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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.
MLRA notes
Major Land Resource Area (MLRA): 055D–Glacial Lake Dakota
MLRA 55D is in South Dakota (92 percent) and southeastern North Dakota (8 percent). It makes up about 3,059 square miles (7,923 square kilometers). This area, which is part of the glacial till plain region, consists of a large, glacial lake plain that was drained by the James River, which flows southward through the area. The MLRA is dominantly farmland converted from prairie, but some areas of grassland remain. Agricultural drainage practices have impacted shallow depressions in many areas.
MLRA 55D has distinct boundaries. Till plains are on all sides. MLRA 55B borders the area largely to the north and is also between the Lake Dakota Plain and two prominent coteaus—the Missouri Coteau on the west and the Prairie Coteau on the east. To the south is MLRA 55C (Southern Black Glaciated Plains), which has a mesic soil temperature regime.
This area is in the Central Lowland province of the Interior Plains. Elevation ranges from 1,250 to 1,330 feet (380 to 405 meters), generally increasing from south to north. The area is characterized by mostly level to moderately sloping lake plains with many depressions and drainages. Much of the area has integrated drainage; drainage channels are poorly to moderately defined.
The glaciolacustrine sediments of the Lake Dakota Plain range from sandy to clayey and are commonly stratified. Some areas of the lake plain are mantled with wind-deposited materials, which are moderately coarse textured or sandy. Alluvial deposits and low terraces are common along the James River and its major tributaries but also occur in narrow and discontinuous strips along other streams.Classification relationships
Major Land Resource Area (MLRA): Southern Black Glaciated Plains (55D) (USDA-NRCS, 2022)
USFS Sub-region: Located mainly within unit 332Bc and 332Ba (Cleland et al., 2007).Ecological site concept
The Shallow Marsh ecological site is most commonly located in deep depressions on till plains, lake plains, outwash plains, and eolian sand plains; but it also occurs in drainageways and depressional areas of flood plains. The soil is very deep. The dark-colored surface soil is more than 7 inches thick and generally more than 20 inches thick; however, some soils with thin topsoil layers (<7 inches) are included. The site is very poorly drained; under normal climatic conditions, it is ponded for very long periods during the growing season. Typically, the depth of ponding is less than 3 feet in the spring and less than 1.5 feet in late summer. Soil salinity (E.C. <16) is allowable on this site. Effervescence ranges from none to strong. Hydrology (surface and sub-surface) is the primary factor used in identifying this site. All textures are included in the site. Slope is less than 1 percent. On the landscape, this site is below the Clayey, Loamy, Loamy Overflow, Limy Subirrigated, Subirrigated, Subirrigated Sands, and Wet Meadow ecological sites. The Saline Lowland site is slightly higher on rims of depressions and adjacent flats; it has moderate to very strong soil salinity.
Associated sites
R055DY020SD Loamy Overflow
This site occurs in upland swales and on floodplains. The surface and subsoil layers form a ribbon 1 to 2 inches long. It is >30 inches to redoximorphic features.
R055DY010SD Loamy
This site occurs on higher, linear slopes on nearby uplands. The surface layer and subsoil layers form a ribbon 1 to 2 inches long. It is >30 inches to redoximorphic features.
R055DY044SD Subirrigated Sands
This site occurs on nearby uplands of sandy plains. The upper 20 inches does not form a ribbon. Redoximorphic features occur between 30 and 40 inches.
R055DY011SD Clayey
This site occurs on nearby uplands. The subsoil layers form a ribbon >2 inches long. It is >30 inches to redoximorphic features.
R055DY004SD Wet Meadow
This site is in shallow depressions and on low-lying flats. It is poorly drained - a seasonal high water table is typically within a depth of 1.5 feet during the months of April through June; in depressions, it is frequently ponded (typically <1.5) in April and May. It typically has redoximorphic features within a depth of 18 inches. Some soils are highly calcareous. It is non-saline to slightly saline (E.C. <8) in the surface and subsoil layers. All textures are included in this site.
R055DY006SD Limy Subirrigated
This site occurs on flats adjacent to Shallow Marsh sites. All textures are included in this site. They are highly calcareous in the upper part of the subsoil and have redoximorphic features at a depth of 18 to 30 inches.
R055DY007SD Saline Lowland
This site is poorly drained or somewhat poorly drained and occurs on rims of depressions and adjacent flats. It has an accumulation of salts in the surface and subsoil layer (E.C. >8). Typically, this site does not have a claypan layer, but one is allowed if the soil is poorly drained. All textures are included in this site.
R055DY003SD Subirrigated
This site is somewhat poorly drained and occurs on flats adjacent to Shallow Marsh sites. The soils are non-effervescent to a depth >16 inches; redoximorphic features at a depth of 18 to 30 inches. All textures are included in the site.
Similar sites
R055DY004SD Wet Meadow
This site is in shallow depressions and on low-lying flats. It is poorly drained - a seasonal high water table is typically within a depth of 1.5 feet during the months of April through June; in depressions, it is frequently ponded (typically <1.5) in April and May. It typically has redoximorphic features within a depth of 18 inches. Some soils are highly calcareous. It is non-saline to slightly saline (E.C. <8) in the surface and subsoil layers. All textures are included in this site.
Table 1. Dominant plant species
Tree Not specified
Shrub Not specified
Herbaceous (1) Carex atherodes
(2) Glyceria grandis var. grandisPhysiographic features
This site typically occurs in deep depressions on uplands – till plains, lake plains, outwash plains, and eolian sand plains; however, it also occurs in drainageways and on depressional areas of flood plains. Parent materials are alluvium, glaciolacustrine sediments, glaciofluvial deposits, or eolian sands. Slope is less than 1 percent.
Table 2. Representative physiographic features
Landforms (1) Lake plain > Depression
(2) Lake plain > Drainageway
Runoff class Very low Flooding duration Very long (more than 30 days) Flooding frequency None to frequent Ponding duration Long (7 to 30 days) to very long (more than 30 days) Ponding frequency None to frequent Elevation 980 – 2130 ft Slope 0 – 1 % Ponding depth 5 – 21 in Water table depth 0 – 12 in Aspect Aspect is not a significant factor Climatic features
The average annual precipitation of MLRA 55D is 22 to 23 inches (549 to 594 millimeters). About 75 percent of the rainfall comes from high-intensity, convective thunderstorms during the growing season. Winter precipitation is typically snow. The average annual snowfall is 25 to 50 inches (635 to 1,270 millimeters). Strong winds commonly deposit the snow unevenly across the landscape. The average annual temperature is 43 to 45 degrees F (6 to 7 degrees C). The freeze-free period averages about 135 days and ranges from 120 to 150 days.
Table 3 Representative climatic features
Frost-free period (characteristic range) 110-120 days Freeze-free period (characteristic range) 130-130 days Precipitation total (characteristic range) 20-20 in Frost-free period (actual range) 110-120 days Freeze-free period (actual range) 130-130 days Precipitation total (actual range) 20-20 in Frost-free period (average) 120 days Freeze-free period (average) 130 days Precipitation total (average) 20 in Characteristic rangeActual rangeBarLineFigure 1. Monthly precipitation range
Characteristic rangeActual rangeBarLineFigure 2. Monthly minimum temperature range
Characteristic rangeActual rangeBarLineFigure 3. Monthly maximum temperature range
BarLineFigure 4. Monthly average minimum and maximum temperature
Figure 5. Annual precipitation pattern
Figure 6 Annual average temperature pattern
Climate stations used
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(1) BRITTON [USC00391049], Britton, SD
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(2) ANDOVER #2 [USC00390120], Andover, SD
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(3) TURTON [USC00398420], Turton, SD
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(4) CONDE [USC00391917], Conde, SD
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(5) REDFIELD [USC00397052], Redfield, SD
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(6) MELLETTE 4 W [USC00395456], Northville, SD
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(7) ABERDEEN [USW00014929], Aberdeen, SD
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(8) COLUMBIA 8 N [USC00391873], Columbia, SD
">Influencing water features
This site is very poorly drained. Under average climatic conditions, it is inundated for very long periods (>30 days) during the growing season. Some soils in this site have endosaturation (apparent water table) and others have episaturation (perched water table above a subsoil layer with low or moderately low saturated hydraulic conductivity). Water tables in endosaturated soils typically range from 1.5 feet above to 6 inches below the surface during most of the growing season. The depth of ponding on episaturated soils, typically, is less than 3 feet in the spring and less than 1.5 feet in late summer. Surface water may not be evident in late summer; but saturation is generally within a depth of 18 inches during this time. <br />
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Water on the site is typically received from upland runoff, but on flood plains it is from stream overflow. Soils occurring on flood plains have frequent, long or very long flooding. Surface infiltration ranges from very slow to very rapid. Saturated hydraulic conductivity ranges from low to very high. These typically are flow-through wetlands but can also be recharge wetlands. See Site Development and Testing plan for discussion of discharge wetlands. <br />
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Wetlands receive water from different sources including ground water movement. Recharge wetlands have groundwater flow predominantly away from the wetland moving toward or into a flow-through or discharge wetland basin. Flow-through wetlands have groundwater flowing away from the wetland basin but is balanced with water flowing into the basin. <br />
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Water loss is primarily through evapotranspiration and lateral movement into (and evaporation from) adjacent soils. During periods of drought or extreme wetness, water table fluctuations will also have an impact on depth of ponding, especially in sandy soils. During periods of drawdown (e.g. prolonged drought), soil and water chemistry may significantly impact the soil/water/vegetation dynamics of the site (see Site Development and Testing Plan).<br />
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Fluctuations in specific conductance are less pronounced during average or normal water conditions than during periods of excessive water depth or extreme drought. The approximate normal and extreme range in specific conductance (micromhos/cm3) of surface water in plant communities that are indicators of differences in average salinity are as follows:<br />
<br />
Plant Community Normal Range (micromhos/cm3 Electroconductivity (dS/m)<br />
Fresh <40 - 500 0.5<br />
Slightly brackish 500 - 2,000 0.5 to 2.0<br />
Moderately brackish 2,000 - 5,000 2.1 to 5.0<br />
Brackish 5,000 - 15,000 5.1 to 15.0<br />
Sub-saline 15,000 - 45,000 15.1 to 45.0<br />
Saline 45,000 -100,000 > 45.0<br />
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Soils in these depressions are considered seasonal wetlands; however, during wetter than average climate cycles, these soils may have continuous, deep ponding throughout the growing season (or through multiple growing seasons).Wetland description
Wetland Description: Cowardin, et al., 1979 <br />
System: Palustrine <br />
Subsystem: N/A<br />
Class: Persistent Emergent Wetland<br />
Sub-class: Seasonally FloodedSoil features
Soils associated are in the Mollisol and Vertisol orders; however, a few Histosols are also included. The Mollisols are classified further as Vertic Argiaquolls, Cumulic Vertic Epiaquolls, Typic Endoaquolls, Cumulic Endoaquolls, Typic Calciaquolls, and Histic Endoaquolls. The Vertisols are classified further as Typic Endoaquerts, Typic Epiaquerts, and Typic Calciaquerts. The Histosols are further classified as Terric Haplosaprists and Typic Haplosaprists. These soils were developed under wetland vegetation associated with very long periods of inundation. They formed in glaciolacustrine sediments, glaciofluvial deposits, eolian deposits, local alluvium from till, or flood plain alluvium. A few inches of organic materials are common on the surface of mineral soils that have never been cultivated. Histosols (soils with organic materials ranging from 8 inches to more than 3 feet thick) are not extensive.
The common feature of soils in this site is frequent seasonal inundation (typically extends into mid-summer or longer). Some are in deep depressions and potholes that are ponded through most of the growing season and some are on flood plains with frequent, long or very long flooding. The soils are very deep and very poorly drained. Since hydrology (surface and sub-surface) is the primary factor used in identifying this site, all textures are included. Therefore, soil physical properties associated with texture vary widely. The dark-colored surface soil is more than 7 inches thick and generally more than 20 inches thick; however, soils with thin topsoil layers (<7 inches thick) also occur.
This site should show no evidence of rills, wind-scoured areas, or pedestaled plants. The soil surface is stable and intact. Sub-surface soil layers are non-restrictive to root penetration, but in some soils water movement downward is slowed. These soils are not susceptible to water erosion. Ponded water conditions strongly influence the soil/water/plant relationship.
Major soil series correlated to the Shallow Marsh site are: Parnell, Rauville, Oldham, and Venlo. Frequently ponded phases of the Colvin, Fossum, and Lowe are also included in the site.Table 4. Representative soil features
Parent material (1) Alluvium
(2) Glaciofluvial deposits
(3) Glaciolacustrine deposits
Surface texture (1) Silty clay loam
(2) Silt loam
(3) Loam
(4) Silty clay
(5) Fine sandy loam
Drainage class Very poorly drained Permeability class Very slow to very rapid Depth to restrictive layer 80 – 0 in Soil depth 80 – 0 in Surface fragment cover <=3" Not specified Surface fragment cover >3" Not specified Available water capacity
(0-60in)5 – 7.6 in Calcium carbonate equivalent
(0-40in)3 – 21 % Electrical conductivity
(0-40in)Not specified Sodium adsorption ratio
(0-40in)0 – 7 Soil reaction (1:1 water)
(0-40in)7 – 8.3 Subsurface fragment volume <=3"
(0-40in)0 – 4 % Subsurface fragment volume >3"
(0-40in)Not specified Ecological dynamics
This ecological site description is based on nonequilibrium ecology and resilience theory and utilizes a State-and-Transition Model (STM) diagram to organize and communicate information about ecosystem change as a basis for management. The ecological dynamics characterized by the STM diagram reflect how changes in ecological drivers, feedback mechanisms, and controlling variables can maintain or induce changes in plant community composition (phases and/or states). Weather variables that dramatically change water depths and water chemistry, coupled with the application of various management actions, impact the ecological processes which influence the competitive interactions thereby maintaining or altering plant community structure. Due to these climatic and management factors, species composition within Plant Community Phases and States can be highly variable.
Drainage/Hydrological Manipulation: Hydrological manipulation (surface or tile drainage, pumping, surface water diversion, etc.) modifies this ecological site. For more detailed information on drainage/hydrological manipulation of the site, see the “Hydrology Functions” section of this document.
MLRA 55B has a wide variation of Shallow Marsh sites mainly driven by differences in water source and water chemistry. The Shallow Marsh ecological sites associated with sand plains in the MLRA are driven by ground water fluctuations and are mainly freshwater. Shallow Marsh ecological sites associated with till plains and lake plains commonly are driven by both ground water and runoff water (snowmelt and rainfall) from surrounding uplands. In some areas, this ground water can be saline and may impact the ecological site during the drawdown phase. In some Shallow Marsh ecological sites, water is also received from stream flow; typically, it has circumneutral pH (6.0–8.0) and high mineral and nutrient content. Refer to Site Development and Testing Plan section at end of this document.
This site developed under Northern Great Plains climatic conditions which included frequent droughts and wide fluctuations in temperature and precipitation which can result in both short-term and long-term changes in water levels and water chemistry (e.g. alkalinity/salinity). Unlike adjoining upland ecological sites, which are strongly influenced by grazing and fire, the primary ecological drivers for the Shallow Marsh ecological sites are hydrology and water chemistry. Hydrology is mainly a factor of landscape position, including the size of the contributing watershed, connectivity to other basins, ground water movement, and whether the basin has an outlet. Water chemistry is influenced by soil chemistry and whether the site is a recharge or flowthrough site.
Shallow Marsh ecological sites are highly influenced by water levels, including saturated soil, water movement, and water chemistry (i.e. recharge and flowthrough hydrology). Water levels, including soil saturation, influence fire effectiveness and livestock use. Water levels also influence exotic species invasion. As Shallow Marsh sites drawdown (drying and losing soil moisture), they transition to functioning similar to Wet Meadow ecological sites and can increase in salinity/alkalinity. Salt and grazing tolerant foxtail barley can dominate the site during the drawdown phase. Extended periods of drawdown accompanied by grazing may cause this site to function similar to a Saline Lowland or other upland ecological sites. Many factors will dictate the speed of exotic species invasion including duration of drawdown phase, management of the sites during the drawdown phase, change in soil chemistry, and availability of exotic species seed or plants parts. Exotic species invasion usually begins to occur on adjacent Wet Meadow ecological sites, within or between basins, and then moves into the Shallow Marsh ecological site. During extended periods of drawdown, presence of exotic species adjacent to the site and lack of fire or heavy continuous livestock grazing can speed up the invasion of foxtail barley and cool-season exotic grasses such as quackgrass and barnyard grass or forbs such as Canada thistle or sow thistle. Extended periods of drawdown will also allow upland invasive species, such as leafy spurge and Russian olive, to invade the site.
Once the site is invaded, increased water depth can inundate exotic species to a depth above plant height, causing considerable mortality, allowing restoration from the State 2: Native/Invaded State to the State 1: Reference State. Salt accumulation will be difficult to reverse back to levels prior to extended periods of drawdown and may take extended periods of inundation. In addition, exotic grasses (e.g. quackgrass) and foxtail barley can tolerate extended periods of inundation or saturation, which may never totally drown out along the outer margins of the adjacent Wet Meadow or Saline Lowland ecological sites. The continued presence of cool-season exotic grasses will cause this site to transition from State 1: Reference State and State 2: Native/Invaded State as water levels naturally fluctuate.
During extended periods of drawdown, heavy continuous grazing without adequate recovery periods following each grazing occurrence favors foxtail barley (e.g. Community Phase 2.2). During periods of normal water level, extended periods of no use or no fire often favor exotic species such as reed canarygrass (e.g. Community Phase 2.1) or hybrid cattail. Annual cropping of the site or adjacent upland sites increases nutrient and sediment movement into this ecological site favoring hybrid cattail (State 3.0).
At times, particularly during periods of soil saturation with little standing water, Shallow Marsh sites may be susceptible to pugging damage or hummocking of the soil by livestock walking on the site. Pugging is a form of soil compaction due to livestock activity which damages the soil structure. It can seal the soil surface which reduces infiltration and exacerbates waterlogging of the topsoil. The micro-topography created by pugging generally supports plants of more well drained conditions (e.g. adjacent uplands) and is often associated with an increase in weedy species. This can lead to a significant reduction in herbage production and utilization.
Four vegetative states (Reference, Native/Invaded, Invaded, and Go-Back) and a cropland state have been identified for the site . Within each state, one or more community phases have been identified. These community phases are named based on the more dominant water phases and visually conspicuous species and have been determined by study of historical documents, relict areas, scientific studies, and ecological aspects of plant species and plant communities. However, this ecological site is quite dynamic due to wide variations in water depth, water chemistry and other environmental factors. Management factors are also widely variable. As a result, the species composition and productivity of all states and community phases can vary considerably. Transitional pathways and thresholds have been determined through similar methods.
The following state and transition model diagram illustrates the common states, community phases, community pathways, transition and restoration pathways that can occur on the site. These are the most common plant community phases and states based on current knowledge and experience; changes may be made as more data are collected. Pathway narratives describing the site’s ecological dynamics reference various water regimes and are influenced by management practices (e.g. prescribed grazing, prescribed burning, brush management, herbaceous weed treatment) which, if properly designed and implemented, will positively influence plant community competitive interactions. The design of these management practices will be site specific and should be developed by knowledgeable individuals, based upon management goals, a resource inventory, and supported by an ongoing monitoring protocol.
Due to variations in management, climate, and other factors the botanical composition within Plant Community Phases and States can be highly variable. The sites are dominantly driven by water depth and water chemistry (local and regional). When the management goal is to maintain an existing plant community phase, modification of existing management to ensure native species have the competitive advantage may be required. To restore a previous state, or restore to another phase within the same state, water depth and water chemistry may need to be modified, which is rarely available to managers except under hydrological restoration applications. Whether using prescribed grazing, prescribed burning, or a combination of both with or without additional practices, the timing and method of application needs to favor the native species over the exotic species. Adjustments to account for variations in annual growing conditions and implementing an ongoing monitoring protocol to track changes and adjust management inputs to ensure desired outcome will be necessary.
The plant community phase composition table(s) has been developed from the best available knowledge including research, historical records, clipping studies, and inventory records. As more data are collected, plant community species composition and production information may be revised.State and transition model
More interactive model formats are also available. View Interactive Models
Click on state and transition labels to scroll to the respective textStates 1, 5 and 2 (additional transitions)
T1A - Invasion by exotic plants, no-use no fire, heavy season-long grazing, decrease in water regime R2A - Increased water depth T2A - Tillage with increased eutrophication and sedimentation R3A - Successful wetland restoration or seeding, increased water regime, chemical treatment and/or sediment/nutrient removal R3B - Successful wetland restoration or seeding, increased water depth, chemical treatment and/or sediment/nutrient removal, with successful buffer or upland restoration R4A - Cessation of annual cropping, successful wetland restoration/seeding, prescribed fire, vegetation management R4B - Cessation of annual cropping, failed wetland restoration/seeding, no-use and no fire R5A - Cessation of annual cropping State 1 submodel, plant communities
1.1A - Increase in water depth, above normal precipitation 1.1B - Drawdown phase, below normal precipitation, fresh 1.1C - Drawdown phase, below normal precipitation, more brackish 1.2A - Drawdown phase, below normal to normal precipitation 1.3A - Normal to above normal precipitation, increase in water depth 1.4A - Average to above average precipitation with increased water depth above plant height to cause plant mortality State 2 submodel, plant communities
2.1A - Heavy season-long grazing, drawdown phase, saline soils (discharge site) 2.2A - Prescribed grazing, increase in water depth 2.3A - Prescribed grazing, increase in water depth State 3 submodel, plant communities
State 4 submodel, plant communities
State 5 submodel, plant communities
State 1
ReferenceThis state represents the natural range of variability that dominated the dynamics of this ecological site prior to European settlement. Historically the primary disturbance mechanisms for this site in the reference condition were large fluctuations of the water table, water levels, soil saturation, and water chemistry (e.g. brackishness/ salinity/ alkalinity). Periodic fire and grazing by large herding ungulates were also historical disturbances that influenced this site but to a much lesser degree. Climate, spring snowmelt runoff and rainfall events, coupled with subsurface groundwater movement, combined with the timing of fires and grazing, dictated the dynamics that occurred within the natural range of variability.
Presently, the main disturbances are climate, weather events, water level fluctuations, lack of fire, concentrated livestock grazing, and agronomic activities on adjacent ecological sites (e.g. tillage, fertilizer and herbicide use, drainage). However, during drawdown phases, livestock grazing and a lack of fire impact this ecological site.
The Reference State is composed of four community phases. These phases are largely due to weather and climate factors resulting in considerable fluctuations in water levels and water chemistry (e.g. brackishness). Brackishness, along with water depth, is also a major factor influencing vegetation of the site. Brackishness can be natural due to the type of hydrology and soils of the site. Exotic perennial species do not exist in this state. Because of the changes in these and other environmental factors, the Reference State is becoming increasingly rare.
Characteristics and indicators. (i.e. characteristics and indicators that can be used to distinguish this state from others). Exotic species and hydrologic manipulation would not be present on this site when it is in State 1: Reference State
Resilience management. (i.e. management strategies that will sustain a state and prevent a transition). If intact, the reference state should be managed with current disturbance regimes which has permitted the site to remain in reference condition as well as maintaining the quality and integrity of associated ecological sites. Maintenance of the reference state is contingent upon a monitoring protocol to guide management.
Dominant plant species
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common rivergrass (Scolochloa festucacea), grass
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mannagrass (Glyceria), grass
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American sloughgrass (Beckmannia syzigachne), grass
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wheat sedge (Carex atherodes), other herbaceous
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chairmaker's bulrush (Schoenoplectus americanus), other herbaceous
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spikerush (Eleocharis), other herbaceous
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woolly sedge (Carex pellita), other herbaceous
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water knotweed (Polygonum amphibium), other herbaceous
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bur-reed (Sparganium), other herbaceous
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northern water plantain (Alisma triviale), other herbaceous
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hemlock waterparsnip (Sium suave), other herbaceous
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duckweed (Lemna), other herbaceous
Community 1.1
Normal Emergent Phase–Grasses/Sedges-Spikerushes-BulrushesThis community phase was historically the most dominant both temporally and spatially. Botanical composition can be quite variable due to variations in water chemistry and other factors. It is often dominated by tall and mid, cool-season graminoids along with sedges, spikerushes and bulrushes. The dominant grass species include common rivergrass (aka whitetop), , mannagrass (i.e. American mannagrass, fowl mannagrass), slimstem reedgrass, bluejoint, and American sloughgrass. Wheat sedge is the primary sedge; bulrushes may include common threesquare (may become dominant in brackish waters); and spikerush includes common spikerush and needle spikerush. Common forbs include bur-reed (mostly broadfuit bur-reed), spotted water hemlock, hemlock water parsnip, water knotweed, and common bladderwort. Moss (Drepanocladus spp.) often covers much of the soil surface during drawdown phase. Bulrushes, such as hardstem, river, or softstem bulrush may also be present in the transition zone to Deep Marsh ecological sites. Fowl bluegrass, northern reedgrass, and prairie cordgrass along with various forbs and sedges occur in the transition zone to Wet Meadow ecological sites.
Annual production can be quite variable but may range from 5800-7800 pounds per acre with graminoids and forbs contributing 95% and 5% of the production, respectively. This is the reference plant community phase and is described in the “Plant Community Composition and Group Annual Production” portion of this ecological site description.Figure 7. Annual production by plant type (representative values) or group (midpoint values)
Table 5. Annual production by plant type
Plant type Low
(lb/acre)Representative value
(lb/acre)High
(lb/acre)Grass/Grasslike 4250 5688 6750 Forb 250 813 1250 Total 4500 6501 8000 Figure 8. Plant community growth curve (percent production by month). ND5506 , Central Black 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 3 10 37 35 5 2 8 0 0 0 Community 1.2
Open Water Phase – Submergent Vegetation – Buttercup (Submergent Vegetation/Ranunculus spp.)This community phase occurs when increased precipitation or other factors cause the water levels to increase in depth for a sufficient period of time for the site to become dominated by open water species such as buttercup (e.g. yellow water buttercup, longbeak buttercup). With a decrease in water levels (e.g. return to average precipitation/runoff), the plant community should return to Community Phase 1.1.
Annual production can be quite variable due to wide variations in water chemistry, hydrology, and other factors.Figure 9. Plant community growth curve (percent production by month). ND5506 , Central Black 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 3 10 37 35 5 2 8 0 0 0 Community 1.3
Drawdown Phase – Fresh-Grasses/Sedges- Spikerushes/ (Grasses/Carex spp.-Eleocharis spp.)This community phase occurs during prolonged dry periods or other factors leading to decreased water depth with fresh-water conditions. Woolly sedge, spikerush (e.g. common spikerush, needle spikerush), slimstem reedgrass, and other sedges from the adjacent, drier sites encroach onto the site. With an increase in water depth (e.g. return to average precipitation) the plant community will readily return to Community Phase 1.1.
Annual production can be quite variable due to wide variations in water chemistry, hydrology, and other factors.Community 1.4
Drawdown Phase - Brackish-Foxtail Barely/Spikerushes/Dock-Goosefoot (Hordeum jubatum/Eleocharis spp./Rumex spp./Chenopodium spp.)This community phase occurs on some wetland soils during a drawdown phase causing more brackish conditions, perhaps coupled with heavy season-long grazing. This leads to a marked increase in foxtail barley, spikerush (e.g. common spikerush, needle spikerush), speedwell, dock (e.g. golden dock, western dock) and goosefoot (e.g. red goosefoot). American sloughgrass, knotweeds, and cinquefoils can also be a common associates of this community phase. Annual production and the extent of bare ground can be quite variable.
With continued heavy season-long grazing, increased soil compaction may result in high amounts of bare ground or in the colonization of exotic forbs and grasses. If this occurs, the site will likely begin transition to State 2: Native/Invaded State or State3: Invaded State.
.Pathway 1.1A
Community 1.1 to 1.2Community Phase 1.1 to 1.2 occurs with above average precipitation or other factors causing an increase in water depth sufficient to shift the vegetation from a diverse mixture of grasses, sedges, spikerushes, and bulrushes to one with more extensive open water supporting buttercup.
Pathway 1.1B
Community 1.1 to 1.3Community Phase 1.1 to 1.3 occurs with below average precipitation or other factors causing a drawdown phase with fresh water, shifting the vegetation to woolly sedge, spikerush, and slimstem reedgrass.
Pathway 1.1C
Community 1.1 to 1.4Community Phase 1.1 to 1.4 occurs during a drawdown phase with the water becoming more brackish. This shifts the dominant vegetation from a diverse mixture of grasses, sedges, spikerushes and bulrushes, to foxtail barley, spikerush, and dock.
Pathway 1.2A
Community 1.2 to 1.1Community Phase Pathway 1.2 to 1.1 occurs during times of below average precipitation or other conditions that result in a drawdown phase or drop in water levels sufficient to cause a shift in the vegetation from submergent species such as buttercup to a diverse mixture of grasses, sedges, spikerushes and bulrushes.
Pathway 1.3A
Community 1.3 to 1.1Community Phase Pathway 1.3 to 1.1 occurs during times of above average precipitation leading to an increase in water depth sufficient to cause a shift in the dominant vegetation from woolly sedge, spikerush, and slimstem reedgrass to a diverse mixture of grasses, sedges, spikerushes and bulrushes.
Pathway 1.3B
Community 1.3 to 1.4Community Phase Pathway 1.3 to 1.4 occurs with heavy season-long grazing leading to a change from grasses, woolly sedge, spikerush, and slimstem reedgrass to one dominated by foxtail barley, spikerush, and dock.
Context dependence.Season-long grazing, no change in precipitation
Pathway 1.4A
Community 1.4 to 1.1Community Phase Pathway 1.4 to 1.1 occurs with above average precipitation or other factors causing an increase in water depth sufficient to shift the vegetation from foxtail barley and associates to a diverse mixture of grasses, sedges, spikerushes and bulrushes.
State 2
Native/Invaded StateThis state is characterized by the colonization and establishment of minor amounts of exotic plants. Reed canarygrass is native to North America, but exotic strains (largely Eurasian) have been widely introduced and, along with their hybrids, can be quite invasive. Hybrid cattail, the hybrid between narrowleaf cattail and broadleaf cattail is also a common exotic. Canada thistle, and exotic strains of common reed may also invade the site. Although the site is still dominated by native plants, an increase in exotic plants can be expected. Unless a prescribed grazing and/or prescribed burning program is implemented, or an increase in water depth drowns out exotic species, a transition to State 3: Invaded State can be expected.
Three community phases have been identified for this state. The exotic species/hybrids can be expected to increase. Hybrid cattail and exotic strains/hybrids of reed canarygrass tend to form virtual monocultures and, as such, plants more desirable to wildlife and livestock decline.
Maintenance of communities on the periphery of the wetland (e.g. Wet Meadow ecological site, adjacent upland sites) are critical to the ecological integrity/functioning of the wetland ecosystem. If a buffer zone (50 feet minimum) is not maintained, an increase in eutrophication, sedimentation rate, and invasion by exotic species can be expected. For more information on buffer widths please refer to the Gilbert et.al. (2006) in the references section.
To slow or limit the invasion of these exotic species and their hybrids, it is imperative that managerial options (e.g. prescribed grazing, prescribed burning, maintaining intact buffers) be carefully constructed and evaluated with respect to that objective. If management does not include measures to control or reduce these exotic cool-season grasses, the transition to State 3: Invaded State should be expected (T2A).
Characteristics and indicators. The presence of trace amounts of exotic species/hybrids (e.g. cattail, reed canarygrass) indicates a transition from State 1 to State 2.
Resilience management. Implementation of management techniques and monitoring procedures designed to limit or control exotic species/hybrids.
Dominant plant species
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common rivergrass (Scolochloa festucacea), grass
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mannagrass (Glyceria), grass
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reed canarygrass (Phalaris arundinacea), grass
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common reed (Phragmites australis), grass
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wheat sedge (Carex atherodes), other herbaceous
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woolly sedge (Carex pellita), other herbaceous
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water knotweed (Polygonum amphibium), other herbaceous
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cattail (Typha), other herbaceous
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Canada thistle (Cirsium arvense), other herbaceous
Community 2.1
Normal Emergent Phase–Grasses/ Sedges-Spikerushes-Bulrushes/Exotics (Grasses/Carex spp.-Eleocharis spp.-Scripus spp.- Schoenoplectus spp./Exotics)This is the wetter community phase of State 2: Native/Invaded State. This community is similar to Community Phase 1.1. However, exotic species such as exotic strains (or their hybrids) of reed canarygrass, common reed, as well as hybrid cattail, curly dock, narrowleaf dock, oakleaf goosefoot, marshpepper knotweed, spotted ladysthumb, and others are now minor components of the community.
Annual production can be quite variable due to wide variations in water chemistry, hydrology, and other factors.Figure 10. Plant community growth curve (percent production by month). ND5506 , Central Black 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 3 10 37 35 5 2 8 0 0 0 Community 2.2
Drawdown Phase-Brackish-Foxtail Barely/Spikerushes/Exotics (Hordeum jubatum/Eleocharis spp./ExoticsThis is the drier, brackish community phase in State 2: Native/Invaded State. It is dominated by foxtail barley in association with spikerush, dock, and various native forbs such as water knotweed, Mexican dock, curlytop knotweed, Pursh seepweed, goosefoot, and others. Exotic plants may include exotic strains/hybrids of reed canarygrass, common reed, as well as hybrid cattail, curly dock, narrowleaf dock, oakleaf goosefoot, marshpepper knotweed, spotted ladysthumb, and others which are now minor components of the community. Absinthium (aka wormwood) may also become prominent if the basin dries-up.
Annual production and the extent of bare ground can be quite variable.Community 2.3
Drawdown Phase–Fresh-Spikerushes/Hybrid Cattail (Eleocharis ssp/Typha x glauca)This is the drier, fresher community phase in State 2: Native/Invaded State. It is dominated by spikerushes and hybrid cattail. Swamp ragwort, kochia, cocklebur, pale smartweed, and other rather weedy forbs are also common. Exotic strains/hybrids of reed canarygrass and common reed may also become minor components of the community. Absinthium (aka wormwood), Canada thistle, and sow thistle may also become prominent if the basin dries-up.
Pathway 2.1A
Community 2.1 to 2.2Community Phase Pathway 2.1 to 2.2 occurs with heavy-season-long grazing coupled with a drawdown phase and saline soils (discharge site). As the pathway progresses, native plant diversity declines while foxtail barley, spikerush, sedges, knotweed, dock, and exotic forbs increase.
Pathway 2.1B
Community 2.1 to 2.3Community Phase Pathway 2.1 to 2.3 occurs with heavy-season-long grazing coupled with a drawdown phase and non-saline soils (recharge/flowthrough site). As the pathway progresses the site becomes more dominated by spikerushes and hybrid cattail.
Pathway 2.2A
Community 2.2 to 2.1Community Phase Pathway 2.2 to 2.1 occurs with the implementation of prescribed grazing with the return to near average precipitation resulting in increased water depth. This leads to a shift from foxtail barley, spikerush, dock, and exotic forbs to one of a diverse mixture of grasses, sedges, spikerushes, and bulrushes along with exotic grasses and exotic forbs.
Pathway 2.3A
Community 2.3 to 2.1Community Phase 2.3 to 2.1 occurs with the implementation of prescribed grazing with the return to near average precipitation resulting in increased water depth. This leads to increasing prevalence of emergent species such as bulrushes, spikerushes, and sedges.
State 3
Invaded StateThis state occurs when the site becomes dominated by exotic plants. The threshold for this state may be reached when hybrid cattail or the exotic strains/hybrids of reed canarygrass exceed 30% of the plant community and native plants represent less than 40% of the community.
One plant community phase has been identified for this state. It is typically dominated by hybrid cattail or exotic strains/hybrids of reed canarygrass. Other exotic species may include Canada thistle, purple loosestrife, flowering rush, and exotic strains/hybrids of common reed. These species typically form virtual monocultures; as a result, plant diversity is low and habitat suitability for some wildlife species is low as well (e.g. hybrid cattail dominated wetlands may not provide waterfowl habitat but may provide white-tailed deer winter habitat). Once this state is established, restoration efforts have proven difficult.
Characteristics and indicators. (i.e. characteristics that can be used to distinguish this state from others). This site is characterized by exotic species/hybrids dominating the site and controlling the ecological processes (i.e. approximately 30 to 40%).
Resilience management. Once established, reed canarygrass and hybrid cattail are very resilient and will withstand grazing, haying pressure and non-use.
Dominant plant species
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common reed (Phragmites australis), grass
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reed canarygrass (Phalaris arundinacea), grass
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cattail (Typha), other herbaceous
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Canada thistle (Cirsium arvense), other herbaceous
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purple loosestrife (Lythrum salicaria), other herbaceous
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flowering rush (Butomus umbellatus), other herbaceous
Community 3.1
Hybrid Cattail and/or Reed Canarygrass (Typha x glauca or Phalaris arundinacea)Hybrid cattail or exotic strains/hybrids of reed canarygrass often dominate State 3: Invaded State. Whether hybrid cattail or reed canarygrass dominate the site is largely determined by which species’ propagules (presence/abundance) are present on the site. Exotic strains of common reed are also known to invade the site. Diversity plummets with dominance by either of these species, as both form monotypic stands.
Hybrid cattail is the hybrid of narrowleaf cattail and broadleaf cattail. The hybrid is also known to backcross with the broadleaf cattail. It is widely regarded as aggressive or invasive and typically forms monotypic stands. It is particularly adapted to nutrient enriched habitats with high sedimentation (i.e. associated with tillage, siltation, drainage).
Reed canarygrass and common reed are native to North America, but exotic strains have repeatedly been introduced over the years. These exotic strains and their hybrids are regarded as aggressive or invasive, often forming monotypic stands.
Reed canarygrass, common reed, and hybrid cattail are highly adaptive and managerial efforts to control them has been difficult (see Restoration R3A).
Annual production can be quite variable due to wide variations in water chemistry, hydrology, and other factors.State 4
Go-back StateGo-Back State often results following cropland abandonment during periods of extended, below average precipitation or drought and consists of only one plant community phase which often is composed of a variety of annual forbs, grasses, spike rushes, etc. including noxious weeds (e.g. Canada thistle) which may need control. Over time, the site will likely become dominated by exotic strains or hybrids of reed canarygrass and/or hybrid cattail.
This state is highly variable depending on the level and duration of disturbance related to the T5A pathway. In this MLRA, the most probable origin of this state is plant succession following crop abandonment. This plant community will initially include a variety of annual forbs and grasses, some of which maybe noxious weeds.
Characteristics and indicators. Tillage has destroyed the native plant community, altered soil structure and biology, increased eutrophication, reduced soil organic matter, and results in the formation of a tillage induced compacted layer which is restrictive to root growth. Noxious weeds, if present, will need to be managed.
Dominant plant species
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foxtail barley (Hordeum jubatum), grass
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reed canarygrass (Phalaris arundinacea), grass
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sloughgrass (Beckmannia), grass
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spikerush (Eleocharis), grass
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speedwell (Veronica), other herbaceous
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dock (Rumex), other herbaceous
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goosefoot (Chenopodium), other herbaceous
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knotweed (Polygonum), other herbaceous
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Canada thistle (Cirsium arvense), other herbaceous
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cattail (Typha), other herbaceous
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field sowthistle (Sonchus arvensis), other herbaceous
Community 4.1
Annual/Pioneer Perennial/ExoticsMost commonly, this plant community is associated with the cessation of cropping without the benefit of restoration efforts, resulting in a “go-back” situation. This community phase may be quite variable in composition. Vegetation is generally a mix of pioneer species, both native and exotic, as well as some native and exotic perennials such as foxtail barley, reed canarygrass, slough grass, spikerush, speedwell, dock, goosefoot, knotweeds, absinth wormwood, Canada thistle, hybrid cattail, water horehound, field sowthistle, and others. Annual production can be quite variable due to wide variations in water chemistry, hydrology, and other factors.
Soil conditions can be quite variable on the site, in part due to variations in the management/cropping history (e.g. development of a tillage induced compacted layer, erosion, fertility (degree of eutrophication), sedimentation herbicide/pesticide carryover). Thus, soil conditions should be assessed when considering restoration techniques.State 5
CroplandThis state is the result of annual cropping.
Community 5.1
CroplandMost commonly, this plant community is associated with the cessation of cropping without the benefit of restoration efforts, resulting in a “go-back” situation. Soil conditions can be quite variable on the site, in part due to variations in the management/cropping history (e.g. development of a tillage induced compacted layer, erosion, fertility (degree of eutrophication), sedimentation herbicide/pesticide carryover). Thus, soil conditions should be assessed when considering restoration techniques.
Transition T1A
State 1 to 2This is the transition from the State 1: Reference State to State 2: Native/Invaded State resulting from the colonization and establishment of exotic plants, often exotic strains of reed canarygrass or hybrid cattail. Other exotics known to invade the site include Canada thistle, purple loosestrife, flowering rush, and hybrid strains of common reed. Heavy season-long grazing, prolonged periods of no-use and no fire, and a decrease in the water regime of the site are often involved with this transition. Excessive litter accumulation provides conditions favorable to hybrid cattail or exotic strains/hybrids of reed canarygrass which can quickly spread to form virtual monocultures. As a result, the transition to State 3: Invaded State can be expected.
Constraints to recovery.(i.e. variables or processes that preclude recovery of the former state). Restoration to State 1 is dependent upon hydrology, condition of adjacent upland ecological sites (i.e. cropland), and abundance of exotic species.
Transition T1B
State 1 to 3This is the transition from State 1: Reference State to State 3: Invaded State. Although the State 3: Invaded State often forms via State 2: Native/Invaded State, this direct transition to State 3: Invaded State can occur with tillage of the Shallow Marsh ecological site or adjacent upland with an associated increase in eutrophication and sedimentation resulting in vegetation dominance by hybrid cattail or exotic strains/hybrids of reed canarygrass.
Constraints to recovery.Restoration to State 1 is dependent upon hydrology, condition of adjacent upland ecological sites (i.e. cropland), and abundance of exotic species.
Context dependence.Tillage with increased eutrophication and sedimentation
Transition T1c
State 1 to 5Removal of vegetative cover and tilling for agricultural crop production.
Restoration pathway R2A
State 2 to 1This restoration pathway from State 2: Native/Invaded State to State 1: Refence State is initiated by an increase in water depth sufficient to drown out invasive exotic species. Success of this pathway is dependent upon the invasive species present in State 2 Native/Invaded State. Hybrid cattail, reed canary grass, or perhaps exotic strains of common reed will likely persist with increased water levels, whereas foxtail barley, dock, or Canada and sow thistle will drown out.
Context dependence.(i.e. factors that cause variations in plant community shifts, restoration likelihood, and contribute to uncertainty). Hydrological restoration/management to remove exotic species/hybrids which may necessitate chemical control. Adjacent upland ecological sites will need to remain intact or reseeded to native species in order to prevent sedimentation and nutrient loading to Shallow Marsh ecological site. Prescribed grazing techniques may provide a short-term reduction in reed canarygrass density; however, a combination of mowing and prescribed burning may be more effective than prescribed grazing alone.
Transition T2A
State 2 to 3The transition from State 2: Native/Invaded State to State 3: Invaded State can occur with tillage within the site or on adjacent upland sites resulting in an increase in eutrophication and sedimentation leading to a dominance of hybrid cattail or exotic strains/hybrids of reed canarygrass. Studies indicate that a threshold may exist in the transition to this Native/Invaded State on some upland ecological sites when Kentucky bluegrass exceeds 30% of the plant community and native grasses represent less than 40% of the plant community composition. Similar thresholds may exist for exotic strains of reed canarygrass and hybrid cattail on this site.
Constraints to recovery.Restoration to State 2 is dependent upon hydrology and abundance of exotic species/hybrids.
Transition T2b
State 2 to 5Removal of vegetative cover and tilling for agricultural crop production.
Restoration pathway R3A
State 3 to 1This restoration pathway from State 3: Invaded State to State 1: Reference State can rarely be accomplished. The likelihood of a successful wetland restoration through hydrological restoration, seeding, increased water regime, chemical treatment, and/or sediment/nutrient removal is limited due the persistence of exotic invasive species such as hybrid cattail or reed canarygrass. A successful upland restoration is also needed to reduce the likelihood of exotic species invasion or continued sedimentation or nutrient loading. It is more likely that a wetland restoration effort that is considered to be successful will eventually end up in State 2 Native/Invaded State.
Context dependence.Reed canarygrass and hybrid cattail are difficult to control, largely due to vigorous spreading rhizomes, high seed production, and a large seed bank. Various control techniques may show signs of success but are often short-term with vegetation reverting within a few years. Adjacent upland ecological sites will need to remain intact or be reseeded to native species in order to prevent sedimentation and nutrient loading to Shallow Marsh ecological site. Prescribed grazing (e.g. heavy seasonal), high-intensity burns, and herbicides have shown some success in reducing the dominance by reed canarygrass. However, within several years the vegetation often reverts. Herbicides can be effective in reducing or eliminating hybrid cattail and can be followed by reseeding (or plugging) desirable species. Prescribed burning has also been effective during dry periods where fire temperatures may kill rhizomes and seeds. Although expensive, mechanical removal of the substrate has also been an effective technique.
Restoration pathway R3B
State 3 to 2This restoration pathway from State 3: Invaded State to State 2: Native/Invaded State results from a failed restoration or seeding, increased water regime, chemical treatment, and/or sediment/nutrient removal with failed buffer or upland restoration.
Context dependence.This restoration pathway from State 3: Invaded State to State 2: Native/Invaded State results from a failed restoration or seeding, increased water regime, chemical treatment, and/or sediment/nutrient removal with failed buffer or upland restoration. Context dependence. Reed canarygrass and hybrid cattail are difficult to control, largely due to vigorous spreading rhizomes, high seed production, and a large seed bank. Various control techniques may show signs of success but are often short-term with vegetation reverting within a few years. Prescribed grazing (e.g. heavy seasonal), high-intensity burns, and herbicides have shown some success in reducing the dominance by reed canarygrass. However, within several years the vegetation often reverts. Herbicides can be effective in reducing or eliminating hybrid cattail and can be followed by reseeding (or plugging) desirable species. Prescribed burning has also been effective during dry periods where fire temperatures may kill rhizomes and seeds. Although expensive, mechanical removal of the substrate has also been an effective technique
Transition T3a
State 3 to 5Removal of vegetative cover and tilling for agricultural crop production.
Restoration pathway R4A
State 4 to 2This restoration pathway from State 4: Go-Back State to State 2: Native/Invaded State results from cessation of annual cropping, successful wetland restoration/ seeding/ plugging, prescribed burning, and vegetation management.
Context dependence.If manipulated, hydrology needs to be restored. Elevated soil nitrogen levels and sedimentation have been shown to benefit reed canarygrass and hybrid cattail. Sedimentation may need to be removed to preexisting conditions. A successful range planting will include proper seedbed preparation, weed control (both prior to and after the planting), selection of adapted native species representing functional/structural groups inherent to the State 1, and proper seeding technique. Management (e.g. prescribed grazing, prescribed burning) during and after establishment must be applied in a manner that maintains the competitive advantage for the seeded native species.
Restoration pathway R4B
State 4 to 3This restoration pathway from State 4: Go-Back State to State 3: Invaded State results from cessation of annual cropping followed by a failed wetland restoration/seeding with no use and no fire.
Context dependence.Failure to restore hydrology and failed range plantings can result from many causes, both singularly and in combination, including: drought, poor seedbed preparation, improper seeding methods, seeded species not adapted to the site, insufficient weed control, herbicide carryover, poor seed quality (purity & germination), improper management.
Transition T4a
State 4 to 5Removal of vegetative cover and tilling for agricultural crop production.
Restoration pathway R5b
State 5 to 3This transition from any plant community to State 4: Go-Back State. Most commonly, it is associated with the cessation of cropping without the benefit of restoration efforts, resulting in a “go-back” situation. Soil conditions can be quite variable on the site, in part due to variations in the management/cropping history (e.g. development of a tillage induced compacted layer, erosion, fertility (degree of eutrophication), sedimentation herbicide/pesticide carryover). Thus, soil conditions should be assessed when considering restoration techniques.
Restoration pathway R5A
State 5 to 4This transition from any plant community to State 4: Go-Back State. Most commonly, it is associated with the cessation of cropping without the benefit of restoration efforts, resulting in a “go-back” situation. Soil conditions can be quite variable on the site, in part due to variations in the management/cropping history (e.g. development of a tillage induced compacted layer, erosion, fertility (degree of eutrophication), sedimentation herbicide/pesticide carryover). Thus, soil conditions should be assessed when considering restoration techniques.
Additional community tables
Table 6. Community 1.1 plant community composition
Group Common name Symbol Scientific name Annual production () Foliar cover (%) Grass/Grasslike1 Grasses 1300–2600 common rivergrass SCFE Scolochloa festucacea 975–1625 – mannagrass GLYCE Glyceria 130–650 – American sloughgrass BESY Beckmannia syzigachne 65–325 – prairie cordgrass SPPE Spartina pectinata 0–195 – northern reedgrass CASTI3 Calamagrostis stricta ssp. inexpansa 0–195 – reed canarygrass PHAR3 Phalaris arundinacea 0–195 – Grass, perennial 2GP Grass, perennial 0–130 – 2 Grass-likes 1625–2600 wheat sedge CAAT2 Carex atherodes 975–2275 – Grass-like (not a true grass) 2GL Grass-like (not a true grass) 65–650 – woolly sedge CAPE42 Carex pellita 130–455 – spikerush ELEOC Eleocharis 65–325 – chairmaker's bulrush SCAM6 Schoenoplectus americanus 65–325 – Forb3 Forbs 325–1300 water knotweed POAM8 Polygonum amphibium 195–975 – bur-reed SPARG Sparganium 65–520 – northern water plantain ALTR7 Alisma triviale 65–455 – Forb, perennial 2FP Forb, perennial 0–325 – hemlock waterparsnip SISU2 Sium suave 65–195 – duckweed LEMNA Lemna 65–195 – western dock RUAQ Rumex aquaticus 0–130 – buttercup RANUN Ranunculus 0–130 – arumleaf arrowhead SACU Sagittaria cuneata 0–130 – broadleaf cattail TYLA Typha latifolia 0–65 – Table 7. Community 1.2 plant community composition
Group Common name Symbol Scientific name Annual production () Foliar cover (%) Table 8. Community 1.3 plant community composition
Group Common name Symbol Scientific name Annual production () Foliar cover (%) Table 9. Community 1.4 plant community composition
Group Common name Symbol Scientific name Annual production () Foliar cover (%) Table 10. Community 2.1 plant community composition
Group Common name Symbol Scientific name Annual production () Foliar cover (%) Table 11. Community 2.2 plant community composition
Group Common name Symbol Scientific name Annual production () Foliar cover (%) Table 12. Community 2.3 plant community composition
Group Common name Symbol Scientific name Annual production () Foliar cover (%) Table 13. Community 3.1 plant community composition
Group Common name Symbol Scientific name Annual production () Foliar cover (%) Table 14. Community 4.1 plant community composition
Group Common name Symbol Scientific name Annual production () Foliar cover (%) Table 15. Community 5.1 plant community composition
Group Common name Symbol Scientific name Annual production () Foliar cover (%) Interpretations
Supporting information
Inventory data references
Information presented here has been derived from NRCS and other federal/state agency clipping and inventory data. Also, field knowledge of range-trained personnel was used. All descriptions were peer reviewed and/or field-tested by various private, state and federal agency specialists. Those involved in developing this site description include: Stan Boltz, NRCS Range Management Specialist; David Dewald, NRCS State Biologist; Jody Forman, NRCS Range Management Specialist; Jeff Printz, NRCS State Range Management Specialist; Kevin Sedivec, Extension Rangeland Management Specialist; Shawn Dekeyser, North Dakota State University; Rob Self, The Nature Conservancy and Lee Voigt, NRCS Range Management Specialist. MLRA 55D was split from MLRA 55B in 2022. Many of the site concepts for this MLRA are borrowed from neighboring MLRA 55B pending further vegetation and soils validation.
Other references
High Plains Regional Climate Center, University of Nebraska, 830728 Chase Hall, Lincoln, NE 68583-0728. (http://hpccsun.unl.edu)
United States Department of Agriculture, Natural Resources Conservation Service. 2022. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture, Agriculture Handbook 296.
USDA, NRCS. National Water and Climate Center, 101 SW Main, Suite 1600, Portland, OR 97204-3224. (http://wcc.nrcs.usda.gov)
USDA, NRCS. National Range and Pasture Handbook, September 1997
USDA, NRCS. National Soil Information System, Information Technology Center, 2150 Centre Avenue, Building A, Fort Collins, CO 80526. (http://nasis.nrcs.usda.gov)
USDA, NRCS. 2001. The PLANTS Database, Version 3.1 (http://plants.usda.gov). National Plant Data Center, Baton Rouge, LA 70874-4490 USA.
USDA, NRCS, Various Published Soil Surveys.Contributors
Stan Boltz, NRCS Range Management Specialist
David Dewald, NRCS State Biologist
Kevin Sedivec, Extension Rangeland Management Specialist
Jeff Printz, NRCS State Range Management Specialist
Shawn Dekeyser, North Dakota State University
Jody Forman, NRCS Range Management Specialist
Rob Self, The Nature Conservancy
Lee Voigt, NRCS Range Management Specialist
Ezra Hoffman, Ecological Site Specialist, NRCSApproval
Suzanne Mayne-Kinney, 11/14/2024
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) Contact for lead author Date 11/14/2024 Approved by Approval date Composition (Indicators 10 and 12) based on Annual Production Indicators
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Number and extent of rills:
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Presence of water flow patterns:
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Number and height of erosional pedestals or terracettes:
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Bare ground from Ecological Site Description or other studies (rock, litter, lichen, moss, plant canopy are not bare ground):
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Number of gullies and erosion associated with gullies:
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Extent of wind scoured, blowouts and/or depositional areas:
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Amount of litter movement (describe size and distance expected to travel):
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Soil surface (top few mm) resistance to erosion (stability values are averages - most sites will show a range of values):
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Soil surface structure and SOM content (include type of structure and A-horizon color and thickness):
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Effect of community phase composition (relative proportion of different functional groups) and spatial distribution on infiltration and runoff:
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Presence and thickness of compaction layer (usually none; describe soil profile features which may be mistaken for compaction on this site):
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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:
Sub-dominant:
Other:
Additional:
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Amount of plant mortality and decadence (include which functional groups are expected to show mortality or decadence):
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Average percent litter cover (%) and depth ( in):
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Expected annual annual-production (this is TOTAL above-ground annual-production, not just forage annual-production):
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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:
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Perennial plant reproductive capability:
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