. In many cases, areas with greater than 75 percent ground cover have the greatest potential for high infiltration and lower runoff. Areas where ground cover is less than 50 percent have the greatest potential to have reduced infiltration and higher runoff (refer to Section 4, NRCS National Engineering Handbook for runoff quantities and hydrologic curves).

Recreational uses

This site provides hunting, hiking, photography, bird watching, and other opportunities. The wide varieties of plants that bloom from spring until fall have an esthetic value that appeals to visitors.

Wood products

No appreciable wood products are typically present on this site.

Other products

Seed harvest of native plant species can provide additional income on this site.

Other information

Ecological Site Correlation Issues and Questions:

• SD059 Hand County, SD did not use the (Lc) Lawet loam (national symbol cw5j) as used in the adjoining SD069 Hyde County, SD.
• Reference and alternative states within the state and transition model are may not be fully documented and may require additional field sampling for refinement.

Supporting information

Inventory data references

Information presented here has been derived from NRCS clipping data and other inventory data. Field observations from range-trained personnel were also used. Those involved in developing this site include: Stan Boltz, Range Management Specialist, NRCS; and Bruce Kunze, Soil Scientist, NRCS.

Data Source Sample Period State County
None

Other references

Cleland, D.T., J.A. Freeouf, J.E. Keys, G.J. Nowacki, C. Carpenter, and W.H. McNab. 2007. Ecological Subregions: Sections and Subsections of the Coterminous United States. USDA Forest Service, General Technical Report WO-76. Washington, DC. 92 pps.

Samson, F. B., & Knopf, F. L. (1996). Prairie Conservation Preserving North America's Most Endagered Ecosystem. Washington D.C.: Island Press.

Soil Survey Staff, Natural Resources Conservation Service, United States Department of Agriculture. Official Soil Series Descriptions. Available online. Accessed March 2019.
United States Department of Agriculture – Natural Resource Conservation Service (USDA-NRCS). 2003. National Range and Pasture Handbook, Revision 1. Grazing Lands Technology Institute. 214 pps.

United States Department of Agriculture – Natural Resource Conservation Service (USDA-NRCS). 2006. Land Resource Regions and Major Land Resource Areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. 672pps.

USDA, NRCS. National Soil Information System, Information Technology Center, 2150 Centre Avenue, Building A, Fort Collins, CO 80526. (http://soils.usda.gov/technical/nasis/)

USDA, NRCS. 2019. The PLANTS Database (http://plants.usda.gov, 13 March 2019). National Plant Data Team, Greensboro, NC 27401-4901 USA.

U.S. Environmental Protection Agency [EPA]. 2013. Level III and Level IV Ecoregions of the Continental United States. Corvallis, OR, U.S. EPA, National Health and Environmental Effects Research Laboratory, map scale 1:3,000,000. Available at http://www.epa.gov/eco-research/level-iii-and-iv-ecoregions- continental-united-states. (Accessed 13 March 2019).

Contributors

Stan Boltz

Approval

Suzanne Mayne-Kinney, 11/15/2024

Acknowledgments

Contact for Lead Authors: Natural Resources Conservation Service (USDA-NRCS), Redfield Soil Survey Office Redfield, SD; Lance Howe (Lance.Howe@usda.gov), Soil Survey Office Leader, USDA-NRCS, Redfield, SD; and Steve Winter (Steven.Winter@usda.gov), Soil Scientist, USDA-NRCS, Redfield, SD

Additional Information Acknowledgment: Jason Hermann (Jason.Hermann@usda.gov), Area Rangeland Management Specialist, USDA-NRCS, Redfield, SD.

This Provisional Ecological Site concept has passed both Quality Control and Quality Assurance processes. Quality Assurance was approved by David Kraft, NRCS Regional Ecologist as of 11/12/2020.

Non-discrimination Statement
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Persons with disabilities who require alternative means of communication for program information (e.g., Braille, large print, audiotape, American Sign Language, etc.) should contact the responsible Agency or USDA's TARGET Center at (202) 720-2600 (voice and TTY) or contact USDA through the Federal Relay Service at (800) 877-8339. Additionally, program information may be made available in languages other than English.

To file a program discrimination complaint, complete the USDA Program Discrimination Complaint Form, AD-3027, available online and at any USDA office, or write a letter addressed to USDA and provide in the letter all of the information requested in the form. To request a copy of the complaint form, call (866) 632- 9992. Submit your completed form or letter to USDA by: (1) mail: U.S. Department of Agriculture, Office of the Assistant Secretary for Civil Rights, 1400 Independence Avenue, SW, Washington, D.C. 20250-9410; (2) fax: (202) 690-7442; or (3) email: program.intake@usda.gov.

Rangeland health reference sheet

Interpreting Indicators of Rangeland Health is a qualitative assessment protocol used to determine ecosystem condition based on benchmark characteristics described in the Reference Sheet. A suite of 17 (or more) indicators are typically considered in an assessment. The ecological site(s) representative of an assessment location must be known prior to applying the protocol and must be verified based on soils and climate. Current plant community cannot be used to identify the ecological site.

Author(s)/participant(s)	Stan Boltz, Mitch Faulkner, Shane Deranleau
Contact for lead author	Stan Boltz, stanley.boltz@sd.usda.gov, 605-352-1236
Date	03/15/2011
Approved by	Suzanne Mayne-Kinney
Approval date
Composition (Indicators 10 and 12) based on	Annual Production

Indicators

Number and extent of rills:
Rills should not be present.
Presence of water flow patterns:
Barely observable or not present.
Number and height of erosional pedestals or terracettes:
Essentially non-existent.
Bare ground from Ecological Site Description or other studies (rock, litter, lichen, moss, plant canopy are not bare ground):
Bare ground less than 5 percent and pathces less than two inches in diameter.
Number of gullies and erosion associated with gullies:
Active gullies should not be present.
Extent of wind scoured, blowouts and/or depositional areas:
None present.
Amount of litter movement (describe size and distance expected to travel):
Little to no plant litter movement. Plant litter remains in place and is not moved by erosional forces.
Soil surface (top few mm) resistance to erosion (stability values are averages - most sites will show a range of values):
Soil aggregate stability normally a 6 rating. Typically high root content and organic matter in the soil surface. Soil surface is very resistant to erosion.
Soil surface structure and SOM content (include type of structure and A-horizon color and thickness):
Structure is granular to friable fine, subangular blocky, and mollic (higher organic matter) colors of A-horizon down to about 10 inches.
Effect of community phase composition (relative proportion of different functional groups) and spatial distribution on infiltration and runoff:
Healthy, deep-rooted native grass and grass-like species enhance infiltration and reduce runoff.
Presence and thickness of compaction layer (usually none; describe soil profile features which may be mistaken for compaction on this site):
No compaction layer should be present.
Functional/Structural Groups (list in order of descending dominance by above-ground annual-production or live foliar cover using symbols: >>, >, = to indicate much greater than, greater than, and equal to):

Dominant:
Tall, warm-season grasses >

Sub-dominant:
Cool-season grasses (mid and tall) > grass-like species > forbs >

Other:
Shrubs

Additional:
Other native grasses occur in other functional groups.
Amount of plant mortality and decadence (include which functional groups are expected to show mortality or decadence):
Very little to no evidence of decadence or mortality.
Average percent litter cover (%) and depth ( in):
85-90 percent plant litter cover, roughly 1 to 2 1/2 inches in depth. Litter cover is in contact with the soil surface.
Expected annual annual-production (this is TOTAL above-ground annual-production, not just forage annual-production):
6,000 pounds/acre (air-dry basis)
Potential invasive (including noxious) species (native and non-native). List species which BOTH characterize degraded states and have the potential to become a dominant or co-dominant species on the ecological site if their future establishment and growth is not actively controlled by management interventions. Species that become dominant for only one to several years (e.g., short-term response to drought or wildfire) are not invasive plants. Note that unlike other indicators, we are describing what is NOT expected in the reference state for the ecological site:
Refer to State and local Noxious Weed List; also reed canarygrass.
Perennial plant reproductive capability:
Perennial grass and grass-like species have vigorous rhizomes and/or tillers.

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Ecosystem states

1. Reference State

2. Degraded State

3. Crop Production State

T1A	-	Heavy continuous grazing, Non use, No fire, Sedimentation
T1B	-	Tillage, Artificial drainage
T2A	-	Long term prescribed grazing
T2B	-	Tillage, Artificial drainage
T3A	-	Cropped and abandoned