Natural Resources
Conservation Service
Ecological site R078CY017OK
Deep Sand Shrubland
Last updated: 9/15/2023
Accessed: 12/22/2024
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.
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): 078C–Central Rolling Red Plains, Eastern Part
MLRA 78C is characterized by moderately dissected, rolling plains with prominent ridges and valleys and numerous terraces adjacent to dissecting streams. Loamy and clayey soils are generally deep, well drained, and developed in calcareous and gypsiferous sediments of Permian age.
LRU notes
NA
Classification relationships
This ecological site is correlated to soil components at the Major Land Resource Area (MLRA) level which is further described in USDA Ag Handbook 296.
Ecological site concept
These sites are on rolling to relatively flat, deep sandy soils. The reference vegetation consists of native tallgrass and midgrass species mixed with Shinnery Oak shrubs and forbs. This plant community evolved under periodic fire and grazing events. The fires would remove top growth of the oaks and allow the tall and midgrass species to flourish. Without periodic fires, the woody species flourish and may begin to dominate some of the ecological functions of the site. Under abusive grazing practices, the more palatable tall and midgrass species may decline, giving way to species that are less desirable for grazing operations.
Associated sites
| R078CY014OK |
Rolling Sands Lamellic sands. Typically do not support Shinnery Oak. Rolling topography with some sand sagebrush and sand plum. Predominately grasses. |
|---|
Table 1. Dominant plant species
| Tree |
(1) Quercus havardii |
|---|---|
| Shrub |
Not specified |
| Herbaceous |
(1) Andropogon hallii |
Physiographic features
These sites are the shinnery oak grasslands located on the western side of MLRA 78C in six Oklahoma counties and three Texas panhandle counties. Oklahoma counties involved are Beckham, Blaine, Dewey, Ellis, Roger Mills and Woodward. Woodward is the northernmost boundary for shinnery oak grassland within the MLRA. The three Texas counties are Gray, Hemphill and Wheeler. These sites are deep sands that are nearly level to rolling uplands.
Figure 2. R078CY017OK
Table 2. Representative physiographic features
| Landforms |
(1)
Alluvial plain
> Dune
(2) Alluvial plain > Terrace (3) Alluvial plain > Sand sheet |
|---|---|
| Runoff class | Negligible to medium |
| Flooding frequency | None |
| Ponding frequency | None |
| Elevation | 305 – 975 m |
| Slope | 0 – 20% |
| Ponding depth | 0 cm |
| Water table depth | 0 cm |
| Aspect | Aspect is not a significant factor |
Climatic features
MLRA 78C extends north and south from Coldwater, Kansas to just northeast of San Angelo, Texas (Ballinger, Texas), and east to west from Weatherford, Oklahoma to west of Shamrock, Texas. The weather is alternately influenced by cold dry air from the Arctic Circle, and warm moist air from the Gulf of Mexico. Seasonal changes are gradual. Spring is a season of variable weather and relatively high precipitation with prevailing winds from the southwest. Summers are generally hot with low humidity. Fall has long periods of pleasant weather interspersed with moderate to heavy rains. Winter is open and moderate to cold with winds from the north and infrequent snows. Approximately 75 percent of the rainfall occurs during the warm season, and much of it comes in storms of high intensity and short duration in May and June. These rains can be particularly erosive on sites where vegetation is sparse. Occasional droughts are to be expected. Lack of rainfall and hot, dry winds often curtail forage production during July and August.
Table 3. Representative climatic features
| Frost-free period (characteristic range) | 163-201 days |
|---|---|
| Freeze-free period (characteristic range) | 192-223 days |
| Precipitation total (characteristic range) | 660 mm |
| Frost-free period (actual range) | 161-205 days |
| Freeze-free period (actual range) | 191-230 days |
| Precipitation total (actual range) | 660-686 mm |
| Frost-free period (average) | 185 days |
| Freeze-free period (average) | 208 days |
| Precipitation total (average) | 660 mm |
Figure 3. Monthly precipitation range
Figure 4. Monthly minimum temperature range
Figure 5. Monthly maximum temperature range
Figure 6. Monthly average minimum and maximum temperature
Figure 7. Annual precipitation pattern
Figure 8. Annual average temperature pattern
Climate stations used
-
(1) COLDWATER [USC00141704], Coldwater, KS
-
(2) MUTUAL [USC00346139], Mutual, OK
-
(3) CLINTON SHERMAN AP [USW00003932], Dill City, OK
-
(4) LAKE KEMP [USC00414982], Seymour, TX
-
(5) ANSON 3ESE [USC00410268], Anson, TX
Influencing water features
There are no influencing water features in this site.
Wetland description
NA
Soil features
Soils are deep, sandy, permeable soils that readily accept moisture and have minimal runoff under reference conditions,. These soils have deep sandy profiles with lamellic bands: very thin, clay bands containing small amounts of sand ranging from one-eighth inch to one half inch and rarely thicker, running through the profile at different depths. These lamellae bands are normally present where shinnery oak is found and also account for occurrence of Indiangrass within the sands. These soils are very suitable for high-quality root development. This excellent root development environment, coupled with readily available moisture, encourages shinnery oak growth. But, because these soils are low in fertility and moisture holding capacity, vegetation is always a mixture of shinnery oak and prairie grasses.
Representative soils: Delwin, Heatly and Nobscot.
Table 4. Representative soil features
| Parent material |
(1)
Alluvium
–
sandstone
|
|---|---|
| Surface texture |
(1) Fine sand (2) Loamy fine sand |
| Family particle size |
(1) Sandy |
| Drainage class | Well drained to somewhat excessively drained |
| Permeability class | Moderate to very rapid |
| Soil depth | 203 cm |
| Surface fragment cover <=3" | 0% |
| Surface fragment cover >3" | 0% |
| Available water capacity (0-101.6cm) |
4.57 – 13.72 cm |
| Calcium carbonate equivalent (0-101.6cm) |
0 – 5% |
| Electrical conductivity (0-101.6cm) |
0 – 1 mmhos/cm |
| Sodium adsorption ratio (0-101.6cm) |
0 – 1 |
| Soil reaction (1:1 water) (0-101.6cm) |
5.1 – 8.4 |
| Subsurface fragment volume <=3" (Depth not specified) |
0 – 2% |
| Subsurface fragment volume >3" (Depth not specified) |
0% |
Ecological dynamics
This is a unique, easily recognizable, site of short shinnery oak, usually around 3 feet tall, with tallgrasses usually growing up through the oak canopy. The Reference Plant Community of the Deep Sand Shrubland R078CY017OK site is primarily tallgrasses and midgrasses with an understory, or at times an overstory, of shinnery oak brush (also referred to as shinnoak brush, Quercus Havardii). Sometimes called Shinnoak Shrub Grassland this site is found on coarse deep sands including shallow sandsheet and dunes, and some soils with loamy components. These areas are typically associated with sand dropseed and little bluestem, but Shinnery oak grasslands are almost always co-dominated with shrubs and tallgrasses; and a fairly rich mix of forbs and non-dominant grasses. The co-dominant tallgrasses and s midgrasses are usually taller than the oak itself. Although shinnery oak may make up 80-90% of the ground cover, it only makes up 5%-25% of the plant composition. The appearance of shinnery oak stands that are ungrazed may resemble tallgrass or mixed grass prairie because the oak may be hidden by the taller grasses. Shinnery oak is found intermixed with shortgrasses, midgrasses and tallgrasses. Shortgrasses include blue, black, and hairy gramas, sandbur, windmillgrass, false buffalograss and three-awn. The midgrasses are little bluestem, sand dropseed, spike dropseed, fall witchgrass, sand paspalum, plains bristlegrass, sideoats grama, and red and sand lovegrasses. Tallgrasses include sand bluestem, big bluestem, switchgrass, Indiangrass and giant dropseed. These midgrass, tallgrass and oak components are well adapted to most fire regime variations. Thus, the shinnery oak ecosystem contained a diverse mix of grasses and forbs along with the prevalent shinnery oak. The denser forms of shinnery oak historically dominated 15% to 40% of the plant composition, with the exception of the small mottes of hybrids that could retain their dense canopies dependent up on fire return intervals. After a fire, the taller grasses would rise above the typical shin-high level of the oak and historic records indicate that frequent fires typically top killed the oak. This treatment was sufficient to allow grasses to be temporarily taller than the oak for 1-3 years after which the shinnery oak typically regains dominance over the understory grasses. In this way, the fires that historically occurred provided for a frequently changing vertical dominance by the grasses and oak.
Interruption of the natural fire regime likely had as much to do with modification of oak and sand sage in Oklahoma and mesquite in Texas and New Mexico as did long term overgrazing by domestic livestock. The fire return interval for shinnery oak ecosystems is not well known; however, there are commonalities between the herbaceous compositions and fuel ignitions sources between shinnery oak and tallgrasses (Boyd and Bidwell 2002). This leads to the reasoning that the fire return interval would have been similar to that of the tallgrass, which is between 5-10 years (Wright and Bailey 1982).
Without any disturbance, shinnery oak may form near monotypic stands. Above-ground shinnery growth averages 1-3 feet in height with occasional hybrid mottes up to 5-12 feet high, that are hybridized with other oak species (Pettit 1994, Peterson and Boyd 1998, Dhillion et al 1999, Hoagland 2000). These dense stands tend to be lower in bare ground while having less stems per acre than those affected by disturbance like fire. (Boyd and Bidwell 2002) Other woody plants that can be present within the site include sand sagebrush, sand plum and fragrant sumac, whose densities react to return interval of fire like other woody plants.
Changes in structure of shinnery oak communities may relate to simultaneous alterations of fire regime and livestock grazing (Boyd and Bidwell 2002). Shinnery oak ecosystems have been historically grazed for the past century by domestic livestock and for thousands of years by bison and other large ungulates (USDA Forest Service 1999). Continuous overgrazing by domestic livestock and interruptions to the natural fire regime can reduce the grass and forb component within the shinnery.
Vegetation inventories conducted on the Black Kettle Grassland show that approximately 50-60% of the NFS lands on this Grassland are currently in the shinnery oak vegetation type. The Vegetation Dynamics Development Tool (VDDT) data indicates that approximately 80-90% of the Black Kettle may have been shinnery oak historically. There is still some scientific uncertainty about the cause for this discrepancy, although it was agreed that a portion of this discrepancy is attributable to the standard deviations, the inherent problems using satellite imagery, as well as differences in the methods used for the existing mid-scale vegetation inventory compared to those used for the potential natural vegetation inventory for the VDDT model. Resource management specialists from Black Kettle Grassland that have been studying and managing the shinnery oak ecosystem and the shinnery oak research study on the Black Kettle, attribute the disparity primarily to historical deep and repeated plowing of some of the shinnery oak ecosystem lands before they came into Forest Service management. Approximately 34% of the Black Kettle Grassland was plowed historically, and those appear to be the areas that are remaining grass-dominated, based on comparisons using the GIS Database Maps of Prescribed Burns, PNVT’s, and Existing Vegetation. Some of the plowed units were not burned for over a decade and others were included in burns of varying cycles (3-9 year cycles). Plowed areas currently dominated by grasses have not recovered to shinnery oak under any fire regime. Although, managers have observed rapid recovery in shinnery oak where viable root systems are present in unplowed lands and these population regain dominance over grasses within about 3 years following application of a typical prescribed burn.
There was repetitive, deep plowing that began in the early 1900’s and continues today to convert shinnery oak savannahs to farmland on some lands. As a result of this repeated deep plowing, shinnery oak roots and rhizomes were destroyed, preventing the shinnery oak from ever recovering. There is an apparent lack of shinnery oak regeneration after successive years of cultivation (Boyd and Bidwell 2002). Current communities of shinnery oak are not showing any signs of spread, so it is unlikely that there are treatments to promote spread of shinnery oak from the unplowed units to the plowed units (Boyd and Bidwell 2002).
STATE AND TRANSITIONAL PATHWAYS (DIAGRAM):
The following diagram suggests some pathways that the vegetation on this site might take. There may be other states not shown on the diagram. This information is intended to show what might happen in a given set of circumstances; it does not mean that this would happen the same way in every instance. Local professional guidance should always be sought before pursuing a treatment scenario.
As a site changes in the structure and makeup of the plant community, the changes may be due to management, or to natural occurrences, or both. At some point in time, thresholds may be crossed. This means that once plant community changes have progressed to a certain point, the balance of the community has been altered to the extent that a return to the former state is not possible, that is, not possible unless some form of outside energy is applied to make it happen. These changes take place on all ecological sites, but some sites support communities that are more resistant to change. Also, some sites are more resilient in general and tend to heal or restore themselves more quickly or easily than others. Changes in management practices alone, such as prescribed grazing, will not be sufficient to restore former plant communities. An example of an outside energy input might be the implementation of prescribed chemical brush management to decrease the amount of woody shrubs and increase the amount of grasses and forbs. This shift in plant community balance could not be brought about with prescribed grazing alone. The amount of energy required to bring about a change in the plant community balance may vary greatly depending on the present plant community state and the desired community state.
State and transition model
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Click on state and transition labels to scroll to the respective text
Ecosystem states
| T1A | - | Mechanical or chemical removal of woody species |
|---|---|---|
| T1C | - | Extensive soil disturbance followed by seeding |
| T1B | - | Absence of disturbance and natural regeneration over time, may be coupled with excessive grazing pressure |
| T2B | - | Natural regeneration overtime, followed by reintroduction of historic disturbance regimes |
| T2C | - | Extensive soil disturbance followed by seeding |
| T2A | - | Absence of disturbance and natural regeneration over time, may be coupled with excessive grazing pressure |
| T3A | - | Rangeland seeding |
| T3B | - | Absence of disturbance and natural regeneration over time, may be coupled with excessive grazing pressure |
| T4A | - | Extensive soil disturbance followed by seeding |
State 1 submodel, plant communities
Community 1.1
Shinnery Oak Tallgrass
This plant community represents the reference plant community. It is easily recognized as tallgrasses, intermixed with a scattered understory of shinnery oak and occasional areas of sand sagebrush. Shinnery oak is usually one foot to three feet tall with occasional hybrid mottes whose height can reach from 3-8 feet tall in this state. Hybrid mottes respond to fire similar to shinnery and use of fire creates oak communities with grasses dominating throughout the landscape. Tallgrasses can reach heights from three feet to nine feet tall and usually cover the shinnery oak. The site, at a distance, may look like tallgrass prairie with consistent cover of tallgrasses throughout. Tallgrasses include little bluestem, sand bluestem, switchgrass, and Indiangrass. Shortgrasses include hairy grama, sandbur, windmillgrass, and three-awn. The midgrasses are sand dropseed, fall witchgrass, sand paspalum, sideoats grama, and red and sand lovegrasses. Forb and legume populations and densities are highly dependent on the timing of rainfall during the growing season, season of burn, burn return interval and grazing that would have created fluctuation in the plant community from year to year with the plants that dominated the site. Major forbs and legumes include queen’s delight, annual sunflower, annual buckwheat, leadplant, sessile tickclover and catclaw sensitivebrier. Over the years, this plant community has been maintained by periodic fire and grazing events.
Figure 9. 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 | 1239 | 2259 | 3278 |
| Shrub/Vine | 280 | 519 | 757 |
| Forb | 135 | 258 | 381 |
| Tree | 90 | 171 | 252 |
| Total | 1744 | 3207 | 4668 |
Figure 10. Plant community growth curve (percent production by month). OK0001, Native, Warm Season Grasses. Typically, the summer growing season for warm season grasses begins April 5 to 15 and ends October 15 to 25. Nearly three-fourths of the season production will occur before the first of July. This varies from year to year depending upon temperatures and precipitation..
| 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 | 1 | 5 | 10 | 20 | 30 | 10 | 5 | 10 | 6 | 2 | 1 |
Community 1.2
Moderate Oak Canopy, midgrass, shortgrass, tallgrass
This plant community is composed of a moderately closed oak canopy with an understory of tallgrasses and midgrasses. The lack of fire within the system has allowed shinnery oak to increase in stature to three feet or slightly taller. When the canopy thickens the grasses are interspersed within the oak at much lower levels and the hybrid mottes also increase in height up to fifteen feet or more. They also begin to form a closed canopy forest where the understory is sparsely vegetated by all other components of the plant community. Other woody species may also encroach in the community and they will also increase in abundance and stature without the disturbance of fire or other management. The overstory tree canopy ranges from 50 to 70 percent. Shading and competition for moisture along with woody litter build up on the soil surface begins to shift the plant community away from a tallgrass component to one dominated by midgrasses and shortgrasses. Little bluestem is the dominant grass species of the plant community with sand lovegrass, sideoats grama and other s present in much lower quanitites. Other grasses present include sand bluestem, Indiangrass, switchgrass, purple lovegrass, Scribner’s panicum and Canada wildrye. The more abundant legumes are lespedezas, tickclovers, prairieclovers, and trailing wildbean. Hairy sunflower, Fendler’s aster, wildbuckwheats, fleabanes and goldenrods are the more common forbs. Shrub species such as aromatic sumac, greenbrier and vines including poison ivy and Virginia creeper are common in the understory. To restore the site to near historic conditions would require an extended plan of one or more of the following treatments: mechanical or chemical brush control, moderate grazing and prescribed burning.
Figure 11. 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) |
|---|---|---|---|
| Tree | 762 | 1390 | 2018 |
| Grass/Grasslike | 667 | 1216 | 1765 |
| Forb | 286 | 521 | 757 |
| Shrub/Vine | 191 | 347 | 504 |
| Total | 1906 | 3474 | 5044 |
Figure 12. Plant community growth curve (percent production by month). OK0001, Native, Warm Season Grasses. Typically, the summer growing season for warm season grasses begins April 5 to 15 and ends October 15 to 25. Nearly three-fourths of the season production will occur before the first of July. This varies from year to year depending upon temperatures and precipitation..
| 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 | 1 | 5 | 10 | 20 | 30 | 10 | 5 | 10 | 6 | 2 | 1 |
Community 1.3
Closed Oak Canopy, Midgrass
This plant community is characterized by oak trees forming an overstory canopy of 70 to 85 percent. Understory vegetation is composed primarily of shade tolerant grasses, forbs, shrubs and vines. Shinnery oak and the hybridized oaks are the dominant species. Grasses and grasslike plants are sparse and include Scribner’s panicum, Virginia wildrye, sedges, nimblewill, fringeleaf paspalum, little bluestem, and purpletop. Most shortgrasses are typically not evident in this state. Major forbs include goldenrods, pussytoes, Fendler’s aster, blackeyed susan, croton and showy partridge pea. Woody plants in the understory include greenbrier, buckbrush, dewberry, eastern redcedar, hackberry and chittamwood. Eastern redcedar can begin to seriously invade the open areas of the savannah. Forage production for cattle grazing is very limited. Deer, turkey and small mammals utilize the site for cover and benefit seasonally from acorn and berry production. To restore this community to near historic conditions requires a management plan including herbicide or mechanical brush control treatments, accompanied by a prescribed burning and prescribed grazing. When heavy stands of eastern redcedar or greenbrier occur in the understory a combination of control treatments is required. When the oaks are controlled with herbicides, cedar and greenbrier are released and flourish unless other control measures are employed. As redcedar reaches a height of six feet or more, control usually requires some form of mechanical means. Cedar, six feet or less in height, can often be controlled with fire. In most situations remnant tallgrasses and midgrasses are present in sufficient numbers to provide recovery following brush control treatment. Grazing deferment immediately following treatment of the management actions is essential to assure recovery of the desired plant community.
Figure 13. 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) |
|---|---|---|---|
| Tree | 1410 | 2571 | 3732 |
| Grass/Grasslike | 286 | 521 | 757 |
| Shrub/Vine | 152 | 278 | 404 |
| Forb | 56 | 104 | 151 |
| Total | 1904 | 3474 | 5044 |
Figure 14. Plant community growth curve (percent production by month). OK0001, Native, Warm Season Grasses. Typically, the summer growing season for warm season grasses begins April 5 to 15 and ends October 15 to 25. Nearly three-fourths of the season production will occur before the first of July. This varies from year to year depending upon temperatures and precipitation..
| 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 | 1 | 5 | 10 | 20 | 30 | 10 | 5 | 10 | 6 | 2 | 1 |
Pathway 1.1
Community 1.1 to 1.2
In the abscence of fire and continued overgrazing this community can shift to one more dominated by midgrasses with scattered tallgrasses.
Pathway 1.2A
Community 1.2 to 1.1
With the use of prescribed grazing and prescribed burning this site can return to the reference plant community that is dominated by tallgrasses species.
Pathway 1.2B
Community 1.2 to 1.3
In the absence of fire and repeated overgrazing this site will become dominated by a shinnery oak overstory with mostly midgrasses as the herbaceous component.
Pathway 1.3A
Community 1.3 to 1.2
With the use of prescribed fire and prescribed grazing this site can be returned to a site with less canopy of shinnery and an increase in the amount of tallgrasses. Brush Management can be used to accelerate the process when shinnery oak canopy is very closed and vegetation is sparse.
State 2
Grassland
This plant community results following brush control by use of herbicides and/or mechanical treatments. The vegetation is predominately tallgrasses and midgrasses including sand bluestem, little bluestem, Indiangrass, and switchgrass. Legumes such as slender lespedeza, roundhead lespedeza, and Sessile leaf tickclover and showy partridgepea are usually abundant on the site. These sites can be infested by eastern red cedar and other woody plants without proper management. Where above ground mechanical, or chemical treatments have been used to control shinnery oak, the plant persists through sprouting or possibly from seedlings. Follow-up treatment with fire or herbicides is necessary to maintain this plant community. It is productive and good for grazing cattle, but can be limited in species diversity based on the HPC. In areas where the land has been subjected to repeated deep plowing the shinnery seems to not re-establish in these sites.
Dominant plant species
-
sand bluestem (Andropogon hallii), grass
-
little bluestem (Schizachyrium scoparium), grass
State 3
Cropland
With plowing, brush clearing, mechanical preparation this site has been used for cropland. It is highly unlikely to return to the reference plant community once this site has been used for cropland due to the repeated plowing that removes shinnery from the site. With seeding or sprigging, this site can support a variety of introduced forages for supplemental pasture. Fertilization, weed control, grazing management and occasionally reseeding will be needed to maintain introduced plant communities. See Forage Suitability Group.
State 4
Invaded
This community is indicative of the absence of the shinnery oak as the major tree or shrub component. Invasion of plants like Eastern red cedar, sand sage brush and other brush species can dominate the landscape in response to some management practices aimed at the oak community, along with continuous overgrazing by cattle. This community can eventually develop into dense stands of brush species that would typically be found in minimal amounts within the communities above. Recovery of this community can be very costly along with periods of removal of grazing pressure through a prescribed grazing plan based on climactic conditions and historical management of the site.
Dominant plant species
-
eastern redcedar (Juniperus virginiana), tree
-
sand sagebrush (Artemisia filifolia), shrub
Transition T1A
State 1 to 2
Restoration pathway T1C
State 1 to 3
Transition T1B
State 1 to 4
Transition T2B
State 2 to 1
Transition T2C
State 2 to 3
Transition T2A
State 2 to 4
In the absence of prescribed burning or without the use of brush managment this site can become invaded with other woody species. Typically Eastern Red Cedar will not be present unless the shinnery has been removed from the plant community.
Transition T3A
State 3 to 2
Once cultivation has ended, the site may be left idle or planted to native species. This will transition the site to State 2.
Transition T3B
State 3 to 4
Transition T4A
State 4 to 3
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 Grasses | 919–2690 | ||||
| sand bluestem | ANHA | Andropogon hallii | 364–897 | – | ||
| little bluestem | SCSC | Schizachyrium scoparium | 336–841 | – | ||
| Indiangrass | SONU2 | Sorghastrum nutans | 112–673 | – | ||
| switchgrass | PAVI2 | Panicum virgatum | 146–588 | – | ||
| 2 | Mid Grasses | 112–448 | ||||
| thin paspalum | PASE5 | Paspalum setaceum | 45–135 | – | ||
| sideoats grama | BOCU | Bouteloua curtipendula | 45–118 | – | ||
| sand lovegrass | ERTR3 | Eragrostis trichodes | 11–73 | – | ||
| silver bluestem | BOSA | Bothriochloa saccharoides | 11–56 | – | ||
| California waterwort | ELCA | Elatine californica | 0–34 | – | ||
| Canada wildrye | ELCA4 | Elymus canadensis | 0–34 | – | ||
| purple lovegrass | ERSP | Eragrostis spectabilis | 0–34 | – | ||
| cane bluestem | BOBA3 | Bothriochloa barbinodis | 0–34 | – | ||
| 3 | Other Grasses | 0–140 | ||||
| lespedeza | LESPE | Lespedeza | 99–123 | – | ||
| goldenrod | OLIGO3 | Oligoneuron | 99–123 | – | ||
| white heath aster | SYER | Symphyotrichum ericoides | 99–123 | – | ||
| Baldwin's ironweed | VEBAB | Vernonia baldwinii ssp. baldwinii | 99–123 | – | ||
| hairy grama | BOHI2 | Bouteloua hirsuta | 0–45 | – | ||
| fall witchgrass | DICO6 | Digitaria cognata | 0–45 | – | ||
| Scribner's rosette grass | DIOLS | Dichanthelium oligosanthes var. scribnerianum | 0–45 | – | ||
| tumblegrass | SCPA | Schedonnardus paniculatus | 0–45 | – | ||
| purpletop tridens | TRFL2 | Tridens flavus | 0–45 | – | ||
|
Forb
|
||||||
| 4 | Legumes | 135–381 | ||||
| buckbrush | CECU | Ceanothus cuneatus | 99–123 | – | ||
| Virginia creeper | PAQU2 | Parthenocissus quinquefolia | 99–123 | – | ||
| American plum | PRAM | Prunus americana | 99–123 | – | ||
| dwarf chinquapin oak | QUPR | Quercus prinoides | 99–123 | – | ||
| sumac | RHUS | Rhus | 99–123 | – | ||
| greenbrier | SMILA2 | Smilax | 99–123 | – | ||
| western poison ivy | TORY | Toxicodendron rydbergii | 99–123 | – | ||
| grape | VITIS | Vitis | 99–123 | – | ||
| slimflower scurfpea | PSTE5 | Psoralidium tenuiflorum | 0–90 | – | ||
| Virginia tephrosia | TEVI | Tephrosia virginiana | 0–78 | – | ||
| sessileleaf ticktrefoil | DESE | Desmodium sessilifolium | 0–78 | – | ||
| roundhead lespedeza | LECA8 | Lespedeza capitata | 0–45 | – | ||
| purple prairie clover | DAPU5 | Dalea purpurea | 0–45 | – | ||
| 5 | Forbs | 135–381 | ||||
| queen's-delight | STSYS2 | Stillingia sylvatica ssp. sylvatica | 22–56 | – | ||
| white heath aster | SYER | Symphyotrichum ericoides | 11–34 | – | ||
| common sunflower | HEAN3 | Helianthus annuus | 11–34 | – | ||
| annual buckwheat | ERAN4 | Eriogonum annuum | 11–34 | – | ||
| Indian blanket | GAPU | Gaillardia pulchella | 0–17 | – | ||
| kisses | GASUS | Gaura suffulta ssp. suffulta | 0–17 | – | ||
| crested pricklypoppy | ARPO2 | Argemone polyanthemos | 0–17 | – | ||
| antelopehorns | ASASC | Asclepias asperula ssp. capricornu | 0–17 | – | ||
| blue wild indigo | BAAUM | Baptisia australis var. minor | 0–17 | – | ||
| yellow sundrops | CASE12 | Calylophus serrulatus | 0–17 | – | ||
| Canadian horseweed | COCAC3 | Conyza canadensis var. canadensis | 6–17 | – | ||
| whitemouth dayflower | COER | Commelina erecta | 0–17 | – | ||
| Texas croton | CRTE4 | Croton texensis | 0–17 | – | ||
| common yarrow | ACMI2 | Achillea millefolium | 0–17 | – | ||
| Cuman ragweed | AMPS | Ambrosia psilostachya | 6–17 | – | ||
| bush morning-glory | IPLE | Ipomoea leptophylla | 0–17 | – | ||
| dotted blazing star | LIPU | Liatris punctata | 0–17 | – | ||
| spotted beebalm | MOPU | Monarda punctata | 6–17 | – | ||
| cutleaf evening primrose | OELA | Oenothera laciniata | 0–17 | – | ||
| prairie spiderwort | TROC | Tradescantia occidentalis | 0–17 | – | ||
| Baldwin's ironweed | VEBA | Vernonia baldwinii | 6–17 | – | ||
| upright prairie coneflower | RACO3 | Ratibida columnifera | 0–17 | – | ||
| Missouri goldenrod | SOMI2 | Solidago missouriensis | 0–17 | – | ||
| woolly plantain | PLPA2 | Plantago patagonica | 0–11 | – | ||
| white sagebrush | ARLUL2 | Artemisia ludoviciana ssp. ludoviciana | 0–11 | – | ||
|
Shrub/Vine
|
||||||
| 6 | Shrubs | 280–757 | ||||
| Havard oak | QUHA3 | Quercus havardii | 191–560 | – | ||
| sand sagebrush | ARFI2 | Artemisia filifolia | 34–95 | – | ||
| leadplant | AMCA6 | Amorpha canescens | 0–90 | – | ||
| New Jersey tea | CEAM | Ceanothus americanus | 0–45 | – | ||
| fragrant sumac | RHAR4 | Rhus aromatica | 0–45 | – | ||
| twistspine pricklypear | OPMA2 | Opuntia macrorhiza | 0–34 | – | ||
| Gurney's yucca | YUGLG | Yucca glauca var. gurneyi | 0–34 | – | ||
| saw greenbrier | SMBO2 | Smilax bona-nox | 0–22 | – | ||
| western poison ivy | TORY | Toxicodendron rydbergii | 0–11 | – | ||
| grape | VITIS | Vitis | 0–11 | – | ||
| Virginia creeper | PAQU2 | Parthenocissus quinquefolia | 0–11 | – | ||
| littleleaf sumac | RHMI3 | Rhus microphylla | 0–11 | – | ||
|
Tree
|
||||||
| 7 | Trees | 90–252 | ||||
| netleaf hackberry | CELAR | Celtis laevigata var. reticulata | 39–112 | – | ||
| Chickasaw plum | PRAN3 | Prunus angustifolia | 0–56 | – | ||
| Oklahoma plum | PRGR | Prunus gracilis | 0–56 | – | ||
| western soapberry | SASAD | Sapindus saponaria var. drummondii | 0–56 | – | ||
Table 9. Community 1.2 plant community composition
| Group | Common name | Symbol | Scientific name | Annual production (kg/hectare) | Foliar cover (%) |
|---|
Table 10. Community 1.3 plant community composition
| Group | Common name | Symbol | Scientific name | Annual production (kg/hectare) | Foliar cover (%) |
|---|
Interpretations
Animal community
As brush canopy increases, forage production for cattle decreases. Deer and other wildlife species use the site for some mast. Cover is the main attribute benefitting wildlife. However, with the encroachment of eastern redcedar, wildlife species such as wild turkey leave the site due to vulnerability to predators. In severe cases with thick cedar, there is an overabundance of cover and many wildlife species will avoid the area. Cattle will avoid the site because of flies and the fact that there are limited summer breezes. Dense cedar will limit grazing accessibility as well. In the winter time, cattle will use the area for thermal cover.
Hydrological functions
This ecological site is contained to course permeable soils that allow for rapid infiltration. Loss of water to percolation during heavy rainfall events is common and there is little to no runoff on this site even on slopes up to 20 percent. Plant composition is important to infiltration and these soils are important recharge areas for local aquifers.
Recreational uses
Deep Sand Savannah sites offer scenic opportunities for outdoor recreation including photography, trail rides, camping, and hunting.
Wood products
Wood products include firewood, fence posts and cedar products (mulch and lumber).
Supporting information
Other references
Wade C. Harrell, Samuel D. Fuhlendorf, and Terrence G. Bidwell, Effects of prescribed fire on sand shinnery oak communities, J. Range Manage, 54: 685–690 November 2001.
McGregor, R.L., et al., Atlas of the flora of the Great Plains, Iowa State University Press, 1977 Ames, Iowa,.
Wade C. Harrell, Samuel D. Fuhlendorf, and Terrence G. Bidwell, Effects of prescribed fire on sand shinnery oak communities, J. Range Manage, 54: 685-690 November 2001.
Boyd. C. S.and T. G. Bidwell. 2002 Effects of prescribed fire on shinnery oak(Quercus havardii) plant communities in western Oklahoma. Restoration Ecology 10:324-333
Hoagland, B.W. 2000 . The vegetation of Oklahoma: a classification for landscape mapping and conservation planning. Southwestern Naturalist 45:385-420.
Roger S. Peterson, Chad S Boyd, Ecology and Management of Sand Shinnery Communities: A Literature Review; Gen Technical Report RMRS-GTR-16. US Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fort Collins, Co. 44 Pages
Dhillion, S.S., M.A. McGinley, C.F. Friese, and J.C. Zak. 1994Constrcution of sand shinnery oak communities of the Llano Estacado: animal disturbances, plant community structure, and restoration. Restoration Ecology 2:51-60
Pettit, R.D.1994. Sand shinnery oak. P. 106. In T. N. Shiflet, editor, Rangeland Cover Types of the United States. SRM 730. Denver:Society for Range Management 152pp.
Smith, A.L. 1993. Environmental and management effects on plant species composition within ecological sites of the Black Kettle national grassland in western Oklahoma. Master of Science Thesis, Oklahoma State University, Stillwater, Oklahoma.
Wright, H.A. and A.W. Bailey. 1982. Fire Ecology: United States and southern Canada. John Wiley and Sons, New York
Boyd, C.S., and T.G. Bidwell. 2001. Influence of prescribed fire on lesser prairie-chicken habitat in shinnery oak communities in western Oklahoma. Wildlife. Soc. Bull. 29(3): 938-947
Contributors
Brandon Reavis State Rangeland Managment Specialist, Stillwater, Oklahoma
Dr. Jack Eckroat, Grazing Lands Specialist, NRCS, Oklahoma
PES Edits by Tyson Morley, MLRA Soil Scientist, Altus, Oklahoma
Approval
Bryan Christensen, 9/15/2023
Acknowledgments
Site Development and Testing Plan
Future work, as described in a Project Plan, to validate the information in this Provisional Ecological Site Description is needed. This will include field activities to collect low, medium and high intensity sampling, soil correlations, and analysis of that data. Annual field reviews should be done by soil scientists and vegetation specialists. A final field review, peer review, quality control, and quality assurance reviews of the ESD will be needed to produce the final document.
Annual reviews of the Project Plan are to be conducted by the Ecological Site Technical Team.
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) | Mark Moseley, Jack Eckroat |
|---|---|
| Contact for lead author | 100 USDA Suite 206, Stillwater, OK 74074 |
| Date | 12/04/2007 |
| Approved by | Brandon Reavis |
| Approval date | |
| Composition (Indicators 10 and 12) based on | Annual Production |
Indicators
-
Number and extent of rills:
None -
Presence of water flow patterns:
None -
Number and height of erosional pedestals or terracettes:
None -
Bare ground from Ecological Site Description or other studies (rock, litter, lichen, moss, plant canopy are not bare ground):
Variable but should average about 5 - 15%. -
Number of gullies and erosion associated with gullies:
None -
Extent of wind scoured, blowouts and/or depositional areas:
None -
Amount of litter movement (describe size and distance expected to travel):
Not much litter movement due to high infiltration rates. Twelve inches maximum, and only with strong winds. -
Soil surface (top few mm) resistance to erosion (stability values are averages - most sites will show a range of values):
Stability score 4 – 6. Stability scores based on a minimum of 6 samples tested. -
Soil surface structure and SOM content (include type of structure and A-horizon color and thickness):
See Soil Series Description. -
Effect of community phase composition (relative proportion of different functional groups) and spatial distribution on infiltration and runoff:
Runoff and infiltration are not affected by changes in plant community composition due to rapidly permeable soils with a plant cover of trees, shrubs, tall and midgrasses. -
Presence and thickness of compaction layer (usually none; describe soil profile features which may be mistaken for compaction on this site):
None. -
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:
TallgrassesSub-dominant:
midgrasses (little bluestem)Other:
Trees/shrubs > shortgrasses > forbs > cool season grasses and grasslikes.Additional:
Tallgrasses > midgrasses (little bluestem) > Trees/shrubs > shortgrasses > forbs > cool season grasses and grasslikes. -
Amount of plant mortality and decadence (include which functional groups are expected to show mortality or decadence):
There can be some plant loss due to droughty nature of the site, especially after severe drought, but should be less than 10%. -
Average percent litter cover (%) and depth ( in):
Litter cover should average 85% at a depth not more than 1 inch, depending upon the location of leaf litter. -
Expected annual annual-production (this is TOTAL above-ground annual-production, not just forage annual-production):
1555 – 4100#/acre -
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:
Invasives might include: eastern redcedar, annuals and non-natives.
-
Perennial plant reproductive capability:
All plants capable of reproducing at least every 2 – 3 years.
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The Ecosystem Dynamics Interpretive Tool is an information system framework developed by the USDA-ARS Jornada Experimental Range, USDA Natural Resources Conservation Service, and New Mexico State University.
Click on box and path labels to scroll to the respective text.
Ecosystem states
| T1A | - | Mechanical or chemical removal of woody species |
|---|---|---|
| T1C | - | Extensive soil disturbance followed by seeding |
| T1B | - | Absence of disturbance and natural regeneration over time, may be coupled with excessive grazing pressure |
| T2B | - | Natural regeneration overtime, followed by reintroduction of historic disturbance regimes |
| T2C | - | Extensive soil disturbance followed by seeding |
| T2A | - | Absence of disturbance and natural regeneration over time, may be coupled with excessive grazing pressure |
| T3A | - | Rangeland seeding |
| T3B | - | Absence of disturbance and natural regeneration over time, may be coupled with excessive grazing pressure |
| T4A | - | Extensive soil disturbance followed by seeding |